Power surge transient voltage protection and filtering circuit h

Details Power surge transient voltage protection and filtering circuit h Power surge transient voltage protection and filtering circuit h

1992-06-05

1995-02-21

Hoff, Marc S.

Electricity: electrical systems and devices

Safety and protection of systems and devices

High voltage dissipation

361 56, 361 91, 361111, H02H 904

Patent

active

053921887

ABSTRACT:
A power surge and transient voltage protection circuit includes a plurality of MOVs connected across power conductors leading to a load. The MOVs are in parallel with each other and in parallel with a selenium suppressor and with a capacitor. The selenium suppressor element has a minimum turn-on clamping voltage associated therewith that is below a voltage level that may cause damage to the load if such voltage were applied to the load. Each of MOVs has a minimum turn-on clamping voltage that is above that of the selenium suppressor, yet is still below that voltage level that could damage the load. The plurality of MOVs shunt a portion of a current across the supply conductors around the selenium suppressor as a rising voltage exceeds the selenium suppressor turn-on voltage. The circuit can be used in conjunction with surge and transient protection elements located within a circuit breaker panel, a circuit breaker or circuit breaker housing or a similar convenient module to be installed in a circuit breaker panel, or electrical distribution or meter box whereby losses associated with a line conductor connecting the circuit and the panel can be accommodated in the overall V/I curves associated with the networks. The circuits on the panel and/or on supanels or modules can have elements that are incorporated in the present circuit.

REFERENCES:
patent: 4587588 (1986-05-01), Goldstein
patent: 4642733 (1987-02-01), Schacht
patent: 4675772 (1987-06-01), Epstein
patent: 4677518 (1987-06-01), Hershfield

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