What is the function of a bell alarm lockout?

The function of a bell alarm lockout is specifically designed to prevent the closure of a circuit breaker after it has tripped due to a fault condition. This ensures that the breaker cannot be closed again until the underlying issue has been addressed, thereby protecting the electrical system from potential damage or unsafe conditions that may arise from attempting to restore power prematurely.

In essence, the lockout serves as a safety mechanism, ensuring that operators cannot inadvertently restore power to a circuit that requires attention and investigation following a trip event. This feature is crucial for maintaining system integrity and ensuring the safety of personnel working on or near the equipment.