Power supply circuit cut-off device and method of controlling power supply

摘要

A service plug includes a lever (30) supported on a cover (20) for movement between full and partial locking positions. A housing (90) is connectable to and separable from the cover (20) as the lever (30) is moved. Heavy current terminals (50) are disconnected from a power supply circuit in a separating process of the cover (20). A detection terminal (60) is switched from an ON-state to an OFF-state in the separating process of the cover (20). A stopper (40) contacts restricting walls (25) on the cover (20) to stop a movement of the lever (30) from the full locking position toward the partial locking position until the heavy current terminals (50) are disconnected from the power supply circuit after the detection terminal (60) is switched from the ON-state to the OFF-state in the separating process of the cover (20).

主权项

1. A power supply circuit cut-off device capable of opening and closing a power supply circuit, comprising:
a lever; a cover that supports the lever movably between a first position and a second position, at least one restricting wall projecting from the cover; a housing that is connectable to and separable from the cover as the lever is moved, the cover being separated from the housing by moving the lever from the second position to the first position; at least one power supply terminal that opens the power supply circuit by being disconnected from the power supply circuit in a separating process of the cover; at least one detection terminal that is switched from an ON-state to an OFF-state in the separating process of the cover; and at least one stopper slidably movable on the lever between an initial position and a final position, the stopper at the final position contacting the at least one restricting wall on the cover to stop a movement of the lever from the second position toward the first position until the stopper is slid from the final position to the initial position, thereby delaying movement of the lever to the first position sufficiently after the detection terminal is switched from the ON-state to the OFF-state to prevent a spark when the power supply terminal is disconnected from the power supply circuit while separating the cover.