System and method of isolation for detecting a passive protectiv

Details System and method of isolation for detecting a passive protectiv System and method of isolation for detecting a passive protectiv

1996-04-08

1998-02-03

Gaffin, Jeffrey A.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Generator protective circuits

361 63, 361 93, 361115, H02H 700

Patent

active

057151245

ABSTRACT:
A system and method of protection against the passive loss of differential current fault protection is provided for an electric power generating system (EPGS). The EPGS utilizes a bus power control unit (BPCU) to control and protect bus configuration, and a generator control unit to control each of the generators. This system and method protection protects against perpetuation of a bus fault on a left air vehicle distribution bus, a right air vehicle distribution bus, or a air vehicle tie bus during passive loss of normal differential current fault protection within the BPCU, and comprises circuitry for monitoring parameters of the generator output power, circuitry responsive to these parameters for detecting a high generator current condition for generating an output overload signal when the parameters indicate the presence of a bus fault. Circuitry located within the BPCU responsive to and in coordination with the output overload signal discriminates a location of the bus fault between the left and the right generator buses, the left and the right air vehicle distribution buses, and the air vehicle tie bus by selectively tripping breakers and thereafter monitoring the effect on the output overload signal. If the bus fault is discriminated to be located on the generator's bus, the BPCU allows the air vehicle distribution bus to be re-powered by another generator.

REFERENCES:
patent: 4321645 (1982-03-01), Thom et al.
patent: 4403292 (1983-09-01), Ejzak et al.

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