133kV / 135kV Three-Phase Power Transformer is a high-voltage oil-immersed transformer designed for substations, utility networks, industrial power systems, and large-scale transmission and distribution projects. Manufactured with high-quality magnetic steel, optimized winding structures, and robust insulation systems, the transformer provides reliable voltage transformation, low losses, strong short-circuit resistance, and stable long-term operation. Custom voltage ratios, capacity, vector groups, cooling systems, tap changers, and accessories are available according to project requirements.
The 133kV 135kV Three-Phase Power Transformer is designed for high-voltage substations and medium-to-large power transmission and distribution systems.
It converts high-voltage electrical power to the required medium- or low-voltage level for subsequent transmission, distribution, or industrial use. The transformer can be engineered according to different grid configurations, environmental conditions, load characteristics, and international technical standards.
The transformer adopts a robust oil-immersed construction with a high-efficiency magnetic core, optimized HV/LV winding arrangement, reliable insulation system, and advanced cooling configuration.
It is suitable for:
Zisheng are a professional 19+ years manufacturer in producing Oil-Immersed Transformers, Compact Substation, Pad Mounted Transformers, Pole Mounted Transformers and Dry Type Transformers. We own the certificates of ISO/CE/IEC 60076 and TUV Rheinland.
Transformers undergo rigorous FAT and type testing, support voltage/capacity customization. Welcome to consult for Catalog and Product. you can contact us at email [email protected].
Our 133kV / 135kV Three-Phase Power Transformer is designed for high-voltage substation and power transmission projects requiring reliable voltage transformation, stable grid operation, and long-term performance.
The transformer can be engineered according to the project’s rated capacity, voltage ratio, cooling system, tap-changing requirements, insulation level, vector group, and applicable standards.
Project Type: High-Voltage Substation
Transformer Type: Three-Phase Oil-Immersed Power Transformer
High Voltage: 133kV / 135kV
Low Voltage: 33kV / 11kV / Customized
Capacity: Project-Specific
Frequency: 50Hz / 60Hz
Cooling: ONAN / ONAF / Customized
Tap Changer: OLTC / OCTC
Applicable Standards: IEC / ANSI / IEEE / GOST / Customer Specification
For EPC and utility projects, Zisheng can provide a complete transformer supply package covering:
High-Voltage Reliability
Designed for demanding substation applications and continuous grid operation.
Customized Engineering
Electrical, mechanical, cooling, protection, and tap-changing configurations can be adapted to project requirements.
Factory Tested
Each transformer undergoes strict routine testing before shipment, with test documentation available for project acceptance.
EPC-Friendly Delivery
Technical documentation, packaging, testing, and delivery can be coordinated to support international EPC project schedules.
By combining custom engineering, controlled manufacturing, factory testing, and project-oriented technical support, the 133kV / 135kV transformer provides a dependable solution for high-voltage substations and large-scale power infrastructure.
Need a 133kV or 135kV transformer for your project?
Send us your capacity, HV/LV voltage, frequency, vector group and project standard for a customized technical proposal.
| Parameter | Typical Specification |
|---|---|
| Product Type | Three-Phase Power Transformer |
| Rated Voltage | 133kV / 135kV |
| High Voltage | 133kV or 135kV |
| Low Voltage | Customized |
| Rated Capacity | Customized |
| Frequency | 50Hz / 60Hz |
| Phase | Three Phase |
| Installation | Outdoor / Indoor |
| Cooling Type | ONAN / ONAF / OFAF |
| Tap Changer | OCTC / OLTC |
| Vector Group | Customized |
| Impedance | Project-specific |
| Neutral | Customized |
| Insulation Level | According to applicable standards |
| Transformer Oil | Mineral oil / Customized |
| Core Material | High-grade grain-oriented electrical steel |
| Winding Material | Copper / Aluminum |
| Standards | IEC / ANSI / IEEE / Other standards |
| Service | OEM / ODM / Custom Engineering |
Note: Actual rated capacity, voltage ratio, impedance, insulation level, vector group, tap range and cooling method should be determined according to the customer’s technical specification.
Typical Voltage Ratios
Depending on the substation design, typical configurations may include:
- 133kV / 33kV
- 133kV / 11kV
- 133kV / 13.8kV
- 135kV / 33kV
- 135kV / 11kV
- 135kV / 13.8kV
- 133/33/11kV
- 135/33/11kV
Three-winding configurations can also be supplied for complex substation applications.
Transformer Configuration
The transformer can be supplied with a comprehensive range of components and accessories.
Main Components
- Transformer tank
- Magnetic core
- HV windings
- LV windings
- Insulation system
- Transformer oil
- Radiators
- Conservator
- Buchholz relay
- Pressure relief device
- Oil level indicator
- Winding temperature indicator
- Oil temperature indicator
- HV/LV bushings
- Earthing terminals
- Lifting lugs
- Oil drain valve
- Sampling valve
Optional Equipment
- OLTC
- Motor drive mechanism
- On-load tap changer controller
- Cooling control cabinet
- Fans
- Oil pumps
- Online temperature monitoring
- Oil level monitoring
- Digital monitoring system
- Surge arresters
- CTs
- Remote monitoring system
Used for high-voltage grid transmission and distribution networks, supporting reliable power delivery between transmission and distribution voltage levels.
Suitable for large industrial facilities requiring high-capacity and stable power supply.
Can be integrated into:
Designed for demanding mining environments where high reliability and robust construction are required.
Suitable for airports, railways, ports, water treatment facilities, and other large infrastructure projects.
For EPC contractors, the product can be supplied as part of a complete transformer solution rather than simply as a standalone transformer.
This makes the 133kV / 135kV transformer suitable for utility, EPC, industrial and infrastructure projects requiring customized high-voltage substation equipment.
It is a high-voltage three-phase transformer designed for substations and power transmission/distribution systems operating around the 133kV or 135kV voltage class.
Yes. Capacity, voltage ratio, impedance, vector group, tap changer, cooling system, insulation level, accessories, and other parameters can be customized.
Yes. 133kV/33kV is one of the possible voltage configurations. Other voltage ratios can also be manufactured according to the project requirements.
Yes. A 135kV/33kV three-phase transformer can be designed and manufactured according to the required capacity and technical specification.
Yes. An on-load tap changer (OLTC) can be supplied where automatic voltage regulation is required.
Depending on the capacity and application, options can include ONAN, ONAF and OFAF.
IEC, ANSI/IEEE, GOST and other customer-specified standards can be supported.
Yes. Routine test reports and other required inspection/test documentation can be provided according to the project requirements.
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