35kV On-Load Tap-Changing Transformer
Standards
GB / IEC 60076
Testing
Routine report
Origin
China
35kV On-Load Tap-Changing Transformers
3150 kVA 35 kV Oil-Immersed Transformer High Performance
High-performance 3150KVA 35KV Oil-immersed Transformer provides stable power supply suitable for various power engineering scenarios.
- Product type
- 35kV On-Load Tap-Changing Transformer
- Rated capacity
- 3,150 kVA
- Voltage class
- 35 kV
- Cooling
- ONAN / ONAF
- Tap range
- Off-circuit or on-load, project-specific
- Winding
- Copper or aluminium (project-specific)
Final ratings, losses, impedance and dimensions are confirmed on the approved datasheet. Website values are for family selection.
- Routine test report with the unit
- English GA drawing and O&M manual
- Copper or aluminium winding options
- 50 Hz / 60 Hz and harsh-site options
Product overview
High-performance 3150KVA 35KV Oil-immersed Transformer provides stable power supply suitable for various power engineering scenarios.
Currently, the power infrastructure sector commonly faces industry pain points such as high losses in medium-voltage transformers, excessive temperature rise under heavy loads, and insufficient adaptability to outdoor operating conditions. Many purchasers often encounter problems such as high energy consumption during equipment operation, poor compatibility with supporting equipment, and persistently high long-term maintenance costs. To address these challenges, our factory has launched a high-performance 3150KVA 35KV oil-immersed transformer. Combined with compatible High And Low Voltage Switchgear and Electric Power Converter , it can complete the construction of a complete power system. It can also be matched with Dry Type Transformer , Box Type Substation , and Combined Photovoltaic Substations to form an integrated power supply solution, comprehensively covering the needs of industrial, photovoltaic power plants, and urban substation projects. The equipment adopts a low-loss iron core and insulating oil cooling structure, significantly reducing no-load losses. 35kV high-voltage insulation technology enhances outdoor weather resistance, keeping voltage fluctuations within a minimal range during long-term full-load operation. This reduces monthly electricity costs for enterprises and shortens equipment downtime, ensuring uninterrupted and stable power supply to factories and photovoltaic power plants. This oil-immersed transformer is suitable for self-owned power stations in industrial and mining enterprises, combined photovoltaic substations in large photovoltaic parks, and urban and rural power grid renovation projects. It can be independently assembled with a high and low voltage switchgear to form a box-type substation, or it can work in conjunction with an electric power converter to regulate transmission current. Compared to dry-type transformers of the same specifications, it offers advantages such as lower cost, stronger heat dissipation efficiency, and large-capacity heavy-load adaptability, making it the mainstream choice for medium and high voltage power grid expansion and new energy substation projects.
Design features
What the design is built around
Low-loss and energy-saving design
The iron core is made of high-permeability magnetic material, significantly reducing no-load and load losses. Long-term operation effectively reduces electricity operating costs, making it suitable for large factories and photovoltaic power plants with long-term uninterrupted operation. Integrated and Compatible: Seamlessly connects to High and Low Voltage Switchgear and Electric Power Converters, and flexibly integrates into Box Type Substations and Combined Photovoltaic Substations systems, simplifying engineering assembly and adaptation.
Maintenance Tips
Regularly Inspect Insulating Oil Condition
Sample and test the withstand voltage of the oil-immersed transformer's insulating oil every six months. Replace the oil promptly if it fails to meet standards to prevent equipment failure caused by insulation aging.
Select the Right Model Based on Operating Conditions
For indoor enclosed spaces, prioritize Dry Type Transformers. For outdoor open-air substation projects, choose this 3150KVA 35KV Oil-immersed Transformer to extend equipment lifespan.
Typical specification
Specifications to confirm on the datasheet
| Product type | 35kV On-Load Tap-Changing Transformer |
|---|---|
| Rated capacity | 3,150 kVA |
| Voltage class | 35 kV |
| Cooling | ONAN / ONAF |
| Tap range | Off-circuit or on-load, project-specific |
| Winding | Copper or aluminium (project-specific) |
| Standards | GB 1094.1, GB/T 6451, IEC 60076 |
| Testing | Routine tests plus type and special tests on request |
The table is a family-level starting point. The approved datasheet fixes the guaranteed values, drawing dimensions and test plan for the specific order.
Typical applications
- 35 kV industrial main substations
- Utility distribution with voltage regulation
- Steel, cement and chemical plants
- Renewable-energy step-up
- Mining and oil-gas facilities
Confirm before ordering
- Rated capacity, voltage ratio and tap range
- Impedance, fault level and parallel operation
- Ambient temperature, altitude and enclosure
- Winding material, losses and efficiency class
- Terminations, protection and monitoring
- Tests, inspection, packing and shipping limits
Buyer questions
FAQ for 3150 kVA 35 kV Oil-Immersed Transformer High Performance
In which scenarios is this 3150KVA 35KV Oil-immersed Transformer suitable?
What is the routine maintenance cycle for the equipment?
What services are included in the after-sales warranty?
Does it support customized complete sets of equipment?
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