On-load tap changer for transformer
44 - 132 kV, 300 A | AT series
Brush
The 'AT' range of single-phase compartment units with high-speed resistor transition is designed for three-phase systems with voltages of 44kV and 66kV line end or 132kV neutral end and nominal rated current of 300A. A maximum of 17 tapping steps (18 positions) is possible for linear regulation and 32 steps (33 positions) for reversing or coarse/fine regulation.
The 'AT' tapchanger is designed such that power flow can be handled in either direction at full-rated current. The 'AT' is an "out-of-tank" flange-mounted tapchanger where the oil in the switch compartment is kept separate at all times from the oil in the main transformer.
