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IEC 61557-9   2023   Electrical safety in low voltage distribution systems up to 1 000 V a.c. and 1 500 V d.c. Equipment for testing, measuring or monitoring of protective measures Part 9: Equipment for insulation fault location in IT systems - Edition 3.0 30 $
IEC 61557-9   2014   Electrical safety in low voltage distribution systems up to 1 000 V a.c. and 1 500 V d.c. Equipment for testing, measuring or monitoring of protective measures Part 9: Equipment for insulation fault location in IT systems - Edition 3.0 30 $
IEC 61557-9   2009   Electrical safety in low voltage distribution systems up to 1 000 V a.c. and 1 500 V d.c. Equipment for testing, measuring or monitoring of protective measures Part 9: Equipment for insulation fault location in IT systems - Edition 3.0 20 $