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Fengguang Transformer
3150 kVA 35 kV Oil-Immersed power Transformer — Fengguang Transformer 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 power Transformer

3,150 kVA 35 kV 35kV On-Load Tap-Changing Transformer

The industry's pain points lie in the insufficient stability of ultra-high- Power Distribution Equipment , the high difficulty of grid connection, and the relatively high operation and maintenance costs. Your concern is the inability to find high-specification power supply equipment that can adapt to extremely large loads while ensuring both safety and efficiency. We have specially developed the 3150KVA/ 35kv Transformer , which can be flexibly selected as Oil Immersed Transformer or Dry Type Transformer . It is combined with High And Low Voltage Switchgear to achieve precise power distribution. In practical applications, it can stably carry a 2520kW active load, effectively solving the problems of unstable power supply and poor grid connection in extremely large scenarios, and significantly reducing operation and maintenance costs. The core value of this product lies in achieving efficient and stable conversion from 35KV high voltage to 0.4KV low voltage. It is mainly characterized by high capacity, high reliability, and easy grid connection. It is widely used in large industrial bases, centralized photovoltaic power stations, large hubs and other extremely large load scenarios. It can operate in coordination with Box Type Substation and Electric Power Converter , seamlessly connect with Combined Photovoltaic Substations to complete power collection and grid connection, ensuring the safety, efficiency and stability of large-scale power transmission.

Quick answer. 3150 kVA 35 kV Oil-Immersed power Transformer is a 35kV On-Load Tap-Changing Transformer rated 3,150 kVA at 35 kV. Typical applications include 35 kV industrial main substations, Utility distribution with voltage regulation, Steel, cement and chemical plants. It is designed to GB 1094.1 and IEC 60076, with routine tests recorded against the approved 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)

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
GB 1094.1· GB/T 6451· IEC 60076· ISO 9001 / 14001 / 45001· CE where applicable

Product overview

The industry's pain points lie in the insufficient stability of ultra-high- Power Distribution Equipment , the high difficulty of grid connection, and the relatively high operation and maintenance costs. Your concern is the inability to find high-specification power supply equipment that can adapt to extremely large loads while ensuring both safety and efficiency. We have specially developed the 3150KVA/ 35kv Transformer , which can be flexibly selected as Oil Immersed Transformer or Dry Type Transformer . It is combined with High And Low Voltage Switchgear to achieve precise power distribution. In practical applications, it can stably carry a 2520kW active load, effectively solving the problems of unstable power supply and poor grid connection in extremely large scenarios, and significantly reducing operation and maintenance costs. The core value of this product lies in achieving efficient and stable conversion from 35KV high voltage to 0.4KV low voltage. It is mainly characterized by high capacity, high reliability, and easy grid connection. It is widely used in large industrial bases, centralized photovoltaic power stations, large hubs and other extremely large load scenarios. It can operate in coordination with Box Type Substation and Electric Power Converter , seamlessly connect with Combined Photovoltaic Substations to complete power collection and grid connection, ensuring the safety, efficiency and stability of large-scale power transmission.

Product Features (Key Extracts)

High capacity and high reliability: Specifically designed for extremely large load scenarios, it has ample capacity and strong operational stability. It adopts high-quality iron cores and coil designs, featuring outstanding resistance to overloading and shock. It can continuously meet the high-power electricity demands of extremely large production lines and centralized photovoltaic power stations. It works smoothly in conjunction with Combined Photovoltaic Substations and Electric Power Converters, has high grid connection efficiency, and can be combined with Box Type Substation to achieve integrated power distribution and control.

2. Strong adaptability and energy-saving: The Oil Immersed Transformer adopts efficient heat dissipation and anti-corrosion sealing technology, which is suitable for outdoor complex and harsh environments, and can withstand temperature differences and dust interference. The Dry Type Transformer has excellent fireproof and moisture-proof properties, suitable for indoor scenarios with high fire prevention and high cleanliness requirements. Both can be seamlessly connected with High And Low Voltage Switchgear without additional modifications, and have low no-load loss, resulting in significant energy-saving effects over the long term.

The selection should take into account the peak load of the site and the installation environment. For extremely large outdoor industrial scenarios, Oil Immersed Transformers should be preferred; for indoor hubs and precision workshops, Dry Type Transformers should be chosen. For new energy projects, Combined Photovoltaic Substations and Electric Power Converters should be used simultaneously to ensure grid connection stability.

2. In daily operation and maintenance, special attention should be paid to the operating status of the equipment. For oil-immersed transformers, regular inspections of the oil quality and cooling system are necessary. For dry-type transformers, regular cleaning of the cooling components and inspection of insulation performance are required to prevent the equipment from being affected in its service life due to load fluctuations or improper maintenance.

Design features

What the design is built around

Low-loss magnetic core

Cold-rolled grain-oriented silicon steel and a stepped core reduce no-load loss and audible noise.

Sealed tank construction

Welded tank, quality-gasketed cover and pressure-tested seals reduce oil leakage risk in outdoor duty.

Thermal margin for hot climates

Cooling surfaces and oil volume are selected for high ambient temperature and cyclic loading.

System compatibility

MV terminals, cable boxes and LV bushings are matched to the switchgear and protection scheme.

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 power Transformer

What is 3150 kVA 35 kV Oil-Immersed power Transformer best used for?
This model is specified at 3,150 kVA and 35 kV. It is used where the site load, fault level and environmental conditions match the approved datasheet. Share the load profile, ambient temperature, altitude and grid code and the design can be checked against the application.
What is the typical lead time for 3150 kVA 35 kV Oil-Immersed power Transformer?
Standard distribution units typically ship in 25-40 days after drawing approval. Large power transformers and integrated stations are scheduled by design review, core and winding production, tanking, testing and packing. The exact date is confirmed in the quotation.
Which standards and tests are supplied?
The transformer family is designed to GB 1094.1, GB/T 6451 and IEC 60076. Routine tests include winding resistance, ratio, impedance, no-load loss, load loss, insulation resistance and power-frequency withstand. Type and special tests are available on request.
Can the transformer be customised for 60 Hz or a hot climate?
Yes. Frequency, ambient temperature, altitude, enclosure, corrosion class and terminal arrangement are project inputs. The design is adjusted before production, and the approved datasheet becomes the inspection basis.
How do I choose between copper and aluminium windings?
Copper gives higher short-circuit strength and a more compact winding; aluminium can reduce first cost for lightly loaded units. The choice depends on fault level, load profile, loss evaluation and the buyer's specification. Both are available.

Related models

Other configurations in this family

All 35kV OLTC Transformer

Project inquiry

Tell us what the transformer has to do.

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