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Can earth leakage relays and insulation monitoring be used together?

Chen Yannis

When designing a complex system that incorporates different grounding types (TN/TT and IT), we must consider the safety characteristics of each. How can we cleverly utilize earth leakage relays and insulation monitoring devices to improve safety?

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    Chen Yannis said:
    How can we cleverly utilize earth leakage relays and insulation monitoring devices to improve safety?

    Please could you be more specific? What safety issues did you have in mind?

    Where ADS is used in TN, TT and IT systems, IEC 60364-4-41, 411.3.1.1, requires that simultaneously-accessible exposed-conductive-parts are already connected to the same earthing system, which helps control touch-voltage.

    There are, additionally, provisions in 411 of IEC 60364-4-41 to ensure safety.

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    Chen Yannis said:
    How can we cleverly utilize earth leakage relays and insulation monitoring devices to improve safety?

    Please could you be more specific? What safety issues did you have in mind?

    Where ADS is used in TN, TT and IT systems, IEC 60364-4-41, 411.3.1.1, requires that simultaneously-accessible exposed-conductive-parts are already connected to the same earthing system, which helps control touch-voltage.

    There are, additionally, provisions in 411 of IEC 60364-4-41 to ensure safety.

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