Magnetic trip device with wide tripping threshold setting range

Details Magnetic trip device with wide tripping threshold setting range Magnetic trip device with wide tripping threshold setting range

1989-11-02

1990-10-23

Harris, George

Electricity: magnetically operated switches, magnets, and electr

Electromagnetically actuated switches

Tripping means

335176, 335273, H01H 900

Patent

active

049655434

ABSTRACT:
A magnetic trip device having two plunger cores cooperating respectively with polar parts of a fixed magnetic circuit excited by a coil. The effects of the plunger cores are opposing, and by adjusting the inital position of the moving core assembly constituted by these two plunger cores, the tripping thereshold can be adjusted with a large amplitude.

REFERENCES:
patent: 4245204 (1981-01-01), Clausing et al.
patent: 4339421 (1982-07-01), MacLean
patent: 4370637 (1983-01-01), Siffroi
patent: 4710739 (1987-12-01), Heyne et al.

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