Số hiệu tiêu chuẩn
prEN 61557-7
Tên tiêu chuẩn
IEC 61557-7, Ed. 2.0: 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 7: Phase sequence
Ngày phát hành
2005-07-00
Tiêu chuẩn tương đương
C42-198-7PR, IDT * IEC 85/274/CDV (2005-07), IDT * OEVE/OENORM EN 61557-7 (2005-10-01), IDT
Từ khóa
Control instruments * Controlling * Currents * Datum * Definitions * Direct current installations * Direction of rotating field * Distribution systems * Electric mains * Electrical * Electrical engineering * Electrical safety * Electromagnetic tests * Indications * Influence quantity * Inscription * Installations for rated voltages * Instructions for use * Instruments * Limits (mathematics) * Low voltage mains * Low-voltage equipment * Low-voltage installations * Measuring * Measuring equipment * Measuring instruments * Monitoring * Nominal use * Operating instructions * Output voltage * Phase sequence * Plant * Rated current * Rated voltage * Reference conditions * Resistance measurement * Specification (approval) * Specimens * Supply voltages * Test equipment * Testing * Testing set-ups * Use