When does the trip indication light extinguish?

The trip indication light extinguishes when the MC handle is placed to coast because this action typically indicates that the power to the motor or device is being interrupted or is put in a safe state, which effectively clears the fault condition that led to the trip. Placing the handle in the coast position allows for safe operation while ensuring that the control circuitry is reset, which is why the trip indication light would turn off.

In contrast, activating the emergency stop would illuminate the trip indication light further, as it indicates a fault condition requiring immediate attention. Turning the master key to the On position generally does not reset faults, but rather establishes power to the system, keeping the trip light illuminated if a fault is present. Similarly, using the trip cock bypass key switch does not address the underlying fault condition; it primarily allows the system to bypass certain safety interlocks, meaning the trip indication light would still indicate a fault until a proper reset procedure, such as moving the MC handle to coast, is executed.