Tekst fra IEC om High-voltage switchgear and controlgear
To prepare international standards regarding specifications for high-voltage switchgear and controlgear rated above 1 kV a.c. or above 1,5 kV d.c.
Tekst fra IEC om High-voltage switchgear and controlgear assemblies
To prepare international standards covering prefabricated assemblies which are combination of one or more parts of switchgear and controlgear exceeding 1 kV a.c., together with associated control and power equipment, measuring, signalling, protective, regulating equipment etc.
Gas-insulated transmission lines are in the scope of SC 17C.