Relay supervision system

Details Relay supervision system Relay supervision system

H - Electricity

02

H

348/39

H02H 7/00 (2006.01)

Patent

CA 1309159

RELAY SUPERVISION SYSTEM Abstract A relay supervision system is disclosed to check the presence and operability both of a relay and the associated circuitry located at a position remote from the control unit which effects the supervision. The supervision is accomplished by pulsing the relay with energy at a volt-time integral less than that required to energize the relay, but sufficient to cause current flow through the winding and its associated circuit components. If the relay includes two separate windings, each winding can be separately pulsed at different times and both windings effectively supervised without changing the position of the contact sets operated by the windings.

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