Alarm Switch (AL)
Alarm switches offer provisions for immediate audio or visual indication of a tripped
breaker due to overload, short-circuit, operation of shunt trip, or undervoltage trip
conditions, operation of push button.
They are particularly useful in automated plants where operators must be signaled
about changes in the electrical distribution system. This switch features a closed
contact when the circuit breaker is tripped automatically. In other words, this switch
does not function when the breaker is operated manually. Its contact is open when
the circuit breaker is reset.