What is the alarm contact for mccb?

The alarm contact for a Molded Case Circuit Breaker (MCCB) is a feature that provides a signal or indication when the circuit breaker operates, typically due to overload, short circuit, or other fault conditions. This contact can be connected to an external alarm system to alert operators or maintenance personnel about the status of the circuit protection. Alarm contacts are usually configured as normally open (NO) or normally closed (NC) and can be integrated into control systems for monitoring purposes.