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Fengguang Transformer
20000 kVA 35 kV Oil-Immersed Transformer No Excitation — Fengguang Transformer 35kV On-Load Tap-Changing Transformer

Standards

GB / IEC 60076

Testing

Routine report

Origin

China

35kV On-Load Tap-Changing Transformers

20000 kVA 35 kV Oil-Immersed Transformer No Excitation

20,000 kVA 35 kV 35kV On-Load Tap-Changing Transformer

20000KVA 35KV Oil-immersed Transformer for Industrial Power Grid Stabilization and Distribution

Quick answer. 20000 kVA 35 kV Oil-Immersed Transformer No Excitation is a 35kV On-Load Tap-Changing Transformer rated 20,000 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
20,000 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

20000KVA 35KV Oil-immersed Transformer for Industrial Power Grid Stabilization and Distribution

In the current high-voltage power distribution industry, large industrial and mining power plants commonly suffer from unstable voltage regulation and high equipment losses under heavy loads. Many enterprises face challenges such as poor adaptability of traditional Power Distribution Equipment , high operation and maintenance costs, and inability to meet large-capacity power supply demands. To address these issues, this 20000KVA 35KV oil-immersed transformer utilizes mature non-excitation voltage regulation technology and a fully sealed oil-immersed structure design, precisely adapting to large-capacity high-voltage power distribution scenarios. The equipment can stabilize grid voltage, reduce operating energy consumption, and is compatible with various power supporting equipment, significantly improving the power supply stability and security of industrial and mining power plants, photovoltaic power plants, and municipal power grids, effectively reducing equipment failure downtime and lowering long-term operating costs. In the construction of a complete power system, this equipment can be flexibly combined with Dry Type Transformers and Box Type Substations to adapt to the power distribution layout requirements of different sites. It can also be used with High And Low Voltage Switchgear and Electric Power Converters to complete the construction of a complete power transmission and voltage stabilization system. It is widely applicable to the expansion and renovation projects of conventional industrial and mining substations and Combined Photovoltaic Substations , making it a core main equipment for high-voltage, high-capacity power distribution scenarios.

Design features

What the design is built around

Stable and Reliable Voltage Stabilization Performance

Adopting a non-excitation manual voltage regulation structure, it boasts high voltage regulation accuracy and a low failure rate. It can be adapted to 35KV high voltage and 20000KVA high-capacity load conditions for extended periods. It exhibits excellent overload and impact resistance, meeting the continuous uninterrupted power supply requirements of industry.

Practical Tips

Voltage regulation operations must be performed under complete power-off conditions. Live voltage regulation is strictly prohibited to avoid equipment damage and safety accidents. Regularly check the insulating oil condition and clean the equipment's heat dissipation dust to ensure heat dissipation efficiency and operational stability.

Frequently Asked Questions (FAQ)

Q1

What are the main application scenarios for this equipment?

A1

This product is a 35KV high-capacity high-voltage power distribution device, mainly used in large factories, industrial parks, municipal power grids, photovoltaic integrated substations, etc. It can be paired with various power supporting equipment to complete power transformation, voltage stabilization, and power distribution work, and is suitable for large-scale power transmission and power supply expansion projects.

Typical specification

Specifications to confirm on the datasheet

Product type 35kV On-Load Tap-Changing Transformer
Rated capacity 20,000 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 20000 kVA 35 kV Oil-Immersed Transformer No Excitation

What is 20000 kVA 35 kV Oil-Immersed Transformer No Excitation best used for?
This model is specified at 20,000 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 20000 kVA 35 kV Oil-Immersed Transformer No Excitation?
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

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