Electrical switch with means for switching an auxiliary resistan

Details Electrical switch with means for switching an auxiliary resistan Electrical switch with means for switching an auxiliary resistan

1975-11-12

1978-02-07

Macon, Robert S.

Electricity: circuit makers and breakers

Liquid contact

Time delay

200325, H01H 3316

Patent

active

040728366

ABSTRACT:
An electrical switch is provided with at least one set of stationary and movable main contacts for opening and closing the circuit controlled by it, and a set of stationary and movable auxiliary contacts for connecting a resistor in parallel with the main contacts and hence into the circuit controlled by the switch during a switching-in operation prior to engagement of the main contacts. The resistor is then disconnected either after the main contacts have engaged, or it is disconnected later during a switching-out operation prior to dis-engagement of the main contacts. Both operational modes are effected by means of a follower device which couples the movable auxiliary contact with the movable main contact.

REFERENCES:
patent: 3538276 (1970-11-01), Leeds
patent: 3700840 (1972-10-01), Wilson et al.
patent: 3763340 (1973-10-01), Noack

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