Switch

A switch comprising:

• a fixed contact;
• a movable contact:
• installed on a movable contactor that is rotationally movable having a rod-shape;
• and
• separated from the fixed contact along with rotational movement of the movable contactor;
• a grid made of metal disposed to face the fixed contact in a second direction that is a direction orthogonal to a first direction and along a longitudinal direction of the movable contactor, the first direction being a movable direction of the movable contact;
• and
• at least one insulator installed between the grid and the fixed contact, wherein
• the grid includes two side surface portions that face each other with the movable contact interposed therebetween in a third direction that is a direction orthogonal to each of the first direction and the second direction, and
• the insulator is installed between at least one of the two side surface portions and the fixed contact, wherein
• the grid is adapted to return a gas flow back around the movable contact and the fixed contact, the gas flow being generated between the movable contact and the fixed contact during an opening operation in which the movable contact is moved away from the fixed contact, and flowing along the second direction from the movable contact and the fixed contact toward the grid.