TRANSFORMADORES DE MEDIDA Y PROTECCION. TRANSFORMADORES DE TENSION
MEASURING TRANSFORMERS AND PROTECTION. VOLTAGE TRANSFORMEERS.
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29.180 / Transformers. Reactors
CTN 207 - Transmission and distribution of electrical energy
IEC 186-A:1970 + MOD.1:1978 (Identical)
IEC 186:1969 (Identical)
IEC 186:1969+186A:70+A1:78 (Identical)
It is cancelled by: UNE 21088-2:1995
