Số hiệu tiêu chuẩn
prEN 62054-21
Tên tiêu chuẩn
IEC 62054-21: Electricity metering equipment (a.c.) - Tariff and load control - Part 21: Particular requirements for time switches
Ngày phát hành
2002-08-00
Tiêu chuẩn tương đương
DIN EN 62054-21 (2003-05), IDT * C44-119-21PR, IDT * IEC 13/1281/CDV (2002-08), IDT * OEVE/OENORM EN 62054-21 (2002-11-01), IDT
Từ khóa
Control * Electric energy * Electrical engineering * Electronic instruments * Load control * Loading * Properties * Specification (approval) * Switchgear * Tarif time-switches * Tariff * Tariff control * Testing * Testing conditions * Time switches * Timing devices