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Reciprocating internal combustion engine driven alternating current generating sets. Part 12. Emergency power supply to safety services
Document status: Active
Cross-overs section insulators frogs for tramway and trolleybus catenary suspensions. General specifications
Document status: Active
Gate-type shut off valves for steam electric stations. Types and main parameters
Document status: Active
Power supply systems, networks sources, converters and receivers of electric energy. Rated voltages above 1000 V
Document status: Active
Porcelain and glass pin type insulators for voltage level up to 1000 V. General specifications
Document status: Active
Explosive atmospheres. Part 1. Equipment protection by flameproof enclosures 'd'
Document status: Cancelled