Electricity: electrical systems and devices – Safety and protection of systems and devices – With specific current responsive fault sensor
Patent
1990-01-16
1990-09-18
Jennings, Derek S.
Electricity: electrical systems and devices
Safety and protection of systems and devices
With specific current responsive fault sensor
361 87, 364483, H02H 308
Patent
active
049582526
ABSTRACT:
A microprocessor based circuit breaker has a removable rating plug which provides a reference for the current rating of the breaker. The removable rating plug also has an EEPROM to which the microcomputer of the circuit breaker writes for storage, the number of operations of the circuit breaker operating mechanism and a trip history of the breaker in the form of a count of the number of trips weighted by the magnitude of the trip current. The rating plug is periodically removed and plugged into a portable programmer which selectively displays the number of operations and operating history of the circuit breaker. The programmer clears this operating data when recorded and can write into the EEPROM the style and serial number of the circuit breaker with which the rating plug is to be used.
REFERENCES:
patent: 4351013 (1982-09-01), Matsko et al.
patent: 4809125 (1989-02-01), Matsko et al.
patent: 4870531 (1989-09-01), Danek
Jennings Derek S.
Moran M. J.
Westinghouse Electric Corp.
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