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power transformers


220kV Power Transformer

Engineered for high-voltage transmission networks, 220kV oil-immersed power transformers support reliable voltage transformation across major substations and interconnected grids. Designed around project-specific requirements, they provide efficient power transfer for utility and industrial applications.

31,500–240,000 kVA

Rated Capacity

220 / 230 kV

Rated Voltage

Oil-Immersed

Type

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applications


High-Voltage Transmission Networks

Grid Substations

Power Generation Facilities

Regional Grid Interconnections

Large Industrial Power Systems

Renewable Energy Grid Integration

technical specifications


category

specification

rated capacity

31,500–240,000 kVA

rated voltage

220 kV class

vector group

YNd11 / YNyn0d11

impedance

12–14%

cooling method

ONAN

insulation level

245 kV class; LI 850–1050 kV / SI 750–850 kV (reference levels)

tap changer

OLTC

frequency

50 / 60 Hz

applicable standards

IEC 60076 / IEEE C57 series, as applicable

operating conditions


category

specification

ambient temperature

-25°C to +40°C

relative humidity

Up to 95% (non-condensing, reference)

altitude

≤ 1,000 m above sea level

installation environment

Outdoor installation; free from excessive pollution, corrosive gases, and abnormal vibration

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