Anti-misoperation demarcating load switch with disconnecting link

Abstract

The invention discloses an anti-misoperation demarcating load switch with a disconnecting link. The anti-misoperation demarcating load switch with the disconnecting link comprises a demarcating load switch. A clamping tooth (5) and a locking rod (6) are arranged in the shell (7) of the demarcating load switch; a three-position separation disconnecting link is arranged on the line inlet side of the shell (7) of the demarcating load switch, and comprises a disconnecting link body, a fixed contact (1), a moving contact (2), an grounded fixed contact (10) and a disconnecting link transmission shaft (4). A crank connecting rod (11) is connected to the disconnecting link transmission shaft (4); the crank end of the crank connecting rod (11) is connected to the disconnecting link transmission shaft (4), and the connecting end of the crank connecting rod (11) is hinged in the middle of a main disconnecting link (8); the locking rod (6) is connected to the disconnecting link transmission shaft (4), and rotates along with the disconnecting link transmission shaft (4); the far end of the locking rod (6) makes contact with or is separated from the clamping tooth (5) in the shell of the demarcating load switch. The demarcating load switch is time-saving, labor-saving, safe and convenient to operate.

Description

technical field [0001] The invention relates to a boundary load switch, in particular to an anti-misoperation boundary load switch with a knife switch. Background technique [0002] The boundary load switch is a kind of responsibility demarcation point installed on 10KV overhead distribution lines, which can automatically cut off and isolate lines with single-phase ground faults and phase-to-phase short-circuit faults. The existing boundary load switch does not have the function of isolating the knife switch for grounding. When the fault area is determined on the line and the power maintenance work is started, the usual practice is to disconnect the load switch first, then pull the isolating switch, and connect the working grounding wire behind it. The maintenance work can be started. Since the current overhead distribution lines are mainly insulated wires, and the T-connection of the user is generally an insulated wire or a high-voltage cable T-connection, it is impossible ...

AI Technical Summary

Problems solved by technology

The existing boundary load switch does not have the function of isolating the knife switch for grounding. When the fault area is determined on the line and the power maintenance work is started, the usual practice is to disconnect the load switch first, then pull the isolating switch, and connect the working grounding wire behind it. The maintenance work can be started. Since the current overhead distribution lines are mainly insulated wires, and the T-connection of the user is generally an insulated wire or a high-voltage cable T-connection, it is impossible to connect the ground wire without destroying the insulation layer of the wire, and there is a great potential safety hazard.

In order to avoid safety accidents, electric workers usually add special grounding rings or hanging grounding wires at the connection between T-contact wires and wires, and wires and cables. security risks

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