Circuit breaker

Details Circuit breaker Circuit breaker

1996-11-13

1999-03-23

Donovan, Lincoln

Electricity: magnetically operated switches, magnets, and electr

Electromagnetically actuated switches

Tripping means

335 18, 335173, 335174, 361 42, 361 50, H01H 900

Patent

active

058866060

ABSTRACT:
In a circuit breaker, a power source current transformer (2) comprises: a secondary coil (6) arranged between two legs (1a and 1b) of a U-shaped part of a main circuit conductor (1), and an iron core (7) including an iron core leg (7a) which penetrates the secondary coil, and yokes (7b and 7b) which embrace the two legs (1a and 1b) of the U-shaped part of the main circuit conductor, the power source current transform supporting the current detecting means. As a result, the power source current transformer (2) is arranged compact inside the main circuit conductor (1), and the main circuit current, when flowing in each of the legs (1a and 1b) of the U-shaped part, produces the magnetic flux output acting on the secondary coil. Hence, even if the main circuit current is small, a great power source output can be obtained.

REFERENCES:
patent: 4037183 (1977-07-01), Gaskill
patent: 4394636 (1983-07-01), Hiraku et al.
patent: 4939491 (1990-07-01), Nissly et al.
patent: 5015983 (1991-05-01), DeRosier et al.
patent: 5252933 (1993-10-01), Kamino et al.
patent: 5276416 (1994-01-01), Ozaki

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