Shutoff circuit for sensor controlled switch

Details Shutoff circuit for sensor controlled switch Shutoff circuit for sensor controlled switch

1990-09-19

1992-06-23

Pellinen, A. D.

Electrical transmission or interconnection systems

Switching systems

Condition responsive

363 89, H01H 3500, H01H 8312

Patent

active

051245663

ABSTRACT:
The present invention provides a shutoff circuit for a sensor controlled switching apparatus which does not require an additional high current switch. A two pole low current switch is used with one pole providing a control signal to the high current switch to open the high current switch. The other pole is connected between the AC line and a rectifier for a voltage regulator for the sensor circuitry. The second pole of the low current switch removes the power from the sensor circuitry. By piggy-backing a second pole on the switch, this switch can activate the primary power switch connected in series with the AC line without requiring a separate switch inserted in the AC line itself.

REFERENCES:
patent: 4183071 (1980-01-01), Russell
patent: 4820938 (1989-04-01), Mix et al.
patent: 4874962 (1989-10-01), Hermans
patent: 5001623 (1991-03-01), Magid

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