标准摘要
[中文适用范围]： IEC61557 的本部分规定了使用交流电压测量接地电阻的设备的要求。 [外文原描述]： This part of IEC 61557 specifies the requirements for equipment for measuring earth resistance using an a.c. voltage. This second edition cancels and replaces the first edition published in 1997. This edition constitutes a technical revision. The following changes were made with respect to the previous edition: a) Complete revision of the definitions; b) Revision of some requirements.
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 5: Resistance to earth