Disconnecting switch

Details Disconnecting switch Disconnecting switch

1989-11-06

1992-02-25

Scott, J. R.

Electricity: circuit makers and breakers

Liquid contact

Time delay

H01H 3302

Patent

active

050916149

ABSTRACT:
A disconnecting switch has two switches, wherein a first switch comprising a sliding arc contact, which is spring biased, is connected with a resistor in series, and a second switch comprising a main state contact is connected with the first switch with the resistor in parallel. A movable contact is driven so as to contact both the sliding arc contact over a given distance and the main static contact at a given position of the given distance. When the disconnecting switch is interrupted, the second switch is opened first and then the first switch is opened. Current limiting action due to the resistor enables easy interruption of the disconnecting switch.

REFERENCES:
patent: 2401963 (1946-06-01), Rietz et al.
patent: 3912974 (1975-10-01), Hill
patent: 4069406 (1978-01-01), Meinders

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