- No break of transformer current during changing of tap voltages.
- A total of 32 taps provided for smooth changeover of voltages.
- Air insulated circuit breaker with magnetic blow out coil is mechanically coupled with taps of selector for switching in and out of the transition resistor during current transition phase.
- Four cylinder electro-pneumatic air motor to actuate the tap changer at high switching speed in both up and down directions.
- Independent serviceability of loco transformer oil and tap changer oil.
- Manual drive arrangement in case of failure of electrical control of OLTC.
Applications
On Load Single Phase High Voltage Tap Changer Type NO 32 is used on high voltage side of AC electric locomotive transformer to control the voltage of traction motor in both the directions.
Main Subsystems
- Selector
- Circuit breaker
- Air motor
Accessories supporting the subsystems
- Manual hand drive
- ZSM panel
- Selsyn receiver
- Transition resistance
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