SD alarm

Scope of use

The accessories of this series of circuit breakers are auxiliary functional components specially designed by our company for NDB1 series circuit breakers, which achieve remote tripping control and indication of the on/off status of the line

Main technical parameters

product overview

SD alarm contact

Action characteristics:

When the alarm contact is opened, terminals 91 and 94 are connected; When the alarm contact is closed, terminals 91 and 92 are connected; When the alarm contact is closed and the handle is manually opened, terminals 91 and 92 are still connected; When the assembled circuit breaker trips and opens due to a fault after the alarm contact is closed, terminals 91 and 92 are disconnected, and terminals 91 and 94 are connected;