Corrigendum 1 - Amendment 1 - Electricity metering equipment (A.C.) - General requirements, tests and test conditions - Part 21: Tariff and load control equipment— 1 стр.
91.140.50 Electricity. Including electric energy meters in buildings, emergency electrical supplies, etc. / Системы электроснабжения. Включая аварийное электроснабжение и т.д.
