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BS EN 61557-4:1997

Заменен
Electrical safety in low voltage distribution systems up to 1000 V a.c. and 1500 V d.c. Equipment for testing, measuring ormonitoring of protective measures, Resistance of earth connection and equipotential bonding — 10 стр.
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Ссылочные документы

BS EN 61557-4:2007
Действует
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, Resistance of earth connection and equipotential bonding — 12 стр.

На этот документ ссылаются

BS EN 61557-1:1997
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BS EN 61557-4:2007
Действует
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, Resistance of earth connection and equipotential bonding — 12 стр.