‘DAV’ Automatic Semaphore Indicators type NTC are used in MIMIC diagram on Control and Instrumentation Panel to indicate open or close position of isolator, Earth switch, Circular Breaker, PT ON/OFF switch. The pointer takes up position of the supervised equipment & it turn right angle when breaker, isolator et is in open position, it takes up intermediate position i.e. 45 degree on failure of supply.
Special features :
- Type Tested as per IS-3231-1965 at IDEMI Bombay.
- High operating torque & positive action.
- Coils are continuously rated for 24-30V DC.
- Withstands 2.5 kV HV-Test
- Very Low Burden (10-30mA)
- Indicator is dust proof.
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