DS DSEN 61557-11 2009-APR-22 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 11 Effectveness of resdual current montors RCMs type A and type B n TT TN and T systems
This part of IEC 61557 specifies the requirements for testing equipment applied to the testing of the effectiveness of residual current monitors (RCMs) of Type A and Type B, which are already installed in distribution systems. This test equipment can be used in any kind of network like a TN, TT or IT system. The test equipment may also be used for testing directionally discriminating RCMs in IT-Systems.
