Electrical apparatus for mines. Apparatus for control of the insulation of a.c. power systems by injection of d.c. Part 1: Systems with a rated voltage up to 1 100 V.
NORMA vydaná dňa 3.10.2007
Designation standards: UNE 22547-1:2007
Note: NEPLATNÁ
Publication date standards: 3.10.2007
The number of pages: 8
Approximate weight : 24 g (0.05 lbs)
Country: Spanish technical standard
Kategória: Technické normy UNE