Circuit interrupter utilizing a closing resistance

Details Circuit interrupter utilizing a closing resistance Circuit interrupter utilizing a closing resistance

1978-12-08

1981-02-10

Scott, James R.

Electricity: circuit makers and breakers

Liquid contact

Time delay

200146R, 200148R, 200325, H01H 3316

Patent

active

042503620

ABSTRACT:
A circuit interrupter for energizing a line includes stationary and movable main contacts, and stationary and movable impedance contacts which are used for inserting a resistance into the circuit upon closing. The movable impedance contact is rotatable with a projection extending outwardly therefrom, which projection, as the movable impedance contact moves towards the stationary impedance contacts, creates a non-uniform electric field distribution between the two impedance contacts. This distribution is especially useful in obtaining coordination between resistor insertion of multiple-interrupting-unit circuit interrupters. The movable impedance contact separates from the stationary impedance contact prior to separation of the main movable contact and the stationary main contact means during the opening operation.

REFERENCES:
patent: 3291947 (1966-12-01), Van Sickle
patent: 4072836 (1978-02-01), Bischofberger et al.

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