Bargraph displays for static trip circuit breakers

Details Bargraph displays for static trip circuit breakers Bargraph displays for static trip circuit breakers

1983-01-17

1984-01-31

Saloe, Patrick R.

Electricity: electrical systems and devices

Safety and protection of systems and devices

With specific current responsive fault sensor

361 94, 340722, 340753, 340664, H02H 3093

Patent

active

044293402

ABSTRACT:
Separate bargraph displays controlled by the electronic trip unit of a static trip circuit breaker continuously indicate the magnitude of the highest phase current as a percentage of the log-time delay pickup current setting and the timing out of a long-time delay as a percentage of the applicable long-time trip delay interval for a given phase current in excess of the long-time delay pickup setting.

REFERENCES:
patent: 4038695 (1977-07-01), DePuy
patent: 4097857 (1978-06-01), Miyakawa
patent: 4219858 (1980-08-01), DePuy et al.
patent: 4243985 (1981-01-01), Quayle
patent: 4245318 (1981-01-01), Eckart et al.
patent: 4351012 (1982-09-01), Elms et al.
patent: 4351013 (1982-09-01), Matsko et al.
"Motor Protection Relay IC305MLTA", General Electric Disclosure Bull., Dec 1978.

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