BS/ EN/ IEC 62053-22 Electricity metering equipment (a.c.) - Particular requirements - Part 22: Static meters for active energy (classes 0,2 S and 0,5 S)

BS/ EN/ IEC 61557-12 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

GB/T 22264.7-2008 安装式数字显示电测量仪表 第7部分:多功能仪表的特殊要求

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