Inverter lockout circuit

Details Inverter lockout circuit Inverter lockout circuit

1976-01-02

1977-12-13

Schaefer, Robert K.

Electrical transmission or interconnection systems

Plural supply circuits or sources

Substitute or emergency source

307 66, 307326, 363 56, H02J 900

Patent

active

040631087

ABSTRACT:
An emergency lighting system includes a switching transistor inverter circuit for starting and operating a fluorescent lamp from a battery upon failure of line voltage. A lockout arrangement serves to shut down inverter operation should the lamp be removed from its fixture. Included is an interlock in the lamp fixture and circuitry responsive to an open condition at the interlock to ground the input to a system controller inhibit function thereby to effect removal of battery power from the inverter circuit.

REFERENCES:
patent: 3356891 (1967-12-01), Godard
patent: 3919621 (1975-11-01), Wechsler
patent: 3921005 (1975-11-01), Watrous

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