发明名称 DEW CONDENSATION DETECTION DEVICE OF SWITCH GEAR
摘要 PROBLEM TO BE SOLVED: To reduce the cost of a switch gear device in which the occurrence of a dew condensation state can be detected.SOLUTION: A dew condensation detection device of a switch gear comprises a sensor 1 having a pair of comb-shaped electrodes on a surface of an insulator, a power supply 2 for applying a voltage to the sensor 1, and a leakage current detector 3 for detecting a leakage current from the sensor 1. Leakage current characteristics to humidity of the sensor 1 are preliminarily measured to define a surface resistivity showing a prescribed leakage current, as a set value, and the sensor 1 is arranged in a switch gear to detect a leakage current from the leakage current detector during operation of the switch gear. The detected leakage current is converted to a surface resistivity, and this surface resistivity is compared with the set value to determine the occurrence of a dew condensation state.
申请公布号 JP2014066533(A) 申请公布日期 2014.04.17
申请号 JP20120210346 申请日期 2012.09.25
申请人 MITSUBISHI ELECTRIC CORP 发明人 YAMAJI YUICHI;OKAZAWA SHU;MIKI SHINSUKE;UMEMURA SONOKO
分类号 G01N27/04;G01N27/00;G01R27/02;G01R31/02;H02B3/00;H02B13/065 主分类号 G01N27/04
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