Transformadores de potencia. Niveles de aislamiento y ensayos dieléctricos.
POWER TRANSFORMERS. INSULATION LEVELS AND DIELECTRIC TESTS
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29.180 / Transformers. Reactors
CTN 207/SC 14 - Power transformers
HD 398.3 S1:1986 (Identical)
IEC 76-3:1980+A1:1981 MOD. (Identical)
It is cancelled by: UNE-EN 60076-3:2002