ABOUT HUARUI ELECTRIC

Experience Refined, Quality Delivered

Huarui Electric focuses on the transformer sector, integrating mature manufacturing techniques with rigorous quality control. We provide stable, reliable, and cost-effective transformer products—your trusted partner in power solutions.

45-Day

Price Protection Guaranteed

5+ GW

Projects Enabled Globally

Save Up to 30%

By going direct to the factory

SOLUTIONS WE PROVIDE

Our Products

Power Transformers

High-capacity solutions for utility and generation projects. Up to 50 MVA / 34.5 kV with OLTC designs. Tested ester-oil models delivered through HUARUI for proven performance and bankability

Specifications
  • Duty, Type Outdoor / Indoor
  • Voltage Class 13.8kV-34.5kV
  • No of Phases 3Ph
  • Frequency 60Hz
  • Vector Group Dyn5 or Dyn11, Ynyn0 or Customer specific
  • Insulating Fluid Oil
  • Class of Insulation Class A
  • Tap Changer OFTC or OLTC
  • Tapping Range ±2.5% × 2 steps (typical) / As per spec.
  • Winding Material Aluminium / Copper
  • Applicable Standards IEC60076, ANSI, Ecodesign, AS/NZS, BS
  • Painting Enamel, Epoxy, Polyurethane or Customer Specific

Distribution Transformers

Compact and efficient for steady power delivery. 10 kVA – 5 MVA (up to 13.8 kV). Hermetically sealed or corrugated radiator cooling. Oil-filled and dry-type options built through HUARUI for quality and consistency.

Specifications
  • Duty, Type Outdoor
  • Voltage Class 4.16kV-13.8kV
  • No of Phases 3Ph
  • Frequency 60Hz
  • Vector Group Dyn5 or Dyn11, Ynyn0 or Customer specific
  • Insulating Fluid Oil
  • Class of Insulation Class A-H
  • Tap Changer OLTC with RTCC
  • Tapping Range ±5% to ±10% in 1.25% steps / As per spec.
  • Winding Material Copper
  • Applicable Standards IEC60076, ANSI, Ecodesign, AS/NZS, BS
  • Painting Enamel, Epoxy, Polyurethane or Customer Specific
Our Values

Pad-Mounted Transformers

Pre-engineered for renewables and urban networks. Up to 10 MVA / 34.5 kV class. Oil- cooled, tamper-proof designs. Factory-tested through HUARUI for long service life and easy installation.

Specifications
  • Duty, Type Outdoor
  • Voltage Class 13.8kV-34.5kV
  • No of Phases 3Ph
  • Frequency 60Hz
  • Vector Group Dyn5 or Dyn11, Ynyn0 or Customer specific
  • Insulating Fluid Oil
  • Class of Insulation Class A
  • Tap Changer OFTC or OLTC
  • Tapping Range As per customer specs.
  • Winding Material Aluminium / Copper
  • Applicable Standards IEC 60076, ANSI, Ecodesign, AS/NZS, BS
  • Painting Enamel, Epoxy, Polyurethane or Customer Specific

Dry-Type Transformers

Safe, maintenance-free indoor solutions. 13.8 – 34.5 kV range, copper windings, epoxy or polyester finish. Manufactured through HUARUI for fire-safe and space- efficient applications.

Specifications
  • Duty, Type Indoor
  • Voltage Class 13.8kV-34.5kV
  • No of Phases 3Ph
  • Frequency 60Hz
  • Vector Group Dyn5 or Dyn11, Ynyn0 or Customer specific
  • Insulating Fluid AN/AF
  • Class of Insulation Class F/H
  • Tap Changer OFTC
  • Tapping Range ±2.5% × 2 steps (typical) / As per spec.
  • Winding Material Aluminium / Copper
  • Applicable Standards IEC60076, ANSI, Ecodesign, AS/NZS, BS
  • Painting Epoxy, Polyster or Customer Specific

Dry-type Transformers (OLTC)

Employing a vacuum on-load tap changer, it achieves arc-free and safe voltage regulation. Suitable for voltage levels of 35kV and below, Manufactured through HUARUI for precision industrial and power distribution scenarios requiring stable voltage.

Specifications
  • Duty, Type Indoor
  • Voltage Class 13.8kV-34.5kV
  • No of Phases 3Ph
  • Frequency 60Hz
  • Vector Group Dyn5 or Dyn11, Ynyn0 or Customer specific
  • Insulating Fluid AN/AF
  • Class of Insulation Class F/H
  • Tap Changer OLTC
  • Tapping Range As per customer specs.
  • Winding Material Aluminium / Copper
  • Applicable Standards IEC60076, IEC61378, Ecodesign
  • Painting Enamel, Epoxy, Powder coating or Customer Specific

Oil-filled Transformers

Proven endurance for heavy-duty projects. Up to 180 MVA / 110 kV, copper or aluminum wound. Ester and mineral oil options are produced through HUARUI for sustainable grid operations.

Specifications
  • Duty, Type Indoor, Outdoor
  • Voltage Class 13.8kV-115kV
  • No of Phases 3Ph
  • Frequency 60Hz
  • Vector Group Dyn5 or Dyn11, Ynyn0 or Customer specific
  • Insulating Fluid Oil
  • Class of Insulation Class A-H
  • Tap Changer OFTC,OLTC with RTCC
  • Tapping Range As per customer specs.
  • Winding Material Aluminium / Copper
  • Applicable Standards IEC60076, ANSI, Ecodesign, AS/NZS, BS
  • Painting Enamel, Epoxy, Polythine or Customer Sepcific

OUR VALUES

The best part? Production takes weeks, not months.

Our Values

  • Flexible Customization

    Tailored for US voltages (60Hz) & unique needs—no rigid assembly lines.

  • Fast Decisions

    Direct access to management, quick responses, no corporate red tape.

  • Cost-Effective

    No brand markups—just quality materials at fair prices.

  • Focused Expertise

    Specialized in transformers, committed to every detail.

  • US Standard Compliant

    Designed to UL/IEEE/ANSI standards for the US grid.

  • Direct Factory Access

    Video inspections & shop-floor talks—total transparency.

Our Values
Transformer Map

Our Global Footprint

Our products are sold all over the world: the Americas, Africa, Russia, Central Asia and Southeast Asia.

Manufacturing facilities

TESTIMONIALS

What our clients say...

  • Coordination and clarity from HUARUI kept our project moving without delays or surprises.

    Senior Project Manager

  • Their engineering support and responsive communication made the procurement process smooth from RFQ to delivery.

    Supply Chain Manager

  • The quality and finish of each unit exceeded expectations and helped our team hit aggressive commissioning dates.

    VP Procurement

Notable Projects

  • Location: North America
    Syncarpha - Belfast Project

  • Location: North America
    Nidec Dogfish Project

  • Location: North America
    Canada Project

  • Location: South America, Valle Escondido Chile
    Solar Project

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