IEC 60255-3:1989
Electrical relays - Part 3: Single input energizing quantity measuring relays with dependent or independent time
Definitions. Standard values relating to energizing quantities influencing quantities. Fundamental characteristics relating to temperature rises and behaviour in service. Accuracy requirements relating to the characteristic quantity and specified times. Mechanical and electrical requirements. Markings and data. Methods of measurement. The contents of the corrigendum of September 1992 have been included in this copy.
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