Insulation testing method and apparatus therefor

Details Insulation testing method and apparatus therefor Insulation testing method and apparatus therefor

1996-08-02

1999-10-05

Medley, Sally C.

Electricity: electrical systems and devices

Safety and protection of systems and devices

With specific voltage responsive fault sensor

324551, H02H 300

Patent

active

059634103

ABSTRACT:
A voltage value of an impulse voltage repetitively applied on a test-piece coil is increased in accordance with time elapse. A terminal voltage applied on both ends of the test-piece coil is monitored to detect an electric breakdown of the test-piece coil. Upon detecting such a breakdown, application of the impulse voltage is immediately stopped to prevent the test-piece coil from being unnecessarily damaged. Meanwhile, a voltage value of the impulse voltage is measured quantitatively at the time the electric breakdown is detected and the measured data is stored in a memory, so that the memorized data can be used later as a breakdown voltage value.

REFERENCES:
patent: 3515986 (1970-06-01), Peschel
patent: 5514967 (1996-05-01), Zelm

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