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 12: Performance measuring and monitoring devices (PMD)
交流1000V和直流1500V以下低压配电系统的电气安全保护措施的试验、测量或监测设备第12部分:性能测量和监测装置(PMD)