标准摘要
[中文适用范围]： IEC 61557的本部分规定了适用于测量接地导体、保护接地导体和等电位联结导体（包括其连接和端子）电阻的设备的要求，并标有测量值或限值。 [外文原描述]： This part of IEC 61557 specifies the requirements applicable to equipment for measuring the resistance of earth conductors, protective earth conductors and conductors for equipotential bonding, including their connections and terminals, with an indication of the measured value or indication of limits. This second edition cancels and replaces the first edition published in 1997. This edition constitutes a minor revision.
英文名称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 4: Resistance of earth connection and equipotential bonding