DS DS/EN 61557-2
DS DSEN 61557-2 2007-APR-04 Electrcal safety n low voltage dstrbuton systems up to 1 000 V ac and 1 500 V dc - Equpment for testng measurng or montorng of protectve measures - Part 2 nsulaton resstance
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This part of IEC 61557 specifies the requirements applicable to equipment for measuring the insulation resistance of equipment and installations in the de-energized state.