IEC 61557-12:2021 高达 1 000 V AC 和 1 500 V DC 的低压配电系统中的电气安全 用于测试、测量或监控保护措施的设备 第12部分:功率计量和监控设备(PMD)
Electrical safety in low voltage distribution systems up to 1 000 V AC and 1 500 V DC - Equipment for testing, measuring or monitoring of protective measures - Part 12: Power metering and monitoring devices (PMD)