Method of testing and verifying a performance for insulation to

Details Method of testing and verifying a performance for insulation to Method of testing and verifying a performance for insulation to

1983-08-15

1985-10-22

Krawczewicz, Stanley T.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Frequency of cyclic current or voltage

G01R 3112

Patent

active

045491321

ABSTRACT:
There is disclosed a method of testing and verifying a performance for insulation to ground of a disconnecting switch when breaking a charging current. This disconnecting switch has a movable electrode and a fixed electrode which are arranged in a tank so as to face each other. One of these electrodes is connected to an electrostatic capacity load and the other is connected to a power supply. This test method comprises the steps of: applying a voltage from the power supply through the disconnecting switch to the load to cause the voltage to be trapped in the load; and applying a voltage of the polarity opposite to that of the trapped charged voltage from the power supply to the disconnecting switch to cause the discharge between those electrodes, thereby verifying the performance for insulation to ground.

REFERENCES:
patent: 2916697 (1959-12-01), Boode
patent: 2923879 (1960-02-01), Povey
patent: 2977531 (1961-03-01), Humes et al.
Nishiwaki et al., Ground Fault by Restriking Surge of SF.sub.6 Gas-Insulated Disconnecting Switch & Its Synthetic Tests, IEEE, 82 WM 187-3, 1982, pp. 1-9.

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