Difference between revisions of "怎样考取低压电工证理论篇"
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怎样考取低压电工证理论篇
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: I 类工具绝缘电阻不超过 2Ω
; V
; 电流频率
: III 类工具电压不超过 50V
; Hz
: 工频电流:工业用电频率的电流,一般 50Hz
: 高频电流:远高于高频电流,一般几百 kHz 至 MHz
;
距离
M
: 10kV 以下,安全距离为 0.35 米
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