Vacuum circuit interrupter with insulated vacuum monitor resisto

Details Vacuum circuit interrupter with insulated vacuum monitor resisto Vacuum circuit interrupter with insulated vacuum monitor resisto

1981-01-19

1983-09-06

Grimley, A. T.

Electricity: circuit makers and breakers

Liquid contact

Time delay

200 50AA, H01H 3300

Patent

active

044031246

ABSTRACT:
A vacuum circuit interrupter as taught which utilizes the vapor deposition shields thereof in the existing high voltage source or network which is controlled by the circuit interrupter to produce a cold cathode ion detector for determining the quality or amount of vacuum within the vacuum circuit interrupter. The central shield support ring which protrudes through the insulating casing of the circuit interrupter is used to supply ion current to a current detecting bridge through a circumferentially insulated surge resistor and from there to the common terminal of the aforementioned voltage source to thereby return one of the plates of the ion detecting device to the voltage source.

REFERENCES:
patent: 3575656 (1971-04-01), Watrous, Jr.
patent: 4103291 (1978-07-01), Howe

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