IEC 61557-12. 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 12. Combined measuring and monitoring devices for electrical performance parameters
IEC 61557-12 交流1000V和直流1500V以下低压配电系统的电气安全 用于测试、测量或监测保护措施的设备 第12部分 电气性能参数的组合测量和监测装置
发布日期:
2005-12-19
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