• Three-position disconnectors: Combine the functions of disconnecting and earthing in one device. Three-position disconnectors are typical for gas-insulated switchgear.
• Switch-disconnectors (load-break switches): The combination of a switch and a disconnector, or a switch with isolating distance.
• Contactors: Load breaking devices with a limited short-circuit making or breaking capacity. They are used for high switching rates.
• Disconnectors (isolators): Used for no-load closing and opening operations. Their function is to “isolate” downstream devices so they can be worked on.