Apparatus and method for protecting the contacts of an electrica

Electricity: electrical systems and devices – Safety and protection of systems and devices – Arc suppression at switching point

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361 5, 361 6, 361 8, 361 11, 361 91, 361 93, 335156, 340547, 340545, H02H 320

Patent

active

048477192

ABSTRACT:
The contacts of an electrical switch, such as a magnetic contact reed switch or a magnetic contact reed relay used in a burglar alarm system, are protected from being fused together by transient current surges. This protection is accomplished by providing a normally nonconductive shunting path in parallel with the switch. The shunting path includes a voltage responsive device which is biased to conduction in response to a current surge to thereby complete the shunting path and allow the current surge to bypass the switch.

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