Descriptors | Fuses, Overload protection, Electric regulators, Electrical equipment, Electric control equipment, Electrical components, High-voltage equipment, Electric starters, Switchgear, Control switches, Health and safety requirements, Vacuum circuit-breakers, Contactors, Switches, Circuit-breakers, Transformers, Semiconductors, Instructions for use, Oil circuit-breakers, Electrical insulation, Safety measures, Visual inspection (testing), Maintenance, Air-blast circuit-breakers, Sulfur hexafluoride, Protective relays, Liquid starters |