Switchgear

A switchgear, comprising:

• a frame forming a gas-tight space therein;
• a main busbar, including a single phase, two phases or three phases, arranged inside the frame;
• and
• at least one three-position disconnector arranged within the gas-tight space, the at least one three-position disconnector including a single phase, two phases or three phases corresponding to the main busbar, and each phase is configured to:
• include a first fixed contact, a second fixed contact, a third fixed contact, and a moving contact;
• the moving contact being configured to connect the first fixed contact and the second fixed contact so that the three-position disconnector is in an isolating-on position, to disconnect the first fixed contact and the second fixed contact so that the three-position disconnector is in an isolating-off position, to connect the second fixed contact and the third fixed contact so that the three-position disconnector is in an earthing position, and to disconnect the second fixed contact and the third fixed contact so that the three-position disconnector is in an earthing-off position,
• wherein the first fixed contact is directly connected to the main busbar, the first fixed contact and the third fixed contact are respectively disposed on both sides of the second fixed contact, and the first fixed contact, the second fixed contact, the third fixed contact, and the moving contact are arranged coaxially and successively along an axial direction so as to lie in the same plane as the main busbar.