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Prefabricated substation · American-type

ZGS Combined Transformer (American-Type)

ZGS series

Transformer body, HV load switch and fuses immersed in insulating oil, with LV metering and compensation as required.

Rated capacity
200–4000kVA
High voltage
7.2–40.5kV
Altitude
≤ 5000m
Ratings and dimensions
ZGS Combined Transformer (American-Type)

Overview

The ZGS series combined transformer immerses the transformer body, high-voltage load switch, fuse and other components in insulating oil, and configures low-voltage metering and compensation as required.

It suits ring-network or terminal distribution systems and new-energy photovoltaic and wind power with cable transmission.

Ratings

ZGS prefabricated substation parameters

ItemUnitParameter
Rated voltagekVLow voltage 0.315–1.14; high voltage 7.2–40.5
Rated frequencyHz50
Rated capacitykVA200–4000
Rated short-time withstand voltagekV/1 minLow voltage 5; high voltage 85
Protection grade—Below IP65
Energy-efficiency level—Grade 1–3
Transformer type—Oil-immersed transformer
Switch type—Low voltage: fixed type; high voltage: oil-immersed load switch + fuse
Breaking current—Low voltage: 50–100 kA; high voltage: 20–40 kA

ZGS combined transformer input / output

ItemUnitInputOutput
Rated voltagekV0.4 / 0.54 / 0.69 / 0.8 / 0.95 / 1.1412 / 40.5
Rated frequencyHz5050
Rated capacitykVA500, 630, 800, 900, 1250, 1600, 2000, 2500, 3150, 3300, 3500, 4000
Rated short-time withstand voltagekV/1 min585
Neutral point—Earthed / unearthedEarthed / unearthed

Design and performance

Functional features

Compact
The same capacity volume is 20% smaller than European-type and Chinese-type substations.
Quiet
Low noise, full self-cooling operation.
Flexible
Flexible installation and easy operation.
Overload
Strong overload capacity.
Efficiency
High energy-efficiency level.
Sealing
Protection grade up to IP65.
Altitude
Suitable for installation below 5000 m.

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Need a rating that is not listed?

Send the capacity, voltage ratio, vector group, impedance and site conditions. Engineering confirms the design against the approved project specification.

Certificates and reports