Oil Immersed Distribution transformerSolar Transformers Oil-Immersed PV Transformer

Oil-Immersed PV Transformer

Rated voltage	6-38.5kv
Rated capacity	30kva-31500kva

Oil-Immersed PV Transformer for Solar Power Stations

The oil-immersed PV transformer is a critical power transmission and distribution device widely used in photovoltaic (PV) power stations. It is commonly installed in pad-mounted substations (PV compact substations) or utilized as a standalone transformer unit.

Its primary function is to step up the medium-voltage output generated by PV inverters — such as 0.8 kV, 10 kV, or 35 kV — to higher grid transmission voltages including 35 kV, 66 kV, or 110 kV, ensuring stable and efficient integration into the power grid.

As the “gateway” of solar power plants, the PV transformer plays an essential role in transmitting clean and renewable solar energy safely and reliably to utility networks.

Key Features of Oil-Immersed PV Transformers

High Temperature Resistance

Strong Overload Capacity

Excellent Harmonic Resistance

Superior Sealing Performance

Energy-Efficient Design

High Reliability & Long Service Life

Technical Parameters of Oil-Immersed PV Transformer

Specification	Details
Installation Conditions	Outdoor installation
Model	S-Series
Rated Capacity	1,000–8,000 kVA
Rated Voltage	High Voltage (kV): 10.5, 33, 34.5, 35, 36.5, 37, 38.5 Low Voltage: 0.4, 0.8, 1.14 Custom specifications supported
Impedance	6.5–10%
Insulation Class	Class A
Vector Group	Dy11, Yd11
Insulation Level	35 kV: LI 170 AC 70 / AC 5
Compliance Standards	EN 60076, IEC 60076, CE