Tiêu chuẩn quốc tế

• Số hiệu / Standard Number: EN 61557-12:2008
• Năm ban hành / Publication date: 2008
• Tình trạng / Status: A - Còn hiệu lực
• Tên tiếng Anh / Title in English: 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)IEC 61557-12:2007
• Phạm vi áp dụng / Scope of standard: This part of IEC 61557 specifies requirements for combined performance measuring and monitoring devices that measure and monitor the electrical parameters within electrical distribution systems. These requirements also define the performance, in single and three-phase a.c. or d.c. systems having rated voltages up to 1 000 V a.c. or up to 1 500 V d.c. These devices are fixed installed or portable. They are intended to be used indoors and/or outdoors. This standard is not applicable for: • electricity metering equipment that complies with IEC 62053-21, IEC 62053-22 and IEC 62053-23. Nevertheless, uncertainties defined in this standard for active and reactive energy measurement are derived from those defined in the IEC 62053 standards series. • simple remote relays or simple monitoring relays.