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Fengguang Transformer
500 kVA 20 kV Oil-Immersed power Transformer — Fengguang Transformer 20kV Oil-Immersed Distribution Transformer

Standards

GB / IEC 60076

Testing

Routine report

Origin

China

20kV Distribution Transformers

500 kVA 20 kV Oil-Immersed power Transformer

500 kVA 20 kV 20kV Oil-Immersed Distribution Transformer

In the context of the widespread adoption of 20KV high-voltage power supply systems and the upgrading of factory areas, many enterprises encounter problems such as increased electricity load and limited selection of high-voltage equipment. The 500kVA 20KV oil-immersed power transformer is specifically designed for high-voltage medium-load conditions and is suitable for industrial and mining enterprises, expansion of industrial parks, rural high-voltage power distribution, and distributed energy support projects. The equipment can be combined with Box Type Substation for complete integration, and together with High And Low Voltage Switchgear , it can complete the overall power distribution layout, meeting the actual needs of current high-voltage power grid construction.

Quick answer. 500 kVA 20 kV Oil-Immersed power Transformer is a 20kV Oil-Immersed Distribution Transformer rated 500 kVA at 20 kV. Typical applications include 20 kV industrial distribution, Mining and heavy industry, Renewable-energy collection systems. It is designed to GB 1094.1 and IEC 60076, with routine tests recorded against the approved datasheet.
Product type
20kV Oil-Immersed Distribution Transformer
Rated capacity
500 kVA
Voltage class
20 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

500kVA 20KV Oil-immersed Power Transformer

In the context of the widespread adoption of 20KV high-voltage power supply systems and the upgrading of factory areas, many enterprises encounter problems such as increased electricity load and limited selection of high-voltage equipment. The 500kVA 20KV oil-immersed power transformer is specifically designed for high-voltage medium-load conditions and is suitable for industrial and mining enterprises, expansion of industrial parks, rural high-voltage power distribution, and distributed energy support projects. The equipment can be combined with Box Type Substation for complete integration, and together with High And Low Voltage Switchgear , it can complete the overall power distribution layout, meeting the actual needs of current high-voltage power grid construction.

The equipment has a wide range of applications. It can either be used alone as the main power supply equipment for a region or combined with Oil Immersed Transformer and Dry Type Transformer for networking. By using Electric Power Converter to stabilize power quality, it can smoothly connect to Combined Photovoltaic Substations , helping the factory to achieve the integration and utilization of new energy, balancing both conventional production electricity and green power supply models, and having strong overall adaptability, suitable for the alternating upgrade of new and old power distribution systems. Product Features The high-voltage insulation configuration has been upgraded to meet the 20KV rated operation standard. The load output is stable, and it can smoothly handle peak daytime electricity consumption and periodic load increases. The operating loss is controlled reasonably.

The overall sealed box design ensures reliable protection performance. It is suitable for various installation environments such as open distribution rooms and outdoor independent locations. The structure is stable, and the daily operation has strong anti-interference ability.

Tips for Use Keep the placement location well-ventilated and dry, and reserve sufficient heat dissipation space. Avoid long-term enclosed and stuffy conditions to delay component aging. During periods with large temperature differences in the season, pay attention to the sealing status of the box to prevent water vapor from entering the interior and maintain the long-term stable operation of the equipment.

Q&A Q1: Is this model more suitable for new projects or for upgrading old lines? A1: Both scenarios can be compatible. The overall parameters are standardized, the installation interfaces are universal. New projects can be directly installed in a complete set, and the upgrading of the 20KV old lines does not require significant changes to the basic lines. The renovation cycle is short.

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 20kV Oil-Immersed Distribution Transformer
Rated capacity 500 kVA
Voltage class 20 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

  • 20 kV industrial distribution
  • Mining and heavy industry
  • Renewable-energy collection systems
  • Ports and logistics parks
  • Utility substations

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 500 kVA 20 kV Oil-Immersed power Transformer

What is 500 kVA 20 kV Oil-Immersed power Transformer best used for?
This model is specified at 500 kVA and 20 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 500 kVA 20 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.

Project inquiry

Tell us what the transformer has to do.

Load, voltage class, site conditions, standards and required documents are enough to start. We reply through the inquiry thread.

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