标准摘要
[中文适用范围]： 涉及用于测试三相配电系统相序的测量设备。相序的指示可以是机械的、视觉的和/或听觉的。 [外文原描述]： Specifies requirements for measuring equipment applied to testing th e phase sequence in three-phase distribution systems. Indication of the phase sequence may be mechanical, visual and/or audible.
英文名称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 7: Phase sequence