Circuit breaker with thermal sensing unit

Details Circuit breaker with thermal sensing unit Circuit breaker with thermal sensing unit

1998-05-06

1999-10-12

Sherry, Michael J.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Circuit interruption by thermal sensing

361105, 361 49, 361 99, H02H 504

Patent

active

059662816

ABSTRACT:
A circuit protection apparatus includes a circuit breaker coupled in series with a circuit to be protected. The circuit breaker has a trip input and is responsive to a trip signal at the trip input for changing from a closed circuit condition to an open circuit condition to thereby remove electrical current from the circuit to be protected. A thermal trip element is coupled in series with the circuit to be protected and is responsive to a predetermined current/time characteristic of current flow in the circuit for delivering the trip signal through the thermal trip element to the trip input.

REFERENCES:
patent: 3716757 (1973-02-01), Rodriguez
patent: 4344958 (1982-08-01), Davidson et al.
patent: 4616200 (1986-10-01), Fixemer et al.
patent: 4816958 (1989-03-01), Belbel et al.
patent: 5245302 (1993-09-01), Brune et al.
patent: 5250918 (1993-10-01), Edds et al.
patent: 5302787 (1994-04-01), Edds et al.
"Bimetal Technology," Demaich Industries, Inc. Brochure, (No date) 70 Mill St. Johnston, RI 02919.

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