Description
Voltage Ratings: From low voltage (few kV) to ultra-high voltage (up to 765
kV and beyond)
Power Capacity: From a few kVA to several hundred MVA
Cooling Types: Oil-immersed (ONAN, ONAF, OFAF), dry-type (air-cooled)
Construction: Core and coil assembly designed for minimal losses and
mechanical strength
Tap Changer: On-load or off-load tap changers for voltage regulation
Insulation: High-quality insulation for reliable operation under electrical stress
Protection: Equipped with Buchholz relay, pressure relief devices, temperature
sensors, and breather pots
Rated Voltage: Low voltage side (e.g., 400V) to high voltage side (e.g., 132kV
or above)
Power Rating: 100 kVA to 500 MVA or more
Frequency: 50 Hz / 60 Hz
Impedance Voltage: Typically 5% to 10%
Cooling Class: ONAN, ONAF, OFAF, Air Natural (AN), Air Forced (AF)
Standards Compliance: IEC 60076, IEEE C57 series
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