Electrical safty in low voltage distribution systems up to 1000V a.c and 1500V d.c—Equipment for testing, measuring or monitoring of protective measures—Part 8: Insulation monitoring devices for IT systems
Electrical safety in low voltage distribution systems up to 1000 V a.c. and 1500 V d.c.—Equipment for testing, measuring or monitoring of protective measures—Part 9: Equipment for insulation fault location in IT systems
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