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High Voltage Power Transformers, Substation Transformers & Industrial Transformers (Up to 230kV, 200MVA)
Stable HV Transmission / All-Scenario Reliability
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Why Choose Pearl Electric as Your HV Transformer Manufacturer

As a trusted electrical transformers manufacturer, Pearl Electric produces premium oil immersed transformers and industrial transformers for power grids, substations, and renewable energy. From hv power transformers to custom 3 phase step up transformers and step down power transformers, every unit is engineered to IEC 60076 standards, with CE/UL/TUV/ASTA certifications.
High Voltage Power Transformer Manufacturer - Pearl Electric Factory
Oil Immersed Transformer Production Line - IEC 60076 Certified
Electrical Transformers Quality Testing - CE UL TUV ASTA Certified

HV Power Transformer Specifications: 3 Phase Transformer Ratings & Voltage Options

          Maximum Power Rating           10MVA~200MVA
          Primary Voltage           66KV  69KV  110KV  115KV  132KV  138KV  220KV  230KV
          Transformer Winding           High quality copper wire or Aluminum wire
          Transformer Core           High quality grain-oriented cold rolled siliconsteel of high magnetic conductivity
          Transformer Oil           Mineral oil/ Vegetable oil/Silicon oil
          Optional Components           On-load tap changer, winding thermometer, Oil thermometer, Oil level gauge,
          Cable box, Terminal Box, Gas relay, Pressure Relief Valve,
          Vector Group           YNd5/YNd11 or Customized
         Transformer standards and energy efficiency requirements           IEC 60076 | ANSI/IEEE C57 | BS | NEMA Standard
          EU Regulation 548-2014 Eco-design Tier 2 | DOE 2016 Standard

Oil Immersed Power Transformers & Three Phase Substation Transformers Series

Core, Winding & Insulation Construction of HV Transformers

Core

⦁ Constructed with premium grain-oriented cold-rolled silicon steel for high permeability
⦁ 45° full-step staggered lamination reduces no-load loss by 20% - cutting energy costs effectively

LV Winding

⦁ Precision-engineered with high-purity copper foil/wire and balanced ampere-turns
⦁ 15% reduced stray losses with oil-duct cooling lowering temperature by 10°C - extending service life by 3-5 years
⦁ Overload capacity improved to 150% rated current - minimizing downtime during peak demand

HV Winding

⦁ HV winding is manufactured with high quality copper wire and excellent design structure.
⦁ It improves the distribution of electric field. With lightning impulse analysis, the ability of anti-lighting impulse has been improved - preventing $50k+ lightning damage annually

Insulation Construction

⦁ Class A oil-impregnated insulation features concentric HV/LV coil alignment with precision-engineered oil-paper barriers
⦁ The minimized oil clearance design enhances dielectric strength while maintaining operating temperature at full load - ensuring 99.9% power availability

HV Transformer Testing: IEC & GB Standard Compliance

Quality control verification card are used for the complete manufacturing process thus assuring traceability of all operations.
100% incoming material control as well as inspections at major supplier's premises
Extensive quality training for all employees
Certificate:ISO9001, ISO14001, OHSAS18001
Testing

Frequently Asked Questions

  • 1. What voltage classes does Pearl Electric's high voltage transformer cover?
    Pearl Electric's high voltage power transformers cover primary voltage classes from 66KV up to 230KV, including standard ratings such as 69KV, 110KV, 115KV, 132KV, and 138KV transformer configurations, with power ratings from 10MVA to 200MVA. All units are engineered to IEC 60076 standards and hold CE/UL/TUV/ASTA certifications.
  • 2. What's the difference between a step up transformer and a step down power transformer?
    A step up transformer raises voltage — typically used at generation sites like wind and solar farms to bring generator output up to grid-transmission levels. A step down power transformer does the opposite, reducing high transmission voltage to a usable level for substations or industrial equipment. Pearl Electric custom-builds both 3 phase step up and step down power transformers depending on the application.
  • 4. Can Pearl Electric customize a 138KV or 115KV transformer for a specific project?

    Yes. Pearl Electric offers fully customized high voltage transformer and industrial transformer solutions, including 69KV, 115KV, and 138KV transformer configurations, with options such as on-load tap changers, winding/oil thermometers, gas relays, and pressure relief valves, tailored to project-specific vector group (YNd5/YNd11) and standard requirements (IEC 60076, ANSI/IEEE C57, BS, NEMA).

Discover Infinite Possibilities of Power Transfomer

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High Voltage Transformer Applications by Industry

Renewable Energy

Renewable Energy

⦁ Renewable energy installations such as wind farms and solar parks require step-up transformers and hv power transformer solutions to raise generator voltages to medium-voltage levels for grid integration.
⦁ Pearl Electric's oil-immersed high voltage transformers feature low losses, robust ONAN/ONAF cooling, and high moisture resistance, ensuring efficient and stable operation even in harsh conditions.
⦁ Supporting capacities from 50 kVA to 180 MVA and fully compliant with IEC 60076 international standards, these transformers are tailored for wind and solar power applications.
power transmission

Power Transmission

⦁ High-voltage transmission networks demand power transformers and electrical substation transformer solutions with precise voltage regulation, strong short-circuit withstand capability, and minimal energy losses.
⦁ Pearl Electric’s oil-immersed transformers offer voltage classes from 11 kV to 230 kV and impedance options between 4% and 12%, flexibly matching long-distance transmission requirements.
⦁ Advanced 3D CAD modeling, high-frequency welding, and hydraulic compaction techniques enhance structural integrity and ensure compliance with IEC 60076 standards.
oil-gas industry

Oil&Gas Industry

⦁ Oil & gas installations, such as offshore platforms and gas-fired power stations, require reliable operation in flammable and corrosive environments.
⦁ Pearl Electric delivered 2500 kVA oil-immersed distribution transformers for a Myanmar gas power station, featuring oil-leak-proof design and flame-retardant insulation to maximize safety.
⦁ Optional accessories such as pressure relief devices and explosion vents ensure compliance with the highest industry safety standards.
nuclear energy

Nuclear Energy

⦁ Nuclear power plants impose the highest demands on transformer insulation, fire safety, and seismic resilience.
⦁ Our oil-immersed high voltage transformers use Class A insulation materials, rubber gasket sealing, and core hydraulic compaction to achieve superior insulation levels and seismic strength.
⦁ All units undergo type tests and special tests in independent laboratories, fully complying with IEC 60076 and IAEA safety guidelines.

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Contact Us Today to Explore Your Custom Transformer Solutions

 

Contact Information

Tel: 0086 020 2262 6603
Mob: 0086 188 2624 1798
E-mail: inquiry@pearltransformer.com

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