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Article | REF: R1040 V2

Electrical safety testers

Authors: André LECONTE, Bernard KANTOROWSKI

Publication date: December 10, 2004 | Lire en français

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    8. Permanent insulation monitors for IT networks

    8.1 Operating principle

    These devices are designed to be installed in fixed positions to continuously monitor the earth insulation of IT networks where no point is connected to earth. However, the advantages of this formula disappear if the insulation develops a fault, and the purpose of these controllers is to trigger an alarm when the insulation resistance falls below a pre-programmed level.

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    8.2 Permanent insulation monitors for AC networks

    The principle adopted is to measure insulation by means...

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