Digital protective relay apparatus

Details Digital protective relay apparatus Digital protective relay apparatus

1992-07-02

1994-03-08

DeBoer, Todd

Electricity: electrical systems and devices

Safety and protection of systems and devices

Feeder protection in distribution networks

361 87, 364483, H02H 308

Patent

active

052932958

ABSTRACT:
A digital protective relay apparatus comprising an analog input section, a correction value-calculating section, a storage section, a correction section, a protective calculation section. A correction value for correcting the error of the analog input section is predetermined and stored in the storage section. Digital data obtained through the analog input circuit is corrected by the correction section using the correction value. The protective calculation section performs predetermined calculation using the corrected digital data, thereby determining whether or not a trip instruction should be supplied to a breaker.

REFERENCES:
patent: 4275429 (1981-06-01), Church et al.
patent: 4321681 (1982-03-01), Sackin et al.
patent: 4536815 (1985-08-01), Li et al.
patent: 4709295 (1987-11-01), Yamaura et al.
patent: 4825326 (1989-04-01), Andow et al.
patent: 4841405 (1989-06-01), Udren

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