发明名称 |
METHOD OF DIAGNOSING THE DETERIORATION OF A ZINC OXIDE TYPE LIGHTING ARRESTER |
摘要 |
A method of diagnosing the deterioration of a zinc oxide type lighting arrester having one or more series-connected non-linear resistance elements including steps of elimination of the effects of capacitive currents from phase currents; obtaining a synthesized waveform using a window type transformer based on the resistance elements alone; and diagnosing the presence of a deteriorated non-linear resistance element by generating a first pulse voltage when the maximum crest value of the synthesized waveforms exceeds a predetermined value, generating a second pulse voltage representative of terminal voltage of the resistance element, and calculating the difference between the first and second pulse voltages. |
申请公布号 |
SE8703817(D0) |
申请公布日期 |
1987.10.02 |
申请号 |
SE19870003817 |
申请日期 |
1987.10.02 |
申请人 |
FUJI ELECTRIC CO LTD |
发明人 |
H * IWAI;M * NAKAJIMA;H * ASAGA;N * TAKAO;S * SHIGA;Y * TANABE |
分类号 |
G01R27/16;G01R31/00;(IPC1-7):G01R31/02 |
主分类号 |
G01R27/16 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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