The SD Alarm Switch communicates the trip status of the associated C60, N40 or C120 circuit breakers or supplementary protectors via auxiliary contacts, it is mechanically linked to the protective device. Locally, it also indicates a tripped-on-fault condition of the protective device with a red indicator flag on the front panel (Use the OF Auxiliary Switch for open or closed status).

A test switch allows simulation of the SD function without operating the protective device, and the SD Alarm Switch is reset when the associated protective device is reset, or it may be reset independently of the protective device with a reset lever on its front panel.

The SD Alarm Switch may show the circuit breaker status, using V type signal lamps, other annunciators, or a control system. It may be used in the conjunction with the OF Auxiliary Switch which which presents the open or closed status, the MN Undervotlage Release, and /or the MX+OF Shunt Trip.

If you have any enquiry about quotation or cooperation,please feel free to email us at teatonele@yahoo.com or use the following enquiry form. Our sales representative will contact you within 24 hours. Thank you for your interest in our products.