Insulation testing device for gas insulated apparatus
First Claim
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1. An insulation testing device for testing insulation characteristics of a gas insulated apparatus, comprising:
- test voltage generating means for applying an insulation test voltage to a high voltage part of the gas insulated apparatus;
said test voltage generating means having means for alternately generating at least one pair of a voltage of a positive polarity and a voltag of a negative polarity each having a duration shorter than a half period of a commercial frequency voltage and each having a switching impulse waveform with a wave front time of at least 10 μ
sec.
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Abstract
In an insulation testing device for testing insulation characteristics of a gas insulated apparatus, at least one pair of positive and negative polarity impulse voltages each having a duration shorter than a half period of a commercial frequency voltage are applied to the gas insulated apparatus by a test voltage generator.
14 Citations
5 Claims
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1. An insulation testing device for testing insulation characteristics of a gas insulated apparatus, comprising:
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test voltage generating means for applying an insulation test voltage to a high voltage part of the gas insulated apparatus; said test voltage generating means having means for alternately generating at least one pair of a voltage of a positive polarity and a voltag of a negative polarity each having a duration shorter than a half period of a commercial frequency voltage and each having a switching impulse waveform with a wave front time of at least 10 μ
sec. - View Dependent Claims (2)
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3. An insulation testing device for testing insulation characteristics of a gas insulated apparatus by applying an insulation test signal to a high voltage part of the gas insulated apparatus, comprising:
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a voltage source for generating a variable AC voltage; a rectifier for rectifying a predetermined high voltage generated from said voltage source to provide a first high voltage of positive polarity and a second high voltage of negative polarity, respectively; polarity changeover switch means for switching over the output of said rectifier between the positive polarity high voltage and the negative polarity high voltage; and impulse voltage generator means for alternately generating at least one pair of predetermined positive polarity and negative polarity impulse voltages, each having a switching impulse waveform with a wave front time of at least 10 μ
sec and each having a duration shorter than a half period of a commercial frequency voltage, in response to the positive and negative polarity high voltage switched over by said polarity changeover switch means. - View Dependent Claims (4, 5)
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Specification