No-MOV protection circuitry

Details No-MOV protection circuitry No-MOV protection circuitry

1996-07-26

1997-03-11

Gaffin, Jeffrey A.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Transient responsive

361 56, H02H 322

Patent

active

056107935

ABSTRACT:
A three-stage surge protection circuit. The surge protection circuit includes input terminals for connection to an electrical power supply system and output terminals for connection to equipment to be protected. The three stages comprise: a surge dissipation stage coupled to the input terminals for storing and dissipating transient surge energy across the input terminals; a current limiting stage comprising a pair of inductors, each of which is coupled in series to a respective conductor from said input terminals, for limiting current surges; and a voltage clamping stage comprising an avalanche diode for accurately clamping the voltage to be supplied to the protected electrical equipment to a predetermined level. The surge protection circuit of the present invention can also be provided in a configuration for protecting electrical equipment powered by a three conductor and/or three-phase power system.

REFERENCES:
patent: 4271446 (1981-06-01), Comstock
patent: 4870528 (1989-09-01), Harford
patent: 4870534 (1989-09-01), Harford
patent: 5038245 (1991-08-01), Gronskog
patent: 5388021 (1995-02-01), Stahl

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