Electricity: magnetically operated switches – magnets – and electr – Electromagnetically actuated switches – Automatic circuit-interrupting devices
Patent
1979-06-15
1986-11-04
Harris, George
Electricity: magnetically operated switches, magnets, and electr
Electromagnetically actuated switches
Automatic circuit-interrupting devices
335176, H01H 7174
Patent
active
RE0322792
ABSTRACT:
A trippiong device of a circuit-breaker is detachable so as to be able to cover ranges of excess currents with a small number of calibers each represented by an interchangeable tripping device. For this purpose, the magnetic excess current detection circuits are made in two detachable parts, one fixed to the tripping device, the other installed floating on the housing of the device to be controlled whose interchangeability permits the automatic changing of the magnetic characteristics of the tripping device.
REFERENCES:
patent: 3559120 (1971-01-01), Myers
patent: 3906414 (1975-09-01), Kidd et al.
patent: 4037183 (1977-07-01), Gaskill
patent: 4064469 (1977-12-01), Gryctko
Circuit Breakers, Series Novomax, pp. 2, 24, 26, 28, 30.
Harris George
Unelec S.A.
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