20kV / 22kV Oil-Immersed Transformers

Engineered for Reliable Medium-Voltage Power Distribution

YIMENG 20kV / 22kV oil-immersed transformers are specified for medium-voltage power distribution projects, including utility substations, industrial facilities, renewable energy installations and infrastructure developments. Selecting the right voltage ratio and rated capacity helps match the transformer to the network, connected load and planned expansion.

For a 20kV distribution transformer or a 22kV oil transformer, the project specification should define secondary voltage, frequency, vector group and short-circuit impedance. ONAN cooling uses natural oil and air circulation to transfer heat. Copper or aluminum windings, tap arrangements and installation requirements can be reviewed to establish the appropriate configuration.

Transformer selection also involves no-load and load losses, insulation levels, temperature-rise limits, ambient conditions and site clearances. These values depend on the selected design and should be confirmed in the technical schedule. Indoor and outdoor installations require suitable arrangements for ventilation, access and oil containment.

Planning a new substation or upgrading an existing distribution system? Send YIMENG your required kVA rating, 20kV or 22kV primary voltage, secondary voltage, installation location and project requirements. Request a project-specific technical proposal and quotation for an oil-immersed distribution transformer configured for your application.

Natural Cooling

Project Configuration

Winding Options

Engineering Support

Technical Specifications

Parameter	Specification
Product Type	Oil-immersed transformer
Rated Primary Voltage	20 / 22kV / Customizable
Rated Capacity	80kVA/ 200kVA/ 250kVA/ 500kVA/ 800kVA/ 1000kVA/ 1500kVA/ 2000kVA/ 2500kVA/ Customizable
Rated Secondary Voltage	110V/ 220V/ 400V/ 415V/ 433V/ Customizable
Rated Frequency	50 / 60 Hz
Number of Phases	3 Phases
Vector Group	Dyn11/ Yyn0
Cooling Method	ONAN
Tapping Range	±2 × 2.5% or ±5%
Tap Changing Mode	On-Load Tap Changing (OLTC)/ No-Load Tap Changing (NLTC)
Standard	IEC 60076 / GB 1094
Winding Material	Copper / Aluminum
Installation	Indoor / Outdoor
Short-Circuit Impedance(%)	Customizable
No-Load Loss(W)	Customizable
Load Loss(W)	Customizable
No-Load Current(%)	Customizable
Insulation Level(kV)	Customizable
Temperature Rise Limits(K)	Customizable
Insulating Liquid	Customizable
Overall Dimensions (L×W×H)(mm)	Customizable
Oil Mass(kg)	Customizable
Total Mass(kg)	Customizable
Applicable Standard()	Customizable