PARARRAYOS DE RESISTENCIA VARIABLE PARA REDES DE CORRIENTE ALTERNA
LIGHTNING ARRESTERS. PART 1: NON-LINEAR RESISTOR TYPE ARRESTERS FOR A. C. SYSTEMS.
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CTN 207 - Transmission and distribution of electrical energy
IEC 99- 1:70 (Identical)
IEC 99-1:1970 (Identical)
It is cancelled by: UNE-EN 60099-1:1996
Cancel: UNE 21087:1970