发明名称 |
Method for diagnosing an insulation deterioration of an electric apparatus. |
摘要 |
<p>A charging current flows through an insulation for insulating two conductors of an electric apparatus by applying an alternate current voltage thereto. A direct current component of the charging current is detected, and is amplified by biasing a direct current voltage to the alternate current voltage. An insulation deterioration of the electric apparatus is determined by an absolute value of the amplified direct current component.</p> |
申请公布号 |
EP0437214(A2) |
申请公布日期 |
1991.07.17 |
申请号 |
EP19910100103 |
申请日期 |
1991.01.02 |
申请人 |
HITACHI CABLE, LTD. |
发明人 |
SOMA, KENICHIRO;KOTANI, KAZUO;TAKAOKA, NOBUJU |
分类号 |
G01R31/02;G01R31/12 |
主分类号 |
G01R31/02 |
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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