Oil-Immersed Transformers

Oil-Immersed Series

Oil-Immersed Transformers

Distribution and power transformers built for industrial, utility, and export projects. Stable thermal performance in harsh conditions, from 30 kVA up to 40,000 kVA.

30 kVA – 40,000 kVA

Matched Products

198

Voltage Class
Rated Capacity

Quality & Compliance

Certified B2B Manufacturing & Laboratory Performance

Every transformer, compact substation, and switchgear unit is engineered under audited ISO quality management systems and type-tested according to IEC 60076 and ANSI C57 international standards.

IAF / CNAS Accredited

ISO 9001:2015 Quality System

Certified Quality Management System covering design, coil winding, vacuum drying, oil filling, and routine testing of 10kV–35kV distribution transformers.

Environmental System

ISO 14001:2015 Environmental

Environmental Management System certifying low-loss eco-designed core assemblies, zero PCB insulation oil, and environmentally safe production controls.

Occupational Health

ISO 45001:2018 Safety System

Occupational Health and Safety Management System ensuring safety containment in high-voltage testing bays and factory assembly protocols.

CNAS Lab Type Tests

IEC 60076 & GB Type Tests

Complete routine and type test records (temperature rise, impulse voltage withstand, short-circuit withstand) conducted at CNAS-accredited national research institutes.

SGS Audited Supplier

SGS Verified Manufacturer Audit

On-site factory audit certificate by SGS / Made-in-China, verifying manufacturing premises, export capacity, assembly lines, and legal qualification.

≥180 Units/Yr Export

International Delivery Certificate

Verified annual supply performance and delivery certificate for overseas power grid EPC and industrial infrastructure projects (Mozambique, Nigeria, Kenya, SEA).

Factory & Testing

See XinHuan in Action

Factory tours, transformer testing, and production walkthroughs straight from our Hefei manufacturing base.

Company Tour

Corporate & Factory Tour

Hefei manufacturing base, automated workshops, and high-voltage testing laboratory.

Oil-Immersed

Oil Transformer Routine Testing

100% IEC 60076 voltage ratio, winding resistance, and dielectric routine testing.

Dry-Type

Cast Resin Dry-Type Quality

Epoxy resin vacuum casting, partial discharge testing, and temperature monitoring.

Pad-Mounted Substation

Pad-Mounted Substation

Compact outdoor substation assembly with loop-feed and dead-front safety design.

Production Line

Transformer Production Floor

Automated coil winding, precision core stacking, and vacuum drying chambers.

Switchgear

High-Voltage Switchgear

Vacuum circuit breakers, copper busbar routing, and relay protection cabinets.

Compact Substation

European Compact Substation

Prefabricated kiosk substation panel wiring, RMU integration, and LV distribution.

Dry-Type Assembly

Dry-Type Production Line

Copper foil winding, vacuum resin casting molds, and core-coil assembly.

Production Archives & Virtual Tours: Watch routine testing procedures, FAT walkthroughs & workshops.
360° Virtual Tour · XinHuan Factory Channel · XinHuan Testing Channel