Relay circuit having a pulse generator for closing contacts

Details Relay circuit having a pulse generator for closing contacts Relay circuit having a pulse generator for closing contacts

H - Electricity

01

H

348/39

H01H 47/32 (2006.01) H01H 47/00 (2006.01)

Patent

CA 1285645

"Relay Circuit Having a Pulse Generator for Closing Contacts" ABSTRACT OF THE DISCLOSURE In a relay circuit, a stationary contact of a relay is coupled to a DC voltage source and a moving contact of the relay is coupled to a load circuit. The moving contact is switched to the stationary contact in response to a rapidly rising edge of a DC voltage applied to the relay. A voltage sensor is connected to the moving contact for detecting a voltage which appears thereat. For operating the relay, a switch is closed to apply a voltage from the DC voltage source to a pulse generator. The pulse generator generates a rectangular pulse and applies it to the relay to cause it to switch the moving contact to the stationary contact. If a voltage is not detected by the voltage sensor at the moving contact after energization of the relay, the pulse generator reapplies a rectangular pulse to the relay until a voltage appears at the moving contact, whereupon the pulse generator applies a constant voltage to the relay.

571420

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