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<http://schema.org/reviewBody>
"The SIST EN IEC 61557-11:2022 about IEC 61557-11:2009 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.This part is to be used in conjunction with IEC 61557-1:2007, Part 1: General requirements."
<https://standards.iteh.ai/catalog/standards/sist/64c1da0f-a77b-4366-865f-7b5396d94d0d/sist-en-iec-61557-11-2022>