Automatic electric switch

The utility model discloses an automatic electric switch, including the switch box, the lid, the type of falling U conducting strip, the sheetmetal, the type of falling U conducting strip is connectedwith first terminal through the wire, the sheetmetal is connected with the second terminal through the wire, the bottom of switch box is fixed with sheetmetal drive arrangement, sheetmetal drive arrangement is connected with the sheetmetal, the roof bottom of switch box is fixed with the metallic tank, the metallic tank intussuseption is filled with nitrogen gas and dry powder fire extinguishingagent, the outer wall of metallic tank is fixed with manages and the applying powder mouth with the nitrogen air impact income of metallic tank inner chamber intercommunication, on going into to manage, installs nitrogen air impact the check valve that admits air, the port upper cover with lid of applying powder mouth, the bottom of metallic tank is fixed with the mouth of putting out a fire thatcommunicates with the metal