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发表于 2020-11-17 16:54:48
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本帖最后由 DaoDao1997 于 2020-11-17 16:56 编辑
RCDs are very effective devices to provide protection against fire risk due to insulation fault because they can detect leakage currents (ex : 300 mA) which are too low for the other protections, but sufficient to cause a fire. |
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