Oil Cooled Distribution Transformer-As Per Is 2026
Pioneers in the industry, we offer 1500 kva oil cooled type distribution transformer - oltc ( as per is : 2026), 4000 kva oil cooled type distribution transformer - octc ( as per is : 2026), 400 kva oil cooled type distribution transformer - oltc ( as per is : 2026), 315 kva oil cooled type distribution transformer - oltc ( as per is : 2026), 2500 kva oil cooled type distribution transformer - octc ( as per is : 2026) and 630 kva oil cooled type distribution transformer - octc ( as per is : 2026) from India.
1500 KVA Oil Cooled Type Distribution Transformer - OLTC ( As Per Is : 2026)
₹ 2072000 / Piece Get Latest Price
| Power Rating | 1500 KVA |
| KVA Capacity | 1500 KVA |
| Voltage Ratio | 11 / 0.433 KV |
| Energy Lable | As Per Is : 2026 |
| Number Of Phase | 3 Phase |
| Frequency | 50/60 HZ |
| Type Of Installation | Indoor / Outdoor |
| Duty Cycle | Contionus |
| Types Of Cooling | ONAN |
| Types Of Tap Changer | OLTC |
| Tapping Range in + | 10 % |
| Tapping Range in - | 10 % |
| No Load Losses | 1800 W |
| Load Losses | 16950 W |
| Full Load Losses | 18750 W |
| Impedane | 5 % |
| Type Of Connection | DYN11 (As Per Requirement ) |
| Tempreture In Oil | 40 Degree |
| Tempreture In Winding | 45 Degree |
Minimum order quantity: 1 Piece
An oil-cooled distribution transformer is designed to step down high voltage electricity for safe distribution to residential, commercial, or industrial users. The cooling is facilitated by mineral oil or synthetic ester fluids, which also serve as an insulating medium. The On-Load Tap Changer (OLTC) allows for voltage regulation under load without interrupting the power supply.
2. Key Features:| Feature | Description |
|---|---|
| Cooling Type | Oil-immersed (ONAN / ONAF) |
| Voltage Rating | Commonly from 11kV / 22kV / 33kV to 400V |
| Power Rating | Typically from 100 kVA to 5 MVA for distribution purposes |
| Tap Changer Type | On-Load Tap Changer (OLTC), motor-operated |
| Tap Range | ±10% in 1.25% steps (usually 17 steps total) |
| Insulating Medium | Mineral Oil / Synthetic Ester (Eco-friendly options available) |
| Cooling Class | ONAN (Oil Natural Air Natural) / ONAF (Oil Natural Air Forced) |
| Transformer Standard | IEC 60076 / IS 1180 / IS 2026 |
| Digital Integration | SCADA-compatible, IoT sensors, digital OLTC monitoring, DGA sensors |
-
Purpose: Regulates the output voltage in response to load variations, maintaining voltage within prescribed limits.
-
Operation: Operates under load via a motor-driven mechanism. Changes the tap position of the HV winding without power interruption.
-
Tap Changer Location: Usually installed in the HV side of the transformer.
-
Control System:
-
Tap Position Indicator
-
Automatic Voltage Regulator (AVR)
-
Motor Drive Unit (MDU)
-
Remote monitoring via SCADA/IoT in 2026 designs
-
-
Digital Tap Position Feedback
-
Smart sensors for temperature, oil level, gas analysis
-
Eco-friendly fluids for fire safety and biodegradability
-
Remote diagnostics and predictive maintenance
-
Integrated Buchholz relay, WTI, OTI, and PRD
-
Low-loss CRGO / amorphous metal cores
-
IoT-enabled OLTC actuator for advanced control
-
Utility power distribution networks
-
Renewable energy grid interfacing (solar, wind)
-
Industrial facilities requiring voltage regulation
-
Urban substations with load variability
4000 KVA Oil Cooled Type Distribution Transformer - OCTC ( As Per Is : 2026)
₹ 3360000 / Piece Get Latest Price
| Power Rating | 4000 KVA |
| KVA Capacity | 4000 KVA |
| Voltage Ratio | 11 / 0.433 KV |
| Energy Lable | As Per Is : 2026 |
| Number Of Phase | 3 Phase |
| Frequency | 50/60 HZ |
| Type Of Installation | Indoor / Outdoor |
| Duty Cycle | Contionus |
| Types Of Cooling | ONAN |
| Types Of Tap Changer | OCTC |
| Tapping Range in + | 5 % |
| Tapping Range in - | 5 % |
| No Load Losses | 3600 W |
| Load Losses | 40000 W |
| Full Load Losses | 43600 W |
| Impedane | 7 % |
| Type Of Connection | DYN11 (As Per Requirement ) |
| Tempreture In Oil | 40 Degree |
| Tempreture In Winding | 45 Degree |
Minimum order quantity: 1 Piece
-
IS 2026 is the Indian Standard titled “Power Transformers” (multiple parts) which lays down design, construction, testing, and performance requirements for oil‑immersed (liquid‑immersed) power and distribution transformers.
-
There are also related standards: IS 1180 (for distribution transformers), IS 335 (for transformer oil), etc. These complement IS 2026.
Here are the usual components and features of oil‑cooled transformers meeting IS 2026:
| Component | Description / Requirement |
|---|---|
| Core | Built from cold‑rolled, grain‑oriented silicon steel laminations. Stamped sheets. Coated/insulated to resist oil and high temperature. Core limbs bound tightly; proper yokes; mechanical clamping to avoid vibration and core losses. |
| Windings | High‐tension (HT) and low‐tension (LT) windings. Usually cylindrical / helical for LT; paper‑covered conductors; sometimes disc type for large ratings. Insulation between turns and layers per relevant impulse withstand levels. Spacers and support to hold windings rigid. |
| Insulation | Use of pressboard, kraft paper, etc. For oil impregnation. Insulation must be rated for thermal stresses and aging. Oil used must comply with IS 335 (mineral oil) or other approved insulating fluids (like synthetic/natural esters) if agreed. |
| Oil / Insulating Liquid | Mineral insulating oil is standard. Must meet dielectric strength, viscosity, flash & fire point, chemical properties as per IS 335. In some newer / eco designs, ester oil or other fluid may be used. First filling, oil sampling, pre‑testing. Oil also used to cool and insulate. |
| Cooling System | Natural oil circulation (ONAN) is common for many distribution and medium sized power transformers. For larger ratings, forced cooling (forced oil, forced air), radiators, corrugated tanks, etc. Temperature rise limits are prescribed. |
| Tap Changers / Tappings | OCTC or OLTC depending on requirement. Taps to allow adjustment for voltage variation. Commonly ±5% in steps of 2.5% or similar. |
| Temperature Rise Limits | The standard prescribes limits for winding temperature (by resistance method) and top oil temperature (by thermometer) for given cooling mode (e.g., ONAN). For many ratings (e.g. common distribution transformers), winding rise ≈ 40‑50 °C, top oil ≈ 35‑45 °C, etc., depending on voltage class and rating. |
| Losses (No‐load & Load Losses) | Must be within prescribed limits. IS standards give maximum permissible values. Manufacturers strive for low core loss (no‑load loss) and lower load loss to improve efficiency. Sometimes star rating levels or efficiency classes are defined. |
-
Power utility‑step down at substations
-
Distribution to residential/commercial/industrial loads
-
Renewable energy plants (solar, wind) connecting to grid
-
Industrial plants needing reliable voltage transformation
-
Locations where safety / fire risk / environmental regulations demand safer insulating fluids
400 KVA Oil Cooled Type Distribution Transformer - OLTC ( As Per Is : 2026)
₹ 1077000 / Piece Get Latest Price
| Power Rating | 400 KVA |
| KVA Capacity | 400 KVA |
| Voltage Ratio | 11 / 0.433 KV |
| Energy Lable | As Per Is : 2026 |
| Number Of Phase | 3 Phase |
| Frequency | 50/60 HZ |
| Type Of Installation | Indoor / Outdoor |
| Duty Cycle | Contionus |
| Types Of Cooling | ONAN |
| Types Of Tap Changer | OLTC |
| Tapping Range in + | 10 % |
| Tapping Range in - | 10 % |
| No Load Losses | 720 W |
| Load Losses | 6000 W |
| Full Load Losses | 6720 W |
| Impedane | 4.5 % |
| Type Of Connection | DYN11 (As Per Requirement ) |
| Tempreture In Oil | 40 Degree |
| Tempreture In Winding | 45 Degree |
Minimum order quantity: 1 Piece
An oil-cooled distribution transformer is designed to step down high voltage electricity for safe distribution to residential, commercial, or industrial users. The cooling is facilitated by mineral oil or synthetic ester fluids, which also serve as an insulating medium. The On-Load Tap Changer (OLTC) allows for voltage regulation under load without interrupting the power supply.
2. Key Features:| Feature | Description |
|---|---|
| Cooling Type | Oil-immersed (ONAN / ONAF) |
| Voltage Rating | Commonly from 11kV / 22kV / 33kV to 400V |
| Power Rating | Typically from 100 kVA to 5 MVA for distribution purposes |
| Tap Changer Type | On-Load Tap Changer (OLTC), motor-operated |
| Tap Range | ±10% in 1.25% steps (usually 17 steps total) |
| Insulating Medium | Mineral Oil / Synthetic Ester (Eco-friendly options available) |
| Cooling Class | ONAN (Oil Natural Air Natural) / ONAF (Oil Natural Air Forced) |
| Transformer Standard | IEC 60076 / IS 1180 / IS 2026 |
| Digital Integration | SCADA-compatible, IoT sensors, digital OLTC monitoring, DGA sensors |
-
Purpose: Regulates the output voltage in response to load variations, maintaining voltage within prescribed limits.
-
Operation: Operates under load via a motor-driven mechanism. Changes the tap position of the HV winding without power interruption.
-
Tap Changer Location: Usually installed in the HV side of the transformer.
-
Control System:
-
Tap Position Indicator
-
Automatic Voltage Regulator (AVR)
-
Motor Drive Unit (MDU)
-
Remote monitoring via SCADA/IoT in 2026 designs
-
-
Digital Tap Position Feedback
-
Smart sensors for temperature, oil level, gas analysis
-
Eco-friendly fluids for fire safety and biodegradability
-
Remote diagnostics and predictive maintenance
-
Integrated Buchholz relay, WTI, OTI, and PRD
-
Low-loss CRGO / amorphous metal cores
-
IoT-enabled OLTC actuator for advanced control
-
Utility power distribution networks
-
Renewable energy grid interfacing (solar, wind)
-
Industrial facilities requiring voltage regulation
-
Urban substations with load variability
315 KVA Oil Cooled Type Distribution Transformer - OLTC ( As Per Is : 2026)
₹ 1008000 / Piece Get Latest Price
| Power Rating | 315 KVA |
| KVA Capacity | 315 KVA |
| Voltage Ratio | 11 / 0.433 KV |
| Energy Lable | As Per Is : 2026 |
| Number Of Phase | 3 Phase |
| Frequency | 50/60 HZ |
| Type Of Installation | Indoor / Outdoor |
| Duty Cycle | Contionus |
| Types Of Cooling | ONAN |
| Types Of Tap Changer | OLTC |
| Tapping Range in + | 10 % |
| Tapping Range in - | 10 % |
| No Load Losses | 600 W |
| Load Losses | 5150 W |
| Full Load Losses | 5750 W |
| Impedane | 4.5 % |
| Type Of Connection | DYN11 (As Per Requirement ) |
| Tempreture In Oil | 40 Degree |
| Tempreture In Winding | 45 Degree |
Minimum order quantity: 1 Piece
An oil-cooled distribution transformer is designed to step down high voltage electricity for safe distribution to residential, commercial, or industrial users. The cooling is facilitated by mineral oil or synthetic ester fluids, which also serve as an insulating medium. The On-Load Tap Changer (OLTC) allows for voltage regulation under load without interrupting the power supply.
2. Key Features:| Feature | Description |
|---|---|
| Cooling Type | Oil-immersed (ONAN / ONAF) |
| Voltage Rating | Commonly from 11kV / 22kV / 33kV to 400V |
| Power Rating | Typically from 100 kVA to 5 MVA for distribution purposes |
| Tap Changer Type | On-Load Tap Changer (OLTC), motor-operated |
| Tap Range | ±10% in 1.25% steps (usually 17 steps total) |
| Insulating Medium | Mineral Oil / Synthetic Ester (Eco-friendly options available) |
| Cooling Class | ONAN (Oil Natural Air Natural) / ONAF (Oil Natural Air Forced) |
| Transformer Standard | IEC 60076 / IS 1180 / IS 2026 |
| Digital Integration | SCADA-compatible, IoT sensors, digital OLTC monitoring, DGA sensors |
-
Purpose: Regulates the output voltage in response to load variations, maintaining voltage within prescribed limits.
-
Operation: Operates under load via a motor-driven mechanism. Changes the tap position of the HV winding without power interruption.
-
Tap Changer Location: Usually installed in the HV side of the transformer.
-
Control System:
-
Tap Position Indicator
-
Automatic Voltage Regulator (AVR)
-
Motor Drive Unit (MDU)
-
Remote monitoring via SCADA/IoT in 2026 designs
-
-
Digital Tap Position Feedback
-
Smart sensors for temperature, oil level, gas analysis
-
Eco-friendly fluids for fire safety and biodegradability
-
Remote diagnostics and predictive maintenance
-
Integrated Buchholz relay, WTI, OTI, and PRD
-
Low-loss CRGO / amorphous metal cores
-
IoT-enabled OLTC actuator for advanced control
-
Utility power distribution networks
-
Renewable energy grid interfacing (solar, wind)
-
Industrial facilities requiring voltage regulation
-
Urban substations with load variability
2500 KVA Oil Cooled Type Distribution Transformer - OCTC ( As Per Is : 2026)
₹ 239000 / Piece Get Latest Price
| Power Rating | 2500 KVA |
| KVA Capacity | 2500 KVA |
| Voltage Ratio | 11 / 0.433 KV |
| Energy Lable | As Per Is : 2026 |
| Number Of Phase | 3 Phase |
| Frequency | 50/60 HZ |
| Type Of Installation | Indoor / Outdoor |
| Duty Cycle | Contionus |
| Types Of Cooling | ONAN |
| Types Of Tap Changer | OCTC |
| Tapping Range in + | 5 % |
| Tapping Range in - | 5 % |
| No Load Losses | 2600 W |
| Load Losses | 24900 W |
| Full Load Losses | 27500 W |
| Impedane | 6 % |
| Type Of Connection | DYN11 (As Per Requirement ) |
| Tempreture In Oil | 40 Degree |
| Tempreture In Winding | 45 Degree |
Minimum order quantity: 1 Piece
-
IS 2026 is the Indian Standard titled “Power Transformers” (multiple parts) which lays down design, construction, testing, and performance requirements for oil‑immersed (liquid‑immersed) power and distribution transformers.
-
There are also related standards: IS 1180 (for distribution transformers), IS 335 (for transformer oil), etc. These complement IS 2026.
Here are the usual components and features of oil‑cooled transformers meeting IS 2026:
| Component | Description / Requirement |
|---|---|
| Core | Built from cold‑rolled, grain‑oriented silicon steel laminations. Stamped sheets. Coated/insulated to resist oil and high temperature. Core limbs bound tightly; proper yokes; mechanical clamping to avoid vibration and core losses. |
| Windings | High‐tension (HT) and low‐tension (LT) windings. Usually cylindrical / helical for LT; paper‑covered conductors; sometimes disc type for large ratings. Insulation between turns and layers per relevant impulse withstand levels. Spacers and support to hold windings rigid. |
| Insulation | Use of pressboard, kraft paper, etc. For oil impregnation. Insulation must be rated for thermal stresses and aging. Oil used must comply with IS 335 (mineral oil) or other approved insulating fluids (like synthetic/natural esters) if agreed. |
| Oil / Insulating Liquid | Mineral insulating oil is standard. Must meet dielectric strength, viscosity, flash & fire point, chemical properties as per IS 335. In some newer / eco designs, ester oil or other fluid may be used. First filling, oil sampling, pre‑testing. Oil also used to cool and insulate. |
| Cooling System | Natural oil circulation (ONAN) is common for many distribution and medium sized power transformers. For larger ratings, forced cooling (forced oil, forced air), radiators, corrugated tanks, etc. Temperature rise limits are prescribed. |
| Tap Changers / Tappings | OCTC or OLTC depending on requirement. Taps to allow adjustment for voltage variation. Commonly ±5% in steps of 2.5% or similar. |
| Temperature Rise Limits | The standard prescribes limits for winding temperature (by resistance method) and top oil temperature (by thermometer) for given cooling mode (e.g., ONAN). For many ratings (e.g. common distribution transformers), winding rise ≈ 40‑50 °C, top oil ≈ 35‑45 °C, etc., depending on voltage class and rating. |
| Losses (No‐load & Load Losses) | Must be within prescribed limits. IS standards give maximum permissible values. Manufacturers strive for low core loss (no‑load loss) and lower load loss to improve efficiency. Sometimes star rating levels or efficiency classes are defined. |
-
Power utility‑step down at substations
-
Distribution to residential/commercial/industrial loads
-
Renewable energy plants (solar, wind) connecting to grid
-
Industrial plants needing reliable voltage transformation
-
Locations where safety / fire risk / environmental regulations demand safer insulating fluids
630 KVA Oil Cooled Type Distribution Transformer - OCTC ( As Per Is : 2026)
₹ 926000 / Piece Get Latest Price
| Power Rating | 630 KVA |
| KVA Capacity | 630 KVA |
| Voltage Ratio | 11 / 0.433 KV |
| Energy Lable | As Per Is : 2026 |
| Number Of Phase | 3 Phase |
| Frequency | 50/60 HZ |
| Type Of Installation | Indoor / Outdoor |
| Duty Cycle | Contionus |
| Types Of Cooling | ONAN |
| Types Of Tap Changer | OCTC |
| Tapping Range in + | 5 % |
| Tapping Range in - | 5 % |
| No Load Losses | 945 W |
| Load Losses | 8505 W |
| Full Load Losses | 9450 W |
| Impedane | 4.5 % |
| Type Of Connection | DYN11 (As Per Requirement ) |
| Tempreture In Oil | 40 Degree |
| Tempreture In Winding | 45 Degree |
Minimum order quantity: 1 Piece
-
IS 2026 is the Indian Standard titled “Power Transformers” (multiple parts) which lays down design, construction, testing, and performance requirements for oil‑immersed (liquid‑immersed) power and distribution transformers.
-
There are also related standards: IS 1180 (for distribution transformers), IS 335 (for transformer oil), etc. These complement IS 2026.
Here are the usual components and features of oil‑cooled transformers meeting IS 2026:
| Component | Description / Requirement |
|---|---|
| Core | Built from cold‑rolled, grain‑oriented silicon steel laminations. Stamped sheets. Coated/insulated to resist oil and high temperature. Core limbs bound tightly; proper yokes; mechanical clamping to avoid vibration and core losses. |
| Windings | High‐tension (HT) and low‐tension (LT) windings. Usually cylindrical / helical for LT; paper‑covered conductors; sometimes disc type for large ratings. Insulation between turns and layers per relevant impulse withstand levels. Spacers and support to hold windings rigid. |
| Insulation | Use of pressboard, kraft paper, etc. For oil impregnation. Insulation must be rated for thermal stresses and aging. Oil used must comply with IS 335 (mineral oil) or other approved insulating fluids (like synthetic/natural esters) if agreed. |
| Oil / Insulating Liquid | Mineral insulating oil is standard. Must meet dielectric strength, viscosity, flash & fire point, chemical properties as per IS 335. In some newer / eco designs, ester oil or other fluid may be used. First filling, oil sampling, pre‑testing. Oil also used to cool and insulate. |
| Cooling System | Natural oil circulation (ONAN) is common for many distribution and medium sized power transformers. For larger ratings, forced cooling (forced oil, forced air), radiators, corrugated tanks, etc. Temperature rise limits are prescribed. |
| Tap Changers / Tappings | OCTC or OLTC depending on requirement. Taps to allow adjustment for voltage variation. Commonly ±5% in steps of 2.5% or similar. |
| Temperature Rise Limits | The standard prescribes limits for winding temperature (by resistance method) and top oil temperature (by thermometer) for given cooling mode (e.g., ONAN). For many ratings (e.g. common distribution transformers), winding rise ≈ 40‑50 °C, top oil ≈ 35‑45 °C, etc., depending on voltage class and rating. |
| Losses (No‐load & Load Losses) | Must be within prescribed limits. IS standards give maximum permissible values. Manufacturers strive for low core loss (no‑load loss) and lower load loss to improve efficiency. Sometimes star rating levels or efficiency classes are defined. |
-
Power utility‑step down at substations
-
Distribution to residential/commercial/industrial loads
-
Renewable energy plants (solar, wind) connecting to grid
-
Industrial plants needing reliable voltage transformation
-
Locations where safety / fire risk / environmental regulations demand safer insulating fluids
800 KVA Oil Cooled Type Distribution Transformer - OLTC ( As Per Is : 2026)
₹ 1450000 / Piece Get Latest Price
| Power Rating | 800 KVA |
| KVA Capacity | 800 KVA |
| Voltage Ratio | 11 / 0.433 KV |
| Energy Lable | As Per Is : 2026 |
| Number Of Phase | 3 Phase |
| Frequency | 50/60 HZ |
| Type Of Installation | Indoor / Outdoor |
| Duty Cycle | Contionus |
| Types Of Cooling | ONAN |
| Types Of Tap Changer | OLTC |
| Tapping Range in + | 10 % |
| Tapping Range in - | 10 % |
| No Load Losses | 1120 W |
| Load Losses | 10080 W |
| Full Load Losses | 11200 W |
| Impedane | 4.5 % |
| Type Of Connection | DYN11 (As Per Requirement ) |
| Tempreture In Oil | 40 Degree |
| Tempreture In Winding | 45 Degree |
Minimum order quantity: 1 Piece
An oil-cooled distribution transformer is designed to step down high voltage electricity for safe distribution to residential, commercial, or industrial users. The cooling is facilitated by mineral oil or synthetic ester fluids, which also serve as an insulating medium. The On-Load Tap Changer (OLTC) allows for voltage regulation under load without interrupting the power supply.
2. Key Features:| Feature | Description |
|---|---|
| Cooling Type | Oil-immersed (ONAN / ONAF) |
| Voltage Rating | Commonly from 11kV / 22kV / 33kV to 400V |
| Power Rating | Typically from 100 kVA to 5 MVA for distribution purposes |
| Tap Changer Type | On-Load Tap Changer (OLTC), motor-operated |
| Tap Range | ±10% in 1.25% steps (usually 17 steps total) |
| Insulating Medium | Mineral Oil / Synthetic Ester (Eco-friendly options available) |
| Cooling Class | ONAN (Oil Natural Air Natural) / ONAF (Oil Natural Air Forced) |
| Transformer Standard | IEC 60076 / IS 1180 / IS 2026 |
| Digital Integration | SCADA-compatible, IoT sensors, digital OLTC monitoring, DGA sensors |
-
Purpose: Regulates the output voltage in response to load variations, maintaining voltage within prescribed limits.
-
Operation: Operates under load via a motor-driven mechanism. Changes the tap position of the HV winding without power interruption.
-
Tap Changer Location: Usually installed in the HV side of the transformer.
-
Control System:
-
Tap Position Indicator
-
Automatic Voltage Regulator (AVR)
-
Motor Drive Unit (MDU)
-
Remote monitoring via SCADA/IoT in 2026 designs
-
-
Digital Tap Position Feedback
-
Smart sensors for temperature, oil level, gas analysis
-
Eco-friendly fluids for fire safety and biodegradability
-
Remote diagnostics and predictive maintenance
-
Integrated Buchholz relay, WTI, OTI, and PRD
-
Low-loss CRGO / amorphous metal cores
-
IoT-enabled OLTC actuator for advanced control
-
Utility power distribution networks
-
Renewable energy grid interfacing (solar, wind)
-
Industrial facilities requiring voltage regulation
-
Urban substations with load variability
1250 KVA Oil Cooled Type Distribution Transformer - OLTC ( As Per Is : 2026)
₹ 1839000 / Piece Get Latest Price
| Power Rating | 1250 KVA |
| KVA Capacity | 1250 KVA |
| Voltage Ratio | 11 / 0.433 KV |
| Energy Lable | As Per Is : 2026 |
| Number Of Phase | 3 Phase |
| Frequency | 50/60 HZ |
| Type Of Installation | Indoor / Outdoor |
| Duty Cycle | Contionus |
| Types Of Cooling | ONAN |
| Types Of Tap Changer | OLTC |
| Tapping Range in + | 10 % |
| Tapping Range in - | 10 % |
| No Load Losses | 1500 W |
| Load Losses | 15000 W |
| Full Load Losses | 16500 W |
| Impedane | 5 % |
| Type Of Connection | DYN11 (As Per Requirement ) |
| Tempreture In Oil | 40 Degree |
| Tempreture In Winding | 45 Degree |
Minimum order quantity: 1 Piece
An oil-cooled distribution transformer is designed to step down high voltage electricity for safe distribution to residential, commercial, or industrial users. The cooling is facilitated by mineral oil or synthetic ester fluids, which also serve as an insulating medium. The On-Load Tap Changer (OLTC) allows for voltage regulation under load without interrupting the power supply.
2. Key Features:| Feature | Description |
|---|---|
| Cooling Type | Oil-immersed (ONAN / ONAF) |
| Voltage Rating | Commonly from 11kV / 22kV / 33kV to 400V |
| Power Rating | Typically from 100 kVA to 5 MVA for distribution purposes |
| Tap Changer Type | On-Load Tap Changer (OLTC), motor-operated |
| Tap Range | ±10% in 1.25% steps (usually 17 steps total) |
| Insulating Medium | Mineral Oil / Synthetic Ester (Eco-friendly options available) |
| Cooling Class | ONAN (Oil Natural Air Natural) / ONAF (Oil Natural Air Forced) |
| Transformer Standard | IEC 60076 / IS 1180 / IS 2026 |
| Digital Integration | SCADA-compatible, IoT sensors, digital OLTC monitoring, DGA sensors |
-
Purpose: Regulates the output voltage in response to load variations, maintaining voltage within prescribed limits.
-
Operation: Operates under load via a motor-driven mechanism. Changes the tap position of the HV winding without power interruption.
-
Tap Changer Location: Usually installed in the HV side of the transformer.
-
Control System:
-
Tap Position Indicator
-
Automatic Voltage Regulator (AVR)
-
Motor Drive Unit (MDU)
-
Remote monitoring via SCADA/IoT in 2026 designs
-
-
Digital Tap Position Feedback
-
Smart sensors for temperature, oil level, gas analysis
-
Eco-friendly fluids for fire safety and biodegradability
-
Remote diagnostics and predictive maintenance
-
Integrated Buchholz relay, WTI, OTI, and PRD
-
Low-loss CRGO / amorphous metal cores
-
IoT-enabled OLTC actuator for advanced control
-
Utility power distribution networks
-
Renewable energy grid interfacing (solar, wind)
-
Industrial facilities requiring voltage regulation
-
Urban substations with load variability
630 KVA Oil Cooled Type Distribution Transformer - OLTC ( As Per Is : 2026)
₹ 1286000 / Piece Get Latest Price
| Power Rating | 630 KVA |
| KVA Capacity | 630 KVA |
| Voltage Ratio | 11 / 0.433 KV |
| Energy Lable | As Per Is : 2026 |
| Number Of Phase | 3 Phase |
| Frequency | 50/60 HZ |
| Type Of Installation | Indoor / Outdoor |
| Duty Cycle | Contionus |
| Types Of Cooling | ONAN |
| Types Of Tap Changer | OLTC |
| Tapping Range in + | 10 % |
| Tapping Range in - | 10 % |
| No Load Losses | 945 W |
| Load Losses | 8505 W |
| Full Load Losses | 9450 W |
| Impedane | 4.5 % |
| Type Of Connection | DYN11 (As Per Requirement ) |
| Tempreture In Oil | 40 Degree |
| Tempreture In Winding | 45 Degree |
Minimum order quantity: 1 Piece
An oil-cooled distribution transformer is designed to step down high voltage electricity for safe distribution to residential, commercial, or industrial users. The cooling is facilitated by mineral oil or synthetic ester fluids, which also serve as an insulating medium. The On-Load Tap Changer (OLTC) allows for voltage regulation under load without interrupting the power supply.
2. Key Features:| Feature | Description |
|---|---|
| Cooling Type | Oil-immersed (ONAN / ONAF) |
| Voltage Rating | Commonly from 11kV / 22kV / 33kV to 400V |
| Power Rating | Typically from 100 kVA to 5 MVA for distribution purposes |
| Tap Changer Type | On-Load Tap Changer (OLTC), motor-operated |
| Tap Range | ±10% in 1.25% steps (usually 17 steps total) |
| Insulating Medium | Mineral Oil / Synthetic Ester (Eco-friendly options available) |
| Cooling Class | ONAN (Oil Natural Air Natural) / ONAF (Oil Natural Air Forced) |
| Transformer Standard | IEC 60076 / IS 1180 / IS 2026 |
| Digital Integration | SCADA-compatible, IoT sensors, digital OLTC monitoring, DGA sensors |
-
Purpose: Regulates the output voltage in response to load variations, maintaining voltage within prescribed limits.
-
Operation: Operates under load via a motor-driven mechanism. Changes the tap position of the HV winding without power interruption.
-
Tap Changer Location: Usually installed in the HV side of the transformer.
-
Control System:
-
Tap Position Indicator
-
Automatic Voltage Regulator (AVR)
-
Motor Drive Unit (MDU)
-
Remote monitoring via SCADA/IoT in 2026 designs
-
-
Digital Tap Position Feedback
-
Smart sensors for temperature, oil level, gas analysis
-
Eco-friendly fluids for fire safety and biodegradability
-
Remote diagnostics and predictive maintenance
-
Integrated Buchholz relay, WTI, OTI, and PRD
-
Low-loss CRGO / amorphous metal cores
-
IoT-enabled OLTC actuator for advanced control
-
Utility power distribution networks
-
Renewable energy grid interfacing (solar, wind)
-
Industrial facilities requiring voltage regulation
-
Urban substations with load variability
5000 KVA Oil Cooled Type Distribution Transformer - OLTC ( As Per Is : 2026)
₹ 4284000 / Piece Get Latest Price
| Power Rating | 5000 KVA |
| KVA Capacity | 5000 KVA |
| Voltage Ratio | 11 / 0.433 KV |
| Energy Lable | As Per Is : 2026 |
| Number Of Phase | 3 Phase |
| Frequency | 50/60 HZ |
| Type Of Installation | Indoor / Outdoor |
| Duty Cycle | Contionus |
| Types Of Cooling | ONAN |
| Types Of Tap Changer | OLTC |
| Tapping Range in + | 10 % |
| Tapping Range in - | 10 % |
| No Load Losses | 4000 W |
| Load Losses | 46000 W |
| Full Load Losses | 50000 W |
| Impedane | 7 % |
| Type Of Connection | DYN11 (As Per Requirement ) |
| Tempreture In Oil | 40 Degree |
| Tempreture In Winding | 45 Degree |
Minimum order quantity: 1 Piece
- Oil-Cooled Distribution Transformer with OLTC – 2026 Description 1. General Overview:
An oil-cooled distribution transformer is designed to step down high voltage electricity for safe distribution to residential, commercial, or industrial users. The cooling is facilitated by mineral oil or synthetic ester fluids, which also serve as an insulating medium. The On-Load Tap Changer (OLTC) allows for voltage regulation under load without interrupting the power supply.
2. Key Features:| Feature | Description |
|---|---|
| Cooling Type | Oil-immersed (ONAN / ONAF) |
| Voltage Rating | Commonly from 11kV / 22kV / 33kV to 400V |
| Power Rating | Typically from 100 kVA to 5 MVA for distribution purposes |
| Tap Changer Type | On-Load Tap Changer (OLTC), motor-operated |
| Tap Range | ±10% in 1.25% steps (usually 17 steps total) |
| Insulating Medium | Mineral Oil / Synthetic Ester (Eco-friendly options available) |
| Cooling Class | ONAN (Oil Natural Air Natural) / ONAF (Oil Natural Air Forced) |
| Transformer Standard | IEC 60076 / IS 1180 / IS 2026 |
| Digital Integration | SCADA-compatible, IoT sensors, digital OLTC monitoring, DGA sensors |
-
Purpose: Regulates the output voltage in response to load variations, maintaining voltage within prescribed limits.
-
Operation: Operates under load via a motor-driven mechanism. Changes the tap position of the HV winding without power interruption.
-
Tap Changer Location: Usually installed in the HV side of the transformer.
-
Control System:
-
Tap Position Indicator
-
Automatic Voltage Regulator (AVR)
-
Motor Drive Unit (MDU)
-
Remote monitoring via SCADA/IoT in 2026 designs
-
-
Digital Tap Position Feedback
-
Smart sensors for temperature, oil level, gas analysis
-
Eco-friendly fluids for fire safety and biodegradability
-
Remote diagnostics and predictive maintenance
-
Integrated Buchholz relay, WTI, OTI, and PRD
-
Low-loss CRGO / amorphous metal cores
-
IoT-enabled OLTC actuator for advanced control
-
Utility power distribution networks
-
Renewable energy grid interfacing (solar, wind)
-
Industrial facilities requiring voltage regulation
-
Urban substations with load variability
1600 KVA Oil Cooled Type Distribution Transformer - OLTC ( As Per Is : 2026)
₹ 2128001 / Piece Get Latest Price
| Power Rating | 1600 KVA |
| KVA Capicity | 1600 KVA |
| Energy Lable | As Per Is : 2026 |
| Voltage ratio | 11 KV , 0.433 KV |
| Number of Phase | 3 Phase |
| Frequency | 50/60 HZ |
| Type of Installation | Indoor / Outdoor |
| Duty Cycle | Contionus |
| Types of Cooling | ONAN |
| Types of Tapechainger | OLTC |
| Tapping Range in + | 10% |
| Tapping Range in - | 10% |
| No Load Losses | 1792 W |
| Load Losses | 18208 W |
| Full Load Losses | 20000 W |
| Impedane | 6 % |
| Type of connection | DYN11 (As Per Requirement ) |
| Tempreture in Oil | 40 Degree |
| Tempreture in Winding | 45 Degree |
Minimum order quantity: 1 Piece
An oil-cooled distribution transformer is designed to step down high voltage electricity for safe distribution to residential, commercial, or industrial users. The cooling is facilitated by mineral oil or synthetic ester fluids, which also serve as an insulating medium. The On-Load Tap Changer (OLTC) allows for voltage regulation under load without interrupting the power supply.
2. Key Features:| Feature | Description |
|---|---|
| Cooling Type | Oil-immersed (ONAN / ONAF) |
| Voltage Rating | Commonly from 11kV / 22kV / 33kV to 400V |
| Power Rating | Typically from 100 kVA to 5 MVA for distribution purposes |
| Tap Changer Type | On-Load Tap Changer (OLTC), motor-operated |
| Tap Range | ±10% in 1.25% steps (usually 17 steps total) |
| Insulating Medium | Mineral Oil / Synthetic Ester (Eco-friendly options available) |
| Cooling Class | ONAN (Oil Natural Air Natural) / ONAF (Oil Natural Air Forced) |
| Transformer Standard | IEC 60076 / IS 1180 / IS 2026 |
| Digital Integration | SCADA-compatible, IoT sensors, digital OLTC monitoring, DGA sensors |
-
Purpose: Regulates the output voltage in response to load variations, maintaining voltage within prescribed limits.
-
Operation: Operates under load via a motor-driven mechanism. Changes the tap position of the HV winding without power interruption.
-
Tap Changer Location: Usually installed in the HV side of the transformer.
-
Control System:
-
Tap Position Indicator
-
Automatic Voltage Regulator (AVR)
-
Motor Drive Unit (MDU)
-
Remote monitoring via SCADA/IoT in 2026 designs
-
-
Digital Tap Position Feedback
-
Smart sensors for temperature, oil level, gas analysis
-
Eco-friendly fluids for fire safety and biodegradability
-
Remote diagnostics and predictive maintenance
-
Integrated Buchholz relay, WTI, OTI, and PRD
-
Low-loss CRGO / amorphous metal cores
-
IoT-enabled OLTC actuator for advanced control
-
Utility power distribution networks
-
Renewable energy grid interfacing (solar, wind)
-
Industrial facilities requiring voltage regulation
-
Urban substations with load variability
2500 KVA Oil Cooled Type Distribution Transformer - OLTC ( As Per Is : 2026)
₹ 2740000 / Piece Get Latest Price
| Power Rating | 2500 KVA |
| KVA Capicity | 2500 KVA |
| Energy Lable | As Per Is : 2026 |
| Voltage ratio | 11 KV , 0.433 KV |
| Number of Phase | 3 Phase |
| Frequency | 50/60 HZ |
| Type of Installation | Indoor / Outdoor |
| Duty Cycle | Contionus |
| Types of Cooling | ONAN |
| Types of Tapechainger | OLTC |
| Tapping Range in + | 10 % |
| Tapping Range in - | 10 % |
| No Load Losses | 2600 W |
| Load Losses | 24900 W |
| Full Load Losses | 27500 W |
| Impedane | 6 % |
| Type of connection | DYN11 (As Per Requirement ) |
| Tempreture in Oil | 40 Degree |
| Tempreture in Winding | 45 Degree |
Minimum order quantity: 1 Piece
An oil-cooled distribution transformer is designed to step down high voltage electricity for safe distribution to residential, commercial, or industrial users. The cooling is facilitated by mineral oil or synthetic ester fluids, which also serve as an insulating medium. The On-Load Tap Changer (OLTC) allows for voltage regulation under load without interrupting the power supply.
2. Key Features:| Feature | Description |
|---|---|
| Cooling Type | Oil-immersed (ONAN / ONAF) |
| Voltage Rating | Commonly from 11kV / 22kV / 33kV to 400V |
| Power Rating | Typically from 100 kVA to 5 MVA for distribution purposes |
| Tap Changer Type | On-Load Tap Changer (OLTC), motor-operated |
| Tap Range | ±10% in 1.25% steps (usually 17 steps total) |
| Insulating Medium | Mineral Oil / Synthetic Ester (Eco-friendly options available) |
| Cooling Class | ONAN (Oil Natural Air Natural) / ONAF (Oil Natural Air Forced) |
| Transformer Standard | IEC 60076 / IS 1180 / IS 2026 |
| Digital Integration | SCADA-compatible, IoT sensors, digital OLTC monitoring, DGA sensors |
-
Purpose: Regulates the output voltage in response to load variations, maintaining voltage within prescribed limits.
-
Operation: Operates under load via a motor-driven mechanism. Changes the tap position of the HV winding without power interruption.
-
Tap Changer Location: Usually installed in the HV side of the transformer.
-
Control System:
-
Tap Position Indicator
-
Automatic Voltage Regulator (AVR)
-
Motor Drive Unit (MDU)
-
Remote monitoring via SCADA/IoT in 2026 designs
-
-
Digital Tap Position Feedback
-
Smart sensors for temperature, oil level, gas analysis
-
Eco-friendly fluids for fire safety and biodegradability
-
Remote diagnostics and predictive maintenance
-
Integrated Buchholz relay, WTI, OTI, and PRD
-
Low-loss CRGO / amorphous metal cores
-
IoT-enabled OLTC actuator for advanced control
-
Utility power distribution networks
-
Renewable energy grid interfacing (solar, wind)
-
Industrial facilities requiring voltage regulation
-
Urban substations with load variability
3000 KVA Oil Cooled Type Distribution Transformer - OCTG ( As Per Is : 2026)
₹ 2676000 / Piece Get Latest Price
| Power Rating | 3000 KVA |
| KVA Capicity | 3000 KVA |
| Energy Lable | As Per Is : 2026 |
| Voltage ratio | 11 KV , 0.433 KV |
| Number of Phase | 3 Phase |
| Frequency | 50/60 HZ |
| Type of Installation | Indoore / Outdoore |
| Duty Cycle | Contionus |
| Types of Cooling | ONAN |
| Types of Tapechainger | OCTC |
| Tapping Range in + | 5 % |
| Tapping Range in - | 5 % |
| No Load Losses | 3000 W |
| Load Losses | 30000 W |
| Full Load Losses | 33000 W |
| Impidence | 6 % |
| Type of connection | DYN11 (As Per Requirement ) |
| Tempreture in Oil | 40 Degree |
| Tempreture in Winding | 45 Degree |
Minimum order quantity: 1 Piece
-
IS 2026 is the Indian Standard titled “Power Transformers” (multiple parts) which lays down design, construction, testing, and performance requirements for oil‑immersed (liquid‑immersed) power and distribution transformers.
-
There are also related standards: IS 1180 (for distribution transformers), IS 335 (for transformer oil), etc. These complement IS 2026.
Here are the usual components and features of oil‑cooled transformers meeting IS 2026:
| Component | Description / Requirement |
|---|---|
| Core | Built from cold‑rolled, grain‑oriented silicon steel laminations. Stamped sheets. Coated/insulated to resist oil and high temperature. Core limbs bound tightly; proper yokes; mechanical clamping to avoid vibration and core losses. |
| Windings | High‐tension (HT) and low‐tension (LT) windings. Usually cylindrical / helical for LT; paper‑covered conductors; sometimes disc type for large ratings. Insulation between turns and layers per relevant impulse withstand levels. Spacers and support to hold windings rigid. |
| Insulation | Use of pressboard, kraft paper, etc. For oil impregnation. Insulation must be rated for thermal stresses and aging. Oil used must comply with IS 335 (mineral oil) or other approved insulating fluids (like synthetic/natural esters) if agreed. |
| Oil / Insulating Liquid | Mineral insulating oil is standard. Must meet dielectric strength, viscosity, flash & fire point, chemical properties as per IS 335. In some newer / eco designs, ester oil or other fluid may be used. First filling, oil sampling, pre‑testing. Oil also used to cool and insulate. |
| Cooling System | Natural oil circulation (ONAN) is common for many distribution and medium sized power transformers. For larger ratings, forced cooling (forced oil, forced air), radiators, corrugated tanks, etc. Temperature rise limits are prescribed. |
| Tap Changers / Tappings | OCTC or OLTC depending on requirement. Taps to allow adjustment for voltage variation. Commonly ±5% in steps of 2.5% or similar. |
| Temperature Rise Limits | The standard prescribes limits for winding temperature (by resistance method) and top oil temperature (by thermometer) for given cooling mode (e.g., ONAN). For many ratings (e.g. common distribution transformers), winding rise ≈ 40‑50 °C, top oil ≈ 35‑45 °C, etc., depending on voltage class and rating. |
| Losses (No‐load & Load Losses) | Must be within prescribed limits. IS standards give maximum permissible values. Manufacturers strive for low core loss (no‑load loss) and lower load loss to improve efficiency. Sometimes star rating levels or efficiency classes are defined. |
-
Power utility‑step down at substations
-
Distribution to residential/commercial/industrial loads
-
Renewable energy plants (solar, wind) connecting to grid
-
Industrial plants needing reliable voltage transformation
-
Locations where safety / fire risk / environmental regulations demand safer insulating fluids
3000 KVA Oil Cooled Type Distribution Transformer - OLTC ( As Per Is : 2026)
₹ 3048000 / Piece Get Latest Price
| Power Rating | 3000 KVA |
| KVA Capicity | 3000 KVA |
| Energy Lable | As Per Is : 2026 |
| Voltage ratio | 11 KV , 0.433 KV |
| Number of Phase | 3 Phase |
| Frequency | 50/60 HZ |
| Type of Installation | Indoor / Outdoor |
| Duty Cycle | Contionus |
| Types of Cooling | ONAN |
| Types of Tapechainger | OLTC |
| Tapping Range in + | 10 % |
| Tapping Range in - | 10 % |
| No Load Losses | 3000 w |
| Load Losses | 30000 W |
| Full Load Losses | 33000 W |
| Impedane | 6 % |
| Type of connection | DYN11 (As Per Requirement ) |
| Tempreture in Oil | 40 Degree |
| Tempreture in Winding | 45 Degree |
Minimum order quantity: 1 Piece
An oil-cooled distribution transformer is designed to step down high voltage electricity for safe distribution to residential, commercial, or industrial users. The cooling is facilitated by mineral oil or synthetic ester fluids, which also serve as an insulating medium. The On-Load Tap Changer (OLTC) allows for voltage regulation under load without interrupting the power supply.
2. Key Features:| Feature | Description |
|---|---|
| Cooling Type | Oil-immersed (ONAN / ONAF) |
| Voltage Rating | Commonly from 11kV / 22kV / 33kV to 400V |
| Power Rating | Typically from 100 kVA to 5 MVA for distribution purposes |
| Tap Changer Type | On-Load Tap Changer (OLTC), motor-operated |
| Tap Range | ±10% in 1.25% steps (usually 17 steps total) |
| Insulating Medium | Mineral Oil / Synthetic Ester (Eco-friendly options available) |
| Cooling Class | ONAN (Oil Natural Air Natural) / ONAF (Oil Natural Air Forced) |
| Transformer Standard | IEC 60076 / IS 1180 / IS 2026 |
| Digital Integration | SCADA-compatible, IoT sensors, digital OLTC monitoring, DGA sensors |
-
Purpose: Regulates the output voltage in response to load variations, maintaining voltage within prescribed limits.
-
Operation: Operates under load via a motor-driven mechanism. Changes the tap position of the HV winding without power interruption.
-
Tap Changer Location: Usually installed in the HV side of the transformer.
-
Control System:
-
Tap Position Indicator
-
Automatic Voltage Regulator (AVR)
-
Motor Drive Unit (MDU)
-
Remote monitoring via SCADA/IoT in 2026 designs
-
-
Digital Tap Position Feedback
-
Smart sensors for temperature, oil level, gas analysis
-
Eco-friendly fluids for fire safety and biodegradability
-
Remote diagnostics and predictive maintenance
-
Integrated Buchholz relay, WTI, OTI, and PRD
-
Low-loss CRGO / amorphous metal cores
-
IoT-enabled OLTC actuator for advanced control
-
Utility power distribution networks
-
Renewable energy grid interfacing (solar, wind)
-
Industrial facilities requiring voltage regulation
-
Urban substations with load variability
3250 KVA Oil Cooled Type Distribution Transformer - OCTG ( As Per Is : 2026)
₹ 2939500 / Piece Get Latest Price
| Power Rating | 3250 KVA |
| KVA Capicity | 3250 KVA |
| Energy Lable | As Per Is :2026 |
| Voltage ratio | 11 KV , 0.433 KV |
| Number of Phase | 3 Phase |
| Frequency | 50/60 HZ |
| Type of Installation | Indoore / Outdoore |
| Duty Cycle | Contionus |
| Types of Cooling | ONAN |
| Types of Tapechainger | OCTC |
| Tapping Range in + | 5 % |
| Tapping Range in - | 5 % |
| No Load Losses | 3250 W |
| Load Losses | 32500 W |
| Full Load Losses | 35750 W |
| Impidence | 7 % |
| Type of connection | DYN11 (As Per Requirement ) |
| Tempreture in Oil | 40 Degree |
| Tempreture in Winding | 45 Degree |
Minimum order quantity: 1 Piece
-
IS 2026 is the Indian Standard titled “Power Transformers” (multiple parts) which lays down design, construction, testing, and performance requirements for oil‑immersed (liquid‑immersed) power and distribution transformers.
-
There are also related standards: IS 1180 (for distribution transformers), IS 335 (for transformer oil), etc. These complement IS 2026.
Here are the usual components and features of oil‑cooled transformers meeting IS 2026:
| Component | Description / Requirement |
|---|---|
| Core | Built from cold‑rolled, grain‑oriented silicon steel laminations. Stamped sheets. Coated/insulated to resist oil and high temperature. Core limbs bound tightly; proper yokes; mechanical clamping to avoid vibration and core losses. |
| Windings | High‐tension (HT) and low‐tension (LT) windings. Usually cylindrical / helical for LT; paper‑covered conductors; sometimes disc type for large ratings. Insulation between turns and layers per relevant impulse withstand levels. Spacers and support to hold windings rigid. |
| Insulation | Use of pressboard, kraft paper, etc. For oil impregnation. Insulation must be rated for thermal stresses and aging. Oil used must comply with IS 335 (mineral oil) or other approved insulating fluids (like synthetic/natural esters) if agreed. |
| Oil / Insulating Liquid | Mineral insulating oil is standard. Must meet dielectric strength, viscosity, flash & fire point, chemical properties as per IS 335. In some newer / eco designs, ester oil or other fluid may be used. First filling, oil sampling, pre‑testing. Oil also used to cool and insulate. |
| Cooling System | Natural oil circulation (ONAN) is common for many distribution and medium sized power transformers. For larger ratings, forced cooling (forced oil, forced air), radiators, corrugated tanks, etc. Temperature rise limits are prescribed. |
| Tap Changers / Tappings | OCTC or OLTC depending on requirement. Taps to allow adjustment for voltage variation. Commonly ±5% in steps of 2.5% or similar. |
| Temperature Rise Limits | The standard prescribes limits for winding temperature (by resistance method) and top oil temperature (by thermometer) for given cooling mode (e.g., ONAN). For many ratings (e.g. common distribution transformers), winding rise ≈ 40‑50 °C, top oil ≈ 35‑45 °C, etc., depending on voltage class and rating. |
| Losses (No‐load & Load Losses) | Must be within prescribed limits. IS standards give maximum permissible values. Manufacturers strive for low core loss (no‑load loss) and lower load loss to improve efficiency. Sometimes star rating levels or efficiency classes are defined. |
-
Power utility‑step down at substations
-
Distribution to residential/commercial/industrial loads
-
Renewable energy plants (solar, wind) connecting to grid
-
Industrial plants needing reliable voltage transformation
-
Locations where safety / fire risk / environmental regulations demand safer insulating fluids
3250 KVA Oil Cooled Type Distribution Transformer - OLTC ( As Per Is : 2026)
₹ 3296000 / Piece Get Latest Price
| Power Rating | 3250 KVA |
| KVA Capicity | 3250 KVA |
| Energy Lable | As Per Is : 2026 |
| Voltage ratio | 11 KV , 0.433 KV |
| Number of Phase | 3 Phase |
| Frequency | 50/60 HZ |
| Type of Installation | Indoor / Outdoor |
| Duty Cycle | Contionus |
| Types of Cooling | ONAN |
| Types of Tapechainger | OLTC |
| Tapping Range in + | 10 % |
| Tapping Range in - | 10 % |
| No Load Losses | 3250 W |
| Load Losses | 32500 W |
| Full Load Losses | 35750 W |
| Impedane | 7 % |
| Type of connection | DYN11 (As Per Requirement ) |
| Tempreture in Oil | 40 Degree |
| Tempreture in Winding | 45 Degree |
Minimum order quantity: 1 Piece
An oil-cooled distribution transformer is designed to step down high voltage electricity for safe distribution to residential, commercial, or industrial users. The cooling is facilitated by mineral oil or synthetic ester fluids, which also serve as an insulating medium. The On-Load Tap Changer (OLTC) allows for voltage regulation under load without interrupting the power supply.
2. Key Features:| Feature | Description |
|---|---|
| Cooling Type | Oil-immersed (ONAN / ONAF) |
| Voltage Rating | Commonly from 11kV / 22kV / 33kV to 400V |
| Power Rating | Typically from 100 kVA to 5 MVA for distribution purposes |
| Tap Changer Type | On-Load Tap Changer (OLTC), motor-operated |
| Tap Range | ±10% in 1.25% steps (usually 17 steps total) |
| Insulating Medium | Mineral Oil / Synthetic Ester (Eco-friendly options available) |
| Cooling Class | ONAN (Oil Natural Air Natural) / ONAF (Oil Natural Air Forced) |
| Transformer Standard | IEC 60076 / IS 1180 / IS 2026 |
| Digital Integration | SCADA-compatible, IoT sensors, digital OLTC monitoring, DGA sensors |
-
Purpose: Regulates the output voltage in response to load variations, maintaining voltage within prescribed limits.
-
Operation: Operates under load via a motor-driven mechanism. Changes the tap position of the HV winding without power interruption.
-
Tap Changer Location: Usually installed in the HV side of the transformer.
-
Control System:
-
Tap Position Indicator
-
Automatic Voltage Regulator (AVR)
-
Motor Drive Unit (MDU)
-
Remote monitoring via SCADA/IoT in 2026 designs
-
-
Digital Tap Position Feedback
-
Smart sensors for temperature, oil level, gas analysis
-
Eco-friendly fluids for fire safety and biodegradability
-
Remote diagnostics and predictive maintenance
-
Integrated Buchholz relay, WTI, OTI, and PRD
-
Low-loss CRGO / amorphous metal cores
-
IoT-enabled OLTC actuator for advanced control
-
Utility power distribution networks
-
Renewable energy grid interfacing (solar, wind)
-
Industrial facilities requiring voltage regulation
-
Urban substations with load variability
4000 KVA Oil Cooled Type Distribution Transformer - OLTC ( As Per Is : 2026)
₹ 3713000 / Piece Get Latest Price
| Power Rating | 4000 KVA |
| KVA Capicity | 4000 KVA |
| Energy Lable | As Per Is : 2026 |
| Voltage ratio | 11 KV , 0.433 KV |
| Number of Phase | 3 Phase |
| Frequency | 50/60 HZ |
| Type of Installation | Indoor / Outdoor |
| Duty Cycle | Contionus |
| Types of Cooling | ONAN |
| Types of Tapechainger | OLTC |
| Tapping Range in + | 10% |
| Tapping Range in - | 10% |
| No Load Losses | 3600 W |
| Load Losses | 40000 W |
| Full Load Losses | 43600 W |
| Impedane | 7 % |
| Type of connection | DYN11 (As Per Requirement ) |
| Tempreture in Oil | 40 Degree |
| Tempreture in Winding | 45 Degree |
An oil-cooled distribution transformer is designed to step down high voltage electricity for safe distribution to residential, commercial, or industrial users. The cooling is facilitated by mineral oil or synthetic ester fluids, which also serve as an insulating medium. The On-Load Tap Changer (OLTC) allows for voltage regulation under load without interrupting the power supply.
2. Key Features:| Feature | Description |
|---|---|
| Cooling Type | Oil-immersed (ONAN / ONAF) |
| Voltage Rating | Commonly from 11kV / 22kV / 33kV to 400V |
| Power Rating | Typically from 100 kVA to 5 MVA for distribution purposes |
| Tap Changer Type | On-Load Tap Changer (OLTC), motor-operated |
| Tap Range | ±10% in 1.25% steps (usually 17 steps total) |
| Insulating Medium | Mineral Oil / Synthetic Ester (Eco-friendly options available) |
| Cooling Class | ONAN (Oil Natural Air Natural) / ONAF (Oil Natural Air Forced) |
| Transformer Standard | IEC 60076 / IS 1180 / IS 2026 |
| Digital Integration | SCADA-compatible, IoT sensors, digital OLTC monitoring, DGA sensors |
-
Purpose: Regulates the output voltage in response to load variations, maintaining voltage within prescribed limits.
-
Operation: Operates under load via a motor-driven mechanism. Changes the tap position of the HV winding without power interruption.
-
Tap Changer Location: Usually installed in the HV side of the transformer.
-
Control System:
-
Tap Position Indicator
-
Automatic Voltage Regulator (AVR)
-
Motor Drive Unit (MDU)
-
Remote monitoring via SCADA/IoT in 2026 designs
-
-
Digital Tap Position Feedback
-
Smart sensors for temperature, oil level, gas analysis
-
Eco-friendly fluids for fire safety and biodegradability
-
Remote diagnostics and predictive maintenance
-
Integrated Buchholz relay, WTI, OTI, and PRD
-
Low-loss CRGO / amorphous metal cores
-
IoT-enabled OLTC actuator for advanced control
-
Utility power distribution networks
-
Renewable energy grid interfacing (solar, wind)
-
Industrial facilities requiring voltage regulation
-
Urban substations with load variability
2000 KVA Oil Cooled Type Distribution Transformer - OLTC ( As Per Is : 2026)
₹ 2407000 / Piece Get Latest Price
| Power Rating | 2000 KVA |
| Energy Lable | As Per Is : 2026 |
| Voltage ratio | 11 KV , 0.433 KV |
| Number of Phase | 3 Phase |
| Frequency | 50/60 HZ |
| Type of Installation | Indoor / Outdoor |
| Duty Cycle | Contionus |
| Types of Cooling | ONAN |
| Types of Tapechainger | OLTC |
| Tapping Range in + | 10 % |
| Tapping Range in - | 10 % |
| No Load Losses | 2200 W |
| Load Losses | 22000 W |
| Full Load Losses | 24200 W |
| Impedane | 6 % |
| Type of connection | DYN11 (As Per Requirement ) |
| Tempreture in Oil | 40 Degree |
| Tempreture in Winding | 45 Degree |
Minimum order quantity: 1 Piece
An oil-cooled distribution transformer is designed to step down high voltage electricity for safe distribution to residential, commercial, or industrial users. The cooling is facilitated by mineral oil or synthetic ester fluids, which also serve as an insulating medium. The On-Load Tap Changer (OLTC) allows for voltage regulation under load without interrupting the power supply.
2. Key Features:| Feature | Description |
|---|---|
| Cooling Type | Oil-immersed (ONAN / ONAF) |
| Voltage Rating | Commonly from 11kV / 22kV / 33kV to 400V |
| Power Rating | Typically from 100 kVA to 5 MVA for distribution purposes |
| Tap Changer Type | On-Load Tap Changer (OLTC), motor-operated |
| Tap Range | ±10% in 1.25% steps (usually 17 steps total) |
| Insulating Medium | Mineral Oil / Synthetic Ester (Eco-friendly options available) |
| Cooling Class | ONAN (Oil Natural Air Natural) / ONAF (Oil Natural Air Forced) |
| Transformer Standard | IEC 60076 / IS 1180 / IS 2026 |
| Digital Integration | SCADA-compatible, IoT sensors, digital OLTC monitoring, DGA sensors |
-
Purpose: Regulates the output voltage in response to load variations, maintaining voltage within prescribed limits.
-
Operation: Operates under load via a motor-driven mechanism. Changes the tap position of the HV winding without power interruption.
-
Tap Changer Location: Usually installed in the HV side of the transformer.
-
Control System:
-
Tap Position Indicator
-
Automatic Voltage Regulator (AVR)
-
Motor Drive Unit (MDU)
-
Remote monitoring via SCADA/IoT in 2026 designs
-
-
Digital Tap Position Feedback
-
Smart sensors for temperature, oil level, gas analysis
-
Eco-friendly fluids for fire safety and biodegradability
-
Remote diagnostics and predictive maintenance
-
Integrated Buchholz relay, WTI, OTI, and PRD
-
Low-loss CRGO / amorphous metal cores
-
IoT-enabled OLTC actuator for advanced control
-
Utility power distribution networks
-
Renewable energy grid interfacing (solar, wind)
-
Industrial facilities requiring voltage regulation
-
Urban substations with load variability
2000 KVA Oil Cooled Type Distribution Transformer - OCTG ( As Per Is : 2026)
₹ 2078000 / Piece Get Latest Price
| Power Rating | 2000 KVA |
| KVA Capicity | 2000 KVA |
| Energy Lable | As Per Is : 2026 |
| Voltage ratio | 11 KV , 0.433 KV |
| Number of Phase | 3 Phase |
| Frequency | 50/60 HZ |
| Type of Installation | Indoore / Outdoore |
| Duty Cycle | Contionus |
| Types of Cooling | ONAN |
| Types of Tapechainger | OCTC |
| Tapping Range in + | 5 % |
| Tapping Range in - | 5 % |
| No Load Losses | 2000 W |
| Load Losses | 24200 W |
| Full Load Losses | 24200 W |
| Impidence | 6 % |
| Type of connection | DYN11 (As Per Requirement ) |
| Tempreture in Oil | 40 Degree |
| Tempreture in Winding | 45 Degree |
Minimum order quantity: 1 Piece
-
IS 2026 is the Indian Standard titled “Power Transformers” (multiple parts) which lays down design, construction, testing, and performance requirements for oil‑immersed (liquid‑immersed) power and distribution transformers.
-
There are also related standards: IS 1180 (for distribution transformers), IS 335 (for transformer oil), etc. These complement IS 2026.
Here are the usual components and features of oil‑cooled transformers meeting IS 2026:
| Component | Description / Requirement |
|---|---|
| Core | Built from cold‑rolled, grain‑oriented silicon steel laminations. Stamped sheets. Coated/insulated to resist oil and high temperature. Core limbs bound tightly; proper yokes; mechanical clamping to avoid vibration and core losses. |
| Windings | High‐tension (HT) and low‐tension (LT) windings. Usually cylindrical / helical for LT; paper‑covered conductors; sometimes disc type for large ratings. Insulation between turns and layers per relevant impulse withstand levels. Spacers and support to hold windings rigid. |
| Insulation | Use of pressboard, kraft paper, etc. For oil impregnation. Insulation must be rated for thermal stresses and aging. Oil used must comply with IS 335 (mineral oil) or other approved insulating fluids (like synthetic/natural esters) if agreed. |
| Oil / Insulating Liquid | Mineral insulating oil is standard. Must meet dielectric strength, viscosity, flash & fire point, chemical properties as per IS 335. In some newer / eco designs, ester oil or other fluid may be used. First filling, oil sampling, pre‑testing. Oil also used to cool and insulate. |
| Cooling System | Natural oil circulation (ONAN) is common for many distribution and medium sized power transformers. For larger ratings, forced cooling (forced oil, forced air), radiators, corrugated tanks, etc. Temperature rise limits are prescribed. |
| Tap Changers / Tappings | OCTC or OLTC depending on requirement. Taps to allow adjustment for voltage variation. Commonly ±5% in steps of 2.5% or similar. |
| Temperature Rise Limits | The standard prescribes limits for winding temperature (by resistance method) and top oil temperature (by thermometer) for given cooling mode (e.g., ONAN). For many ratings (e.g. common distribution transformers), winding rise ≈ 40‑50 °C, top oil ≈ 35‑45 °C, etc., depending on voltage class and rating. |
| Losses (No‐load & Load Losses) | Must be within prescribed limits. IS standards give maximum permissible values. Manufacturers strive for low core loss (no‑load loss) and lower load loss to improve efficiency. Sometimes star rating levels or efficiency classes are defined. |
-
Power utility‑step down at substations
-
Distribution to residential/commercial/industrial loads
-
Renewable energy plants (solar, wind) connecting to grid
-
Industrial plants needing reliable voltage transformation
-
Locations where safety / fire risk / environmental regulations demand safer insulating fluids
4500 KVA Oil Cooled Type Distribution Transformer - OCTG ( As Per Is : 2026)
₹ 3663000 / Piece Get Latest Price
| Power Rating | 4500 KVA |
| KVA Capicity | 4500 KVA |
| Energy Lable | As Per Is : 2026 |
| Voltage ratio | 11 KV , 0.433 KV |
| Number of Phase | 3 Phase |
| Frequency | 50/60 HZ |
| Type of Installation | Indoor / Outdoore |
| Duty Cycle | Contionus |
| Types of Cooling | ONAN |
| Types of Tapechainger | OCTC |
| Tapping Range in + | 5 % |
| Tapping Range in - | 5 % |
| No Load Losses | 3825 W |
| Load Losses | 42750 W |
| Full Load Losses | 46575 W |
| Impidence | 7 % |
| Type of connection | DYN11 (As Per Requirement ) |
| Tempreture in Oil | 40 Degree |
| Tempreture in Winding | 45 Degree |
Minimum order quantity: 1 Piece
What is IS‑2026
Here are the usual components and features of oil‑cooled transformers meeting IS 2026:
|
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250 KVA Oil Cooled Type Distribution Transformer - OLTC ( As Per Is : 2026)
₹ 915000 / Piece Get Latest Price
| Power Rating | 250 KVA |
| KVA Capicity | 250 KVA |
| Energy Lable | As Per Is 2026 |
| Voltage ratio | 11 KV , 0.433 KV |
| Number of Phase | 3 Phase |
| Frequency | 50/60 HZ |
| Type of Installation | Indoor / Outdoor |
| Duty Cycle | Contionus |
| Types of Cooling | ONAN |
| Types of Tapechainger | OLTC |
| Tapping Range in + | 10 % |
| Tapping Range in - | 10 % |
| No Load Losses | 500 w |
| Load Losses | 4500 w |
| Full Load Losses | 5000 w |
| Impedane | 4.5 % |
| Type of connection | DYN11 (As Per Requirement ) |
| Tempreture in Oil | 40 Degree |
| Tempreture in Winding | 45 Degree |
Minimum order quantity: 1 Piece
An oil-cooled distribution transformer is designed to step down high voltage electricity for safe distribution to residential, commercial, or industrial users. The cooling is facilitated by mineral oil or synthetic ester fluids, which also serve as an insulating medium. The On-Load Tap Changer (OLTC) allows for voltage regulation under load without interrupting the power supply.
2. Key Features:| Feature | Description |
|---|---|
| Cooling Type | Oil-immersed (ONAN / ONAF) |
| Voltage Rating | Commonly from 11kV / 22kV / 33kV to 400V |
| Power Rating | Typically from 100 kVA to 5 MVA for distribution purposes |
| Tap Changer Type | On-Load Tap Changer (OLTC), motor-operated |
| Tap Range | ±10% in 1.25% steps (usually 17 steps total) |
| Insulating Medium | Mineral Oil / Synthetic Ester (Eco-friendly options available) |
| Cooling Class | ONAN (Oil Natural Air Natural) / ONAF (Oil Natural Air Forced) |
| Transformer Standard | IEC 60076 / IS 1180 / IS 2026 |
| Digital Integration | SCADA-compatible, IoT sensors, digital OLTC monitoring, DGA sensors |
-
Purpose: Regulates the output voltage in response to load variations, maintaining voltage within prescribed limits.
-
Operation: Operates under load via a motor-driven mechanism. Changes the tap position of the HV winding without power interruption.
-
Tap Changer Location: Usually installed in the HV side of the transformer.
-
Control System:
-
Tap Position Indicator
-
Automatic Voltage Regulator (AVR)
-
Motor Drive Unit (MDU)
-
Remote monitoring via SCADA/IoT in 2026 designs
-
-
Digital Tap Position Feedback
-
Smart sensors for temperature, oil level, gas analysis
-
Eco-friendly fluids for fire safety and biodegradability
-
Remote diagnostics and predictive maintenance
-
Integrated Buchholz relay, WTI, OTI, and PRD
-
Low-loss CRGO / amorphous metal cores
-
IoT-enabled OLTC actuator for advanced control
-
Utility power distribution networks
-
Renewable energy grid interfacing (solar, wind)
-
Industrial facilities requiring voltage regulation
-
Urban substations with load variability
250 KVA Oil Cooled Type Distribution Transformer
₹ 700000 / Piece Get Latest Price
| Power Rating | 250kVA |
| Number of Phase | 3-Phase |
| Cooling Type | Oil Cooled |
| Short circuit impedance | 4.50 % |
| Manufactured By | KAY PEE |
| Reference Standard | IS 1180 |
| Standards | IS-1180 |
| Coil Structure | Copper |
| Energy Efficiency Level | LEVEL 1 |
| Insulation Class | A |
Minimum order quantity: 01 Piece
500 KVA Oil Cooled Type Distribution Transformer - OLTC ( As Per Is : 2026)
₹ 1163000 / Piece Get Latest Price
| Power Rating | 500 KVA |
| KVA Capacity | 500 KVA |
| Energy Lable | As Per Is : 2026 |
| Voltage Ratio | 11 / 0.433 KV |
| Number Of Phase | 3 Phase |
| Frequency | 50/60 HZ |
| Type Of Installation | Indoor / Outdoor |
| Duty Cycle | Contionus |
| Types Of Cooling | ONAN |
| Types Of Tap Changer | OLTC |
| Tapping Range in + | 10 % |
| Tapping Range in - | 10 % |
| No Load Losses | 825 W |
| Load Losses | 7250 W |
| Full Load Losses | 8075 W |
| Impedane | 4.5 % |
| Type Of Connection | DYN11 (As Per Requirement ) |
| Tempreture In Oil | 40 Degree |
| Tempreture In Winding | 45 Degree |
Minimum order quantity: 1 Piece
An oil-cooled distribution transformer is designed to step down high voltage electricity for safe distribution to residential, commercial, or industrial users. The cooling is facilitated by mineral oil or synthetic ester fluids, which also serve as an insulating medium. The On-Load Tap Changer (OLTC) allows for voltage regulation under load without interrupting the power supply.
2. Key Features:| Feature | Description |
|---|---|
| Cooling Type | Oil-immersed (ONAN / ONAF) |
| Voltage Rating | Commonly from 11kV / 22kV / 33kV to 400V |
| Power Rating | Typically from 100 kVA to 5 MVA for distribution purposes |
| Tap Changer Type | On-Load Tap Changer (OLTC), motor-operated |
| Tap Range | ±10% in 1.25% steps (usually 17 steps total) |
| Insulating Medium | Mineral Oil / Synthetic Ester (Eco-friendly options available) |
| Cooling Class | ONAN (Oil Natural Air Natural) / ONAF (Oil Natural Air Forced) |
| Transformer Standard | IEC 60076 / IS 1180 / IS 2026 |
| Digital Integration | SCADA-compatible, IoT sensors, digital OLTC monitoring, DGA sensors |
-
Purpose: Regulates the output voltage in response to load variations, maintaining voltage within prescribed limits.
-
Operation: Operates under load via a motor-driven mechanism. Changes the tap position of the HV winding without power interruption.
-
Tap Changer Location: Usually installed in the HV side of the transformer.
-
Control System:
-
Tap Position Indicator
-
Automatic Voltage Regulator (AVR)
-
Motor Drive Unit (MDU)
-
Remote monitoring via SCADA/IoT in 2026 designs
-
-
Digital Tap Position Feedback
-
Smart sensors for temperature, oil level, gas analysis
-
Eco-friendly fluids for fire safety and biodegradability
-
Remote diagnostics and predictive maintenance
-
Integrated Buchholz relay, WTI, OTI, and PRD
-
Low-loss CRGO / amorphous metal cores
-
IoT-enabled OLTC actuator for advanced control
-
Utility power distribution networks
-
Renewable energy grid interfacing (solar, wind)
-
Industrial facilities requiring voltage regulation
-
Urban substations with load variability
750 KVA Oil Cooled Type Distribution Transformer - OLTC ( As Per Is : 2026)
₹ 1422000 / Piece Get Latest Price
| Power Rating | 750 KVA |
| KVA Capacity | 750 KVA |
| Energy Lable | As Per Is : 2026 |
| Voltage Ratio | 11 / 0.433 KV |
| Number Of Phase | 3 Phase |
| Frequency | 50/60 HZ |
| Type Of Installation | Indoor / Outdoor |
| Duty Cycle | Contionus |
| Types Of Cooling | ONAN |
| Types Of Tap Changer | OLTC |
| Tapping Range in + | 10 % |
| Tapping Range in - | 10 % |
| No Load Losses | 1125 W |
| Load Losses | 9375 W |
| Full Load Losses | 10500 W |
| Impedane | 4.5 % |
| Type Of Connection | DYN11 (As Per Requirement ) |
| Tempreture In Oil | 40 Degree |
| Tempreture In Winding | 45 Degree |
Minimum order quantity: 1 Piece
An oil-cooled distribution transformer is designed to step down high voltage electricity for safe distribution to residential, commercial, or industrial users. The cooling is facilitated by mineral oil or synthetic ester fluids, which also serve as an insulating medium. The On-Load Tap Changer (OLTC) allows for voltage regulation under load without interrupting the power supply.
2. Key Features:| Feature | Description |
|---|---|
| Cooling Type | Oil-immersed (ONAN / ONAF) |
| Voltage Rating | Commonly from 11kV / 22kV / 33kV to 400V |
| Power Rating | Typically from 100 kVA to 5 MVA for distribution purposes |
| Tap Changer Type | On-Load Tap Changer (OLTC), motor-operated |
| Tap Range | ±10% in 1.25% steps (usually 17 steps total) |
| Insulating Medium | Mineral Oil / Synthetic Ester (Eco-friendly options available) |
| Cooling Class | ONAN (Oil Natural Air Natural) / ONAF (Oil Natural Air Forced) |
| Transformer Standard | IEC 60076 / IS 1180 / IS 2026 |
| Digital Integration | SCADA-compatible, IoT sensors, digital OLTC monitoring, DGA sensors |
-
Purpose: Regulates the output voltage in response to load variations, maintaining voltage within prescribed limits.
-
Operation: Operates under load via a motor-driven mechanism. Changes the tap position of the HV winding without power interruption.
-
Tap Changer Location: Usually installed in the HV side of the transformer.
-
Control System:
-
Tap Position Indicator
-
Automatic Voltage Regulator (AVR)
-
Motor Drive Unit (MDU)
-
Remote monitoring via SCADA/IoT in 2026 designs
-
-
Digital Tap Position Feedback
-
Smart sensors for temperature, oil level, gas analysis
-
Eco-friendly fluids for fire safety and biodegradability
-
Remote diagnostics and predictive maintenance
-
Integrated Buchholz relay, WTI, OTI, and PRD
-
Low-loss CRGO / amorphous metal cores
-
IoT-enabled OLTC actuator for advanced control
-
Utility power distribution networks
-
Renewable energy grid interfacing (solar, wind)
-
Industrial facilities requiring voltage regulation
-
Urban substations with load variability
1500 KVA Oil Cooled Type Distribution Transformer - OCTC ( As Per Is : 2026)
₹ 1704000 / Piece Get Latest Price
| Power Rating | 1500 KVA |
| KVA Capicity | 1500 KVA |
| Energy Lable | As Per Is : 2026 |
| Voltage ratio | 11 KV , 0.433 KV |
| Number of Phase | 3 Phase |
| Frequency | 50/60 HZ |
| Type of Installation | Indoor / Outdoor |
| Duty Cycle | Contionus |
| Types of Cooling | ONAN |
| Types of Tapechainger | OCTC |
| Tapping Range in + | 5 % |
| Tapping Range in - | 5 % |
| No Load Losses | 1800 W |
| Load Losses | 16950 W |
| Full Load Losses | 18750 W |
| Impidence | 5 % |
| Tempreture in Oil | 40 Degree |
| Tempreture in Winding | 45 Degree |
-
IS 2026 is the Indian Standard titled “Power Transformers” (multiple parts) which lays down design, construction, testing, and performance requirements for oil‑immersed (liquid‑immersed) power and distribution transformers.
-
There are also related standards: IS 1180 (for distribution transformers), IS 335 (for transformer oil), etc. These complement IS 2026.
Here are the usual components and features of oil‑cooled transformers meeting IS 2026:
| Component | Description / Requirement |
|---|---|
| Core | Built from cold‑rolled, grain‑oriented silicon steel laminations. Stamped sheets. Coated/insulated to resist oil and high temperature. Core limbs bound tightly; proper yokes; mechanical clamping to avoid vibration and core losses. |
| Windings | High‐tension (HT) and low‐tension (LT) windings. Usually cylindrical / helical for LT; paper‑covered conductors; sometimes disc type for large ratings. Insulation between turns and layers per relevant impulse withstand levels. Spacers and support to hold windings rigid. |
| Insulation | Use of pressboard, kraft paper, etc. For oil impregnation. Insulation must be rated for thermal stresses and aging. Oil used must comply with IS 335 (mineral oil) or other approved insulating fluids (like synthetic/natural esters) if agreed. |
| Oil / Insulating Liquid | Mineral insulating oil is standard. Must meet dielectric strength, viscosity, flash & fire point, chemical properties as per IS 335. In some newer / eco designs, ester oil or other fluid may be used. First filling, oil sampling, pre‑testing. Oil also used to cool and insulate. |
| Cooling System | Natural oil circulation (ONAN) is common for many distribution and medium sized power transformers. For larger ratings, forced cooling (forced oil, forced air), radiators, corrugated tanks, etc. Temperature rise limits are prescribed. |
| Tap Changers / Tappings | OCTC or OLTC depending on requirement. Taps to allow adjustment for voltage variation. Commonly ±5% in steps of 2.5% or similar. |
| Temperature Rise Limits | The standard prescribes limits for winding temperature (by resistance method) and top oil temperature (by thermometer) for given cooling mode (e.g., ONAN). For many ratings (e.g. common distribution transformers), winding rise ≈ 40‑50 °C, top oil ≈ 35‑45 °C, etc., depending on voltage class and rating. |
| Losses (No‐load & Load Losses) | Must be within prescribed limits. IS standards give maximum permissible values. Manufacturers strive for low core loss (no‑load loss) and lower load loss to improve efficiency. Sometimes star rating levels or efficiency classes are defined. |
-
Power utility‑step down at substations
-
Distribution to residential/commercial/industrial loads
-
Renewable energy plants (solar, wind) connecting to grid
-
Industrial plants needing reliable voltage transformation
-
Locations where safety / fire risk / environmental regulations demand safer insulating fluids
2750 KVA Oil Cooled Type Distribution Transformer - OLTC ( As Per Is : 2026)
₹ 2900900 / Piece Get Latest Price
| Power Rating | 2750 KVA |
| Energy Lable | As Per Is : 2026 |
| Voltage ratio | 11 KV , 0.433 KV |
| Number of Phase | 3 Phase |
| Frequency | 50/60 HZ |
| Type of Installation | Indoor / Outdoor |
| Duty Cycle | Contionus |
| Types of Cooling | ONAN |
| Types of Tapechainger | OLTC |
| Tapping Range in + | 10% |
| Tapping Range in - | 10% |
| No Load Losses | 2750 W |
| Load Losses | 27500 W |
| Full Load Losses | 30250 W |
| Impedane | 6 % |
| Type of connection | DYN11 (As Per Requirement ) |
| Tempreture in Oil | 40 Degree |
| Tempreture in Winding | 45 Degree |
Minimum order quantity: 1 Piece
An oil-cooled distribution transformer is designed to step down high voltage electricity for safe distribution to residential, commercial, or industrial users. The cooling is facilitated by mineral oil or synthetic ester fluids, which also serve as an insulating medium. The On-Load Tap Changer (OLTC) allows for voltage regulation under load without interrupting the power supply.
2. Key Features:| Feature | Description |
|---|---|
| Cooling Type | Oil-immersed (ONAN / ONAF) |
| Voltage Rating | Commonly from 11kV / 22kV / 33kV to 400V |
| Power Rating | Typically from 100 kVA to 5 MVA for distribution purposes |
| Tap Changer Type | On-Load Tap Changer (OLTC), motor-operated |
| Tap Range | ±10% in 1.25% steps (usually 17 steps total) |
| Insulating Medium | Mineral Oil / Synthetic Ester (Eco-friendly options available) |
| Cooling Class | ONAN (Oil Natural Air Natural) / ONAF (Oil Natural Air Forced) |
| Transformer Standard | IEC 60076 / IS 1180 / IS 2026 |
| Digital Integration | SCADA-compatible, IoT sensors, digital OLTC monitoring, DGA sensors |
-
Purpose: Regulates the output voltage in response to load variations, maintaining voltage within prescribed limits.
-
Operation: Operates under load via a motor-driven mechanism. Changes the tap position of the HV winding without power interruption.
-
Tap Changer Location: Usually installed in the HV side of the transformer.
-
Control System:
-
Tap Position Indicator
-
Automatic Voltage Regulator (AVR)
-
Motor Drive Unit (MDU)
-
Remote monitoring via SCADA/IoT in 2026 designs
-
-
Digital Tap Position Feedback
-
Smart sensors for temperature, oil level, gas analysis
-
Eco-friendly fluids for fire safety and biodegradability
-
Remote diagnostics and predictive maintenance
-
Integrated Buchholz relay, WTI, OTI, and PRD
-
Low-loss CRGO / amorphous metal cores
-
IoT-enabled OLTC actuator for advanced control
-
Utility power distribution networks
-
Renewable energy grid interfacing (solar, wind)
-
Industrial facilities requiring voltage regulation
-
Urban substations with load variability
3500 KVA Oil Cooled Type Distribution Transformer - OCTC ( As Per Is : 2026)
₹ 3129000 / Piece Get Latest Price
| Power Rating | 3500 KVA |
| KVA Capicity | 3500 KVA |
| Energy Lable | As Per Is :2026 |
| Voltage ratio | 11 KV , 0.433 KV |
| Number of Phase | 3 Phase |
| Frequency | 50/60 HZ |
| Type of Installation | Indoore / Outdoore |
| Duty Cycle | Contionus |
| Types of Cooling | ONAN |
| Types of Tapechainger | OCTC |
| Tapping Range in + | 5 % |
| Tapping Range in - | 5 % |
| No Load Losses | 3150 W |
| Load Losses | 33600 W |
| Full Load Losses | 36750 W |
| Impidence | 7 % |
| Type of connection | DYN11 (As Per Requirement ) |
| Tempreture in Oil | 40 Degree |
| Tempreture in Winding | 45 Degree |
Minimum order quantity: 1 Piece
-
IS 2026 is the Indian Standard titled “Power Transformers” (multiple parts) which lays down design, construction, testing, and performance requirements for oil‑immersed (liquid‑immersed) power and distribution transformers.
-
There are also related standards: IS 1180 (for distribution transformers), IS 335 (for transformer oil), etc. These complement IS 2026.
Here are the usual components and features of oil‑cooled transformers meeting IS 2026:
| Component | Description / Requirement |
|---|---|
| Core | Built from cold‑rolled, grain‑oriented silicon steel laminations. Stamped sheets. Coated/insulated to resist oil and high temperature. Core limbs bound tightly; proper yokes; mechanical clamping to avoid vibration and core losses. |
| Windings | High‐tension (HT) and low‐tension (LT) windings. Usually cylindrical / helical for LT; paper‑covered conductors; sometimes disc type for large ratings. Insulation between turns and layers per relevant impulse withstand levels. Spacers and support to hold windings rigid. |
| Insulation | Use of pressboard, kraft paper, etc. For oil impregnation. Insulation must be rated for thermal stresses and aging. Oil used must comply with IS 335 (mineral oil) or other approved insulating fluids (like synthetic/natural esters) if agreed. |
| Oil / Insulating Liquid | Mineral insulating oil is standard. Must meet dielectric strength, viscosity, flash & fire point, chemical properties as per IS 335. In some newer / eco designs, ester oil or other fluid may be used. First filling, oil sampling, pre‑testing. Oil also used to cool and insulate. |
| Cooling System | Natural oil circulation (ONAN) is common for many distribution and medium sized power transformers. For larger ratings, forced cooling (forced oil, forced air), radiators, corrugated tanks, etc. Temperature rise limits are prescribed. |
| Tap Changers / Tappings | OCTC or OLTC depending on requirement. Taps to allow adjustment for voltage variation. Commonly ±5% in steps of 2.5% or similar. |
| Temperature Rise Limits | The standard prescribes limits for winding temperature (by resistance method) and top oil temperature (by thermometer) for given cooling mode (e.g., ONAN). For many ratings (e.g. common distribution transformers), winding rise ≈ 40‑50 °C, top oil ≈ 35‑45 °C, etc., depending on voltage class and rating. |
| Losses (No‐load & Load Losses) | Must be within prescribed limits. IS standards give maximum permissible values. Manufacturers strive for low core loss (no‑load loss) and lower load loss to improve efficiency. Sometimes star rating levels or efficiency classes are defined. |
-
Power utility‑step down at substations
-
Distribution to residential/commercial/industrial loads
-
Renewable energy plants (solar, wind) connecting to grid
-
Industrial plants needing reliable voltage transformation
-
Locations where safety / fire risk / environmental regulations demand safer insulating fluids
3500 KVA Oil Cooled Type Distribution Transformer - OLTC ( As Per Is : 2026)
₹ 3393000 / Piece Get Latest Price
| Power Rating | 3500 KVA |
| KVA Capicity | 3500 KVA |
| Energy Lable | As Per Is : 2026 |
| Voltage ratio | 11 KV , 0.433 KV |
| Number of Phase | 3 Phase |
| Frequency | 50/60 HZ |
| Type of Installation | Indoor / Outdoor |
| Duty Cycle | Contionus |
| Types of Cooling | ONAN |
| Types of Tapechainger | OLTC |
| Tapping Range in + | 10 % |
| Tapping Range in - | 10 % |
| No Load Losses | 3150 W |
| Load Losses | 33600 W |
| Full Load Losses | 36750 W |
| Impedane | 7 % |
| Type of connection | DYN11 (As Per Requirement ) |
| Tempreture in Oil | 40 Degree |
| Tempreture in Winding | 45 Degree |
Minimum order quantity: 1 Piece
An oil-cooled distribution transformer is designed to step down high voltage electricity for safe distribution to residential, commercial, or industrial users. The cooling is facilitated by mineral oil or synthetic ester fluids, which also serve as an insulating medium. The On-Load Tap Changer (OLTC) allows for voltage regulation under load without interrupting the power supply.
2. Key Features:| Feature | Description |
|---|---|
| Cooling Type | Oil-immersed (ONAN / ONAF) |
| Voltage Rating | Commonly from 11kV / 22kV / 33kV to 400V |
| Power Rating | Typically from 100 kVA to 5 MVA for distribution purposes |
| Tap Changer Type | On-Load Tap Changer (OLTC), motor-operated |
| Tap Range | ±10% in 1.25% steps (usually 17 steps total) |
| Insulating Medium | Mineral Oil / Synthetic Ester (Eco-friendly options available) |
| Cooling Class | ONAN (Oil Natural Air Natural) / ONAF (Oil Natural Air Forced) |
| Transformer Standard | IEC 60076 / IS 1180 / IS 2026 |
| Digital Integration | SCADA-compatible, IoT sensors, digital OLTC monitoring, DGA sensors |
-
Purpose: Regulates the output voltage in response to load variations, maintaining voltage within prescribed limits.
-
Operation: Operates under load via a motor-driven mechanism. Changes the tap position of the HV winding without power interruption.
-
Tap Changer Location: Usually installed in the HV side of the transformer.
-
Control System:
-
Tap Position Indicator
-
Automatic Voltage Regulator (AVR)
-
Motor Drive Unit (MDU)
-
Remote monitoring via SCADA/IoT in 2026 designs
-
-
Digital Tap Position Feedback
-
Smart sensors for temperature, oil level, gas analysis
-
Eco-friendly fluids for fire safety and biodegradability
-
Remote diagnostics and predictive maintenance
-
Integrated Buchholz relay, WTI, OTI, and PRD
-
Low-loss CRGO / amorphous metal cores
-
IoT-enabled OLTC actuator for advanced control
-
Utility power distribution networks
-
Renewable energy grid interfacing (solar, wind)
-
Industrial facilities requiring voltage regulation
-
Urban substations with load variability
1000 KVA Oil Cooled Type Distribution Transformer - OLTC ( As Per Is : 2026)
₹ 1656000 / Piece Get Latest Price
| Power Rating | 1000 KVA |
| KVA Capicity | 1000 KVA |
| Energy Lable | As Per Is : 2026 |
| Voltage ratio | 11 KV , 0.433 KV |
| Number of Phase | 3 Phase |
| Frequency | 50/60 HZ |
| Type of Installation | Indoor / Outdoor |
| Duty Cycle | Contionus |
| Types of Cooling | ONAN |
| Types of Tapechainger | OLTC |
| Tapping Range in + | 10 % |
| Tapping Range in - | 10 % |
| No Load Losses | 1250 W |
| Load Losses | 12750 W |
| Full Load Losses | 14000 W |
| Impedane | 5 % |
| Type of connection | DYN11 (As Per Requirement ) |
| Tempreture in Oil | 40 Degree |
| Tempreture in Winding | 45 Degree |
Minimum order quantity: 1 Piece
An oil-cooled distribution transformer is designed to step down high voltage electricity for safe distribution to residential, commercial, or industrial users. The cooling is facilitated by mineral oil or synthetic ester fluids, which also serve as an insulating medium. The On-Load Tap Changer (OLTC) allows for voltage regulation under load without interrupting the power supply.
2. Key Features:| Feature | Description |
|---|---|
| Cooling Type | Oil-immersed (ONAN / ONAF) |
| Voltage Rating | Commonly from 11kV / 22kV / 33kV to 400V |
| Power Rating | Typically from 100 kVA to 5 MVA for distribution purposes |
| Tap Changer Type | On-Load Tap Changer (OLTC), motor-operated |
| Tap Range | ±10% in 1.25% steps (usually 17 steps total) |
| Insulating Medium | Mineral Oil / Synthetic Ester (Eco-friendly options available) |
| Cooling Class | ONAN (Oil Natural Air Natural) / ONAF (Oil Natural Air Forced) |
| Transformer Standard | IEC 60076 / IS 1180 / IS 2026 |
| Digital Integration | SCADA-compatible, IoT sensors, digital OLTC monitoring, DGA sensors |
-
Purpose: Regulates the output voltage in response to load variations, maintaining voltage within prescribed limits.
-
Operation: Operates under load via a motor-driven mechanism. Changes the tap position of the HV winding without power interruption.
-
Tap Changer Location: Usually installed in the HV side of the transformer.
-
Control System:
-
Tap Position Indicator
-
Automatic Voltage Regulator (AVR)
-
Motor Drive Unit (MDU)
-
Remote monitoring via SCADA/IoT in 2026 designs
-
-
Digital Tap Position Feedback
-
Smart sensors for temperature, oil level, gas analysis
-
Eco-friendly fluids for fire safety and biodegradability
-
Remote diagnostics and predictive maintenance
-
Integrated Buchholz relay, WTI, OTI, and PRD
-
Low-loss CRGO / amorphous metal cores
-
IoT-enabled OLTC actuator for advanced control
-
Utility power distribution networks
-
Renewable energy grid interfacing (solar, wind)
-
Industrial facilities requiring voltage regulation
-
Urban substations with load variability
250 KVA Oil Cooled Type Distribution Transformer - OCTC ( As Per Is : 2026)
₹ 555000 / Piece Get Latest Price
| Power Rating | 250 KVA |
| KVA Capicity | 250 KVA |
| Energy Lable | As Per Is : 2026 |
| Voltage ratio | 11 KV , 0.433 KV |
| Number of Phase | 3 Phase |
| Frequency | 50/60 HZ |
| Type of Installation | Indoor / Outdoor |
| Duty Cycle | Contionus |
| Types of Cooling | ONAN |
| Types of Tapechainger | OCTC |
| Tapping Range in + | 5 % |
| Tapping Range in - | 5 % |
| No Load Losses | 500 W |
| Load Losses | 4500 W |
| Full Load Losses | 5000 W |
| Impidence | 4.5 % |
| Type of connection | DYN11 (As Per Requirement ) |
| Tempreture in Oil | 40 Degree |
| Tempreture in Winding | 45 Degree |
Minimum order quantity: 1 Piece
-
IS 2026 is the Indian Standard titled “Power Transformers” (multiple parts) which lays down design, construction, testing, and performance requirements for oil‑immersed (liquid‑immersed) power and distribution transformers.
-
There are also related standards: IS 1180 (for distribution transformers), IS 335 (for transformer oil), etc. These complement IS 2026.
Here are the usual components and features of oil‑cooled transformers meeting IS 2026:
| Component | Description / Requirement |
|---|---|
| Core | Built from cold‑rolled, grain‑oriented silicon steel laminations. Stamped sheets. Coated/insulated to resist oil and high temperature. Core limbs bound tightly; proper yokes; mechanical clamping to avoid vibration and core losses. |
| Windings | High‐tension (HT) and low‐tension (LT) windings. Usually cylindrical / helical for LT; paper‑covered conductors; sometimes disc type for large ratings. Insulation between turns and layers per relevant impulse withstand levels. Spacers and support to hold windings rigid. |
| Insulation | Use of pressboard, kraft paper, etc. For oil impregnation. Insulation must be rated for thermal stresses and aging. Oil used must comply with IS 335 (mineral oil) or other approved insulating fluids (like synthetic/natural esters) if agreed. |
| Oil / Insulating Liquid | Mineral insulating oil is standard. Must meet dielectric strength, viscosity, flash & fire point, chemical properties as per IS 335. In some newer / eco designs, ester oil or other fluid may be used. First filling, oil sampling, pre‑testing. Oil also used to cool and insulate. |
| Cooling System | Natural oil circulation (ONAN) is common for many distribution and medium sized power transformers. For larger ratings, forced cooling (forced oil, forced air), radiators, corrugated tanks, etc. Temperature rise limits are prescribed. |
| Tap Changers / Tappings | OCTC or OLTC depending on requirement. Taps to allow adjustment for voltage variation. Commonly ±5% in steps of 2.5% or similar. |
| Temperature Rise Limits | The standard prescribes limits for winding temperature (by resistance method) and top oil temperature (by thermometer) for given cooling mode (e.g., ONAN). For many ratings (e.g. common distribution transformers), winding rise ≈ 40‑50 °C, top oil ≈ 35‑45 °C, etc., depending on voltage class and rating. |
| Losses (No‐load & Load Losses) | Must be within prescribed limits. IS standards give maximum permissible values. Manufacturers strive for low core loss (no‑load loss) and lower load loss to improve efficiency. Sometimes star rating levels or efficiency classes are defined. |
-
Power utility‑step down at substations
-
Distribution to residential/commercial/industrial loads
-
Renewable energy plants (solar, wind) connecting to grid
-
Industrial plants needing reliable voltage transformation
-
Locations where safety / fire risk / environmental regulations demand safer insulating fluids
4500 KVA Oil Cooled Type Distribution Transformer - OLTC ( As Per Is : 2026)
₹ 4015000 / Piece Get Latest Price
| Power Rating | 4000 KVA |
| KVA Capicity | 4500 KVA |
| Energy Lable | As Per Is : 2026 |
| Voltage ratio | 11 KV , 0.433 KV |
| Number of Phase | 3 Phase |
| Frequency | 50/60 HZ |
| Type of Installation | Indoor / Outdoor |
| Duty Cycle | Contionus |
| Types of Cooling | ONAN |
| Types of Tapechainger | OLTC |
| Tapping Range in + | 10% |
| Tapping Range in - | 10% |
| No Load Losses | 3825 W |
| Load Losses | 42750 W |
| Full Load Losses | 46575 W |
| Impedane | 7 % |
| Type of connection | DYN11 (As Per Requirement ) |
| Tempreture in Oil | 40 Degree |
| Tempreture in Winding | 45 Degree |
Minimum order quantity: 1 Piece
An oil-cooled distribution transformer is designed to step down high voltage electricity for safe distribution to residential, commercial, or industrial users. The cooling is facilitated by mineral oil or synthetic ester fluids, which also serve as an insulating medium. The On-Load Tap Changer (OLTC) allows for voltage regulation under load without interrupting the power supply.
2. Key Features:| Feature | Description |
|---|---|
| Cooling Type | Oil-immersed (ONAN / ONAF) |
| Voltage Rating | Commonly from 11kV / 22kV / 33kV to 400V |
| Power Rating | Typically from 100 kVA to 5 MVA for distribution purposes |
| Tap Changer Type | On-Load Tap Changer (OLTC), motor-operated |
| Tap Range | ±10% in 1.25% steps (usually 17 steps total) |
| Insulating Medium | Mineral Oil / Synthetic Ester (Eco-friendly options available) |
| Cooling Class | ONAN (Oil Natural Air Natural) / ONAF (Oil Natural Air Forced) |
| Transformer Standard | IEC 60076 / IS 1180 / IS 2026 |
| Digital Integration | SCADA-compatible, IoT sensors, digital OLTC monitoring, DGA sensors |
-
Purpose: Regulates the output voltage in response to load variations, maintaining voltage within prescribed limits.
-
Operation: Operates under load via a motor-driven mechanism. Changes the tap position of the HV winding without power interruption.
-
Tap Changer Location: Usually installed in the HV side of the transformer.
-
Control System:
-
Tap Position Indicator
-
Automatic Voltage Regulator (AVR)
-
Motor Drive Unit (MDU)
-
Remote monitoring via SCADA/IoT in 2026 designs
-
-
Digital Tap Position Feedback
-
Smart sensors for temperature, oil level, gas analysis
-
Eco-friendly fluids for fire safety and biodegradability
-
Remote diagnostics and predictive maintenance
-
Integrated Buchholz relay, WTI, OTI, and PRD
-
Low-loss CRGO / amorphous metal cores
-
IoT-enabled OLTC actuator for advanced control
-
Utility power distribution networks
-
Renewable energy grid interfacing (solar, wind)
-
Industrial facilities requiring voltage regulation
-
Urban substations with load variability
1000 KVA Oil Cooled Type Distribution Transformer - OCTG ( As Per Is : 2026)
₹ 1292000 / Piece Get Latest Price
| Power Rating | 1000 KVA |
| Energy Lable | As Per Is : 2026 |
| Voltage ratio | 11 KV , 0.433 KV |
| Number of Phase | 3 Phase |
| Frequency | 50/60 HZ |
| Type of Installation | Indoor / Outdoor |
| Duty Cycle | Contionus |
| Types of Cooling | ONAN |
| Types of Tapechainger | OCTC |
| Tapping Range in + | 5 % |
| Tapping Range in - | 5 % |
| No Load Losses | 1250 W |
| Load Losses | 12750 W |
| Full Load Losses | 14000 W |
| Impidence | 5 % |
| Type of connection | DYN11 (As Per Requirement ) |
| Tempreture in Oil | 40 Degree |
| Tempreture in Winding | 45 Degree |
Minimum order quantity: 1 Piece
-
IS 2026 is the Indian Standard titled “Power Transformers” (multiple parts) which lays down design, construction, testing, and performance requirements for oil‑immersed (liquid‑immersed) power and distribution transformers.
-
There are also related standards: IS 1180 (for distribution transformers), IS 335 (for transformer oil), etc. These complement IS 2026.
Here are the usual components and features of oil‑cooled transformers meeting IS 2026:
| Component | Description / Requirement |
|---|---|
| Core | Built from cold‑rolled, grain‑oriented silicon steel laminations. Stamped sheets. Coated/insulated to resist oil and high temperature. Core limbs bound tightly; proper yokes; mechanical clamping to avoid vibration and core losses. |
| Windings | High‐tension (HT) and low‐tension (LT) windings. Usually cylindrical / helical for LT; paper‑covered conductors; sometimes disc type for large ratings. Insulation between turns and layers per relevant impulse withstand levels. Spacers and support to hold windings rigid. |
| Insulation | Use of pressboard, kraft paper, etc. For oil impregnation. Insulation must be rated for thermal stresses and aging. Oil used must comply with IS 335 (mineral oil) or other approved insulating fluids (like synthetic/natural esters) if agreed. |
| Oil / Insulating Liquid | Mineral insulating oil is standard. Must meet dielectric strength, viscosity, flash & fire point, chemical properties as per IS 335. In some newer / eco designs, ester oil or other fluid may be used. First filling, oil sampling, pre‑testing. Oil also used to cool and insulate. |
| Cooling System | Natural oil circulation (ONAN) is common for many distribution and medium sized power transformers. For larger ratings, forced cooling (forced oil, forced air), radiators, corrugated tanks, etc. Temperature rise limits are prescribed. |
| Tap Changers / Tappings | OCTC or OLTC depending on requirement. Taps to allow adjustment for voltage variation. Commonly ±5% in steps of 2.5% or similar. |
| Temperature Rise Limits | The standard prescribes limits for winding temperature (by resistance method) and top oil temperature (by thermometer) for given cooling mode (e.g., ONAN). For many ratings (e.g. common distribution transformers), winding rise ≈ 40‑50 °C, top oil ≈ 35‑45 °C, etc., depending on voltage class and rating. |
| Losses (No‐load & Load Losses) | Must be within prescribed limits. IS standards give maximum permissible values. Manufacturers strive for low core loss (no‑load loss) and lower load loss to improve efficiency. Sometimes star rating levels or efficiency classes are defined. |
-
Power utility‑step down at substations
-
Distribution to residential/commercial/industrial loads
-
Renewable energy plants (solar, wind) connecting to grid
-
Industrial plants needing reliable voltage transformation
-
Locations where safety / fire risk / environmental regulations demand safer insulating fluids
1.25MVA 3-Phase ONAN Distribution Transformer
₹ 1235000 / Piece Get Latest Price
| Power Rating | 1.25MVA |
| Number of Phase | 3-Phase |
| Voltage Ratio | 11kV/433V |
| Winding Material | Copper |
| Standards | IS-1180 |
| Cooling Type | ONAN |
| Frequency | 50Hz |
The transformers will be suitable for outdoor installation with three phase, 50Hz, 11 kV system in which the neutral is effectively earthed and they should be suitable for service with fluctuations in supply voltage up to plus 12.5% to minus 12.5%.
Range : The standard ratings shall be 250, 315, 400, 500, 630, 800, 1000, 1250, 1500, 1600, 2000 and 2500 KVA for 11 kV distribution transformers.
Vector Group : As per customer’s custom requirement.
500kVA 3-Phase ONAN Distribution Transformer
₹ 689000 / Piece Get Latest Price
| Power Rating | 500kVA |
| Number of Phase | 3-Phase |
| Voltage Ratio | 11kV/433V |
| Winding Material | Copper |
| Standards | IS-1180 |
| Cooling Type | ONAN |
| Frequency | 50Hz |
The transformers will be suitable for outdoor installation with three phase, 50Hz, 11 kV system in which the neutral is effectively earthed and theyshould be suitable for service with fluctuations in supply voltage up to plus 12.5% to minus 12.5%.
Range : The standard ratings shall be 250, 315, 400, 500, 630, 800, 1000, 1250, 1500, 1600, 2000 and 2500 KVA for 11 kV distribution transformers.
Vector Group : As per customer’s custom requirement.
2MVA 3-Phase ONAN Distribution Transformer
₹ 1877000 / Piece Get Latest Price
| Power Rating | 2MVA |
| Number of Phase | 3-Phase |
| Voltage Ratio | 11kV/433V |
| Winding Material | Copper |
| Standards | IS-1180 |
| Cooling Type | ONAN |
| Frequency | 50Hz |
The transformers will be suitable for outdoor installation with three phase, 50Hz, 11 kV system in which the neutral is effectively earthed and theyshould be suitable for service with fluctuations in supply voltage up to plus 12.5% to minus 12.5%.
Range : The standard ratings shall be 250, 315, 400, 500, 630, 800, 1000, 1250, 1500, 1600, 2000 and 2500 KVA for 11 kV distribution transformers.
Vector Group : As per customer’s custom requirement.
315kVA 3-Phase ONAN Distribution Transformer
₹ 515000 / Piece Get Latest Price
| Power Rating | 315kVA |
| Number of Phase | 3-Phase |
| Voltage Ratio | 11kV/433V |
| Winding Material | Copper |
| Standards | IS-1180 |
| Cooling Type | ONAN |
| Frequency | 50Hz |
Range : The standard ratings shall be 250, 315, 400, 500, 630, 800, 1000, 1250, 1500, 1600, 2000 and 2500 KVA for 11 kV distribution transformers.
Vector Group : As per customer’s custom requirement.
Core : The core shall be stack / wound type of high grade cold rolled
250kVA Three Phase ONAN Distribution Transformer
₹ 335000 / Piece Get Latest Price
| Power Rating | 250kVA |
| Voltage Ratio | 11kV/433V |
| Number of Phase | Three Phase |
| Winding Material | Copper |
| Standards | IS-1180 |
| Cooling Type | ONAN |
| Supply Frequency | 50Hz |
The transformers will be suitable for outdoor installation with three phase, 50Hz, 11 kV system in which the neutral is effectively earthed and theyshould be suitable for service with fluctuations in supply voltage up to plus 12.5% to minus 12.5%.
Range : The standard ratings shall be 250, 315, 400, 500, 630, 800, 1000, 1250, 1500, 1600, 2000 and 2500 KVA for 11 kV distribution transformers.
Vector Group : As per customer’s custom requirement.
Core : The core shall be stack / wound type of high grade cold rolled grain oriented annealed steel lamination having low loss and good grain properties, coated with hot oil proof insulation, bolted together and to the frames firmly to prevent vibration or noise.
Core Test : The preliminary core loss test will be conducted before passing to the assembly stage.
Winding : HV and LV windings shall be wound from Super Enamel covered /Double Paper covered, aluminium /copper conductor/ foil.
200kVA 3-Phase ONAN Distribution Transformer
₹ 335000 / Piece Get Latest Price
| Power Rating | 200kVA |
| Number of Phase | 3-Phase |
| Voltage Ratio | 11kV/433V |
| Winding Material | Copper |
| Standards | IS-1180 |
| Cooling Type | ONAN |
| Frequency | 50Hz |
Range : The standard ratings shall be 250, 315, 400, 500, 630, 800, 1000, 1250, 1500, 1600, 2000 and 2500 KVA for 11 kV distribution transformers.
Vector Group : As per customer’s custom requirement.
1.6MVA 3-Phase ONAN Distribution Transformer
₹ 1486000 / Piece Get Latest Price
| Power Rating | 1.6MVA |
| Number of Phase | 3-Phase |
| Voltage Ratio | 11kV/433V |
| Winding Material | Copper |
| Standards | IS-1180 |
| Cooling Type | ONAN |
| Frequency | 50Hz |
The transformers will be suitable for outdoor installation with three phase, 50Hz, 11 kV system in which the neutral is effectively earthed and theyshould be suitable for service with fluctuations in supply voltage up to plus 12.5% to minus 12.5%.
Range : The standard ratings shall be 250, 315, 400, 500, 630, 800, 1000, 1250, 1500, 1600, 2000 and 2500 KVA for 11 kV distribution transformers.
Vector Group : As per customer’s custom requirement.
1MVA 3-Phase ONAN Distribution Transformer
₹ 1072000 / Piece Get Latest Price
| Power Rating | 1MVA |
| Number of Phase | 3-Phase |
| Voltage Ratio | 11kV/433V |
| Cooling Type | ONAN |
| Winding Material | Copper |
| Standards | IS-1180 |
| Frequency | 50Hz |
The transformers will be suitable for outdoor installation with three phase, 50Hz, 11 kV system in which the neutral is effectively earthed and they should be suitable for service with fluctuations in supply voltage up to plus 12.5% to minus 12.5%.
Range : The standard ratings shall be 250, 315, 400, 500, 630, 800, 1000, 1250, 1500, 1600, 2000 and 2500 KVA for 11 kV distribution transformers.
Vector Group : As per customer’s custom requirement.
Contact Us
Hirenkumar Chakalasiya (Proprietor)
Kay Pee Corporation
Block No. 89, Survey No. 113/2, Village Mota Borsara Kim, Taluka Mangrol
Surat - 394110, Gujarat, India