Loop self-locking load switch
A load switch and self-locking technology, applied in the direction of air switch components, etc., can solve problems such as short circuit accidents, affecting power supply, electrical load and grounding cannot be closed at the same time, and achieve the effect of preventing simultaneous closing
Inactive Publication Date: 2013-06-12
中黔电气集团股份有限公司
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Problems solved by technology
[0002] In the existing split load switch, the load switch and the grounding switch are independent of each other and can be operated independently through their respective mechanisms. In order to meet the requirements of the electrical load and grounding that cannot be closed at the same time, it is realized by blocking the operation holes of the two switches through external mechanical interlocking. , in the case of failure of the external mechanical interlock, both switches can be operated at this time, if human error at this time, the load switch and the grounding switch are closed at the same time, a short circuit accident will occur, endangering the safety of equipment and personnel, and affecting the power supply
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[0014] The present invention will be further described below in conjunction with accompanying drawing.
[0015] Such as figure 1 As shown, the conductive contact rod assembly 1 is vertically arranged on the switch cabinet body. There is a piston 13 at the upper end of the conductive contact rod assembly 1. When the conductive contact rod assembly 1 moves upward, the piston 13 and the upper contact assembly 2 The upper plum blossom contact 11 contacts; the upper plum blossom contact 11 is the conductive contact body of the upper contact assembly 2, and there is a lower plum blossom contact 12 at the lower end of the conductive moving contact rod assembly 1, and the lower plum blossom contact 12 is connected with the lower plum blossom contact through a conductive material. The busbar 5 is connected, that is, the lower busbar 5 and the conductive contact rod assembly 1 are in the connected state; the lower busbar 5 is fixed on the switch cabinet through the insulating bracket B1...
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The invention discloses a loop self-locking load switch, which comprises a conductive movable contact rod component, an upper contact component, a switch movable contact, a grounding fixed contact, an upper bus, a lower bus and a crank arm, wherein the upper contact component is positioned just above the upper end face of the conductive movable contact rod component; the conductive movable contact rod component is in contact with the upper contact component when moving upwards; the upper contact component is connected with the upper bus; the lower end face of the conductive movable contact rod component is connected with the switch movable contact; when the conductive movable contact rod component moves downwards, the switch movable contact is in contact with the grounding fixed contact; the switch movable contact is in hinged connection with the crank arm for driving the conductive movable contact rod component to move; the lower bus is movably connected with the conductive movable contact rod component; and a grounding knife capable of rotating around an end point is also arranged on one side of the grounding fixed contact and is in contact with the grounding fixed contact during rotation. According to the loop self-locking load switch, main loops of a grounding switch and the load switch are interlocked; and even if external mechanical interlock fails, simultaneous closing of the grounding switch and the load switch can still be avoided.
Description
technical field [0001] The invention relates to a switchgear for medium-voltage power transmission and distribution, in particular to a circuit self-locking load switch. Background technique [0002] In the existing split type load switch, the load switch and the grounding switch are independent of each other and can be operated independently through their respective mechanisms. In order to meet the requirements of the electrical load and grounding that cannot be closed at the same time, it is realized by blocking the operation holes of the two switches through external mechanical interlocking , in the case of failure of the external mechanical interlock, both switches can be operated at this time, if human error at this time, the load switch and the grounding switch are closed at the same time, a short circuit accident will occur, endangering the safety of equipment and personnel, and affecting the power supply . Contents of the invention [0003] Aiming at the deficienc...
Claims
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IPC IPC(8): H01H31/10
Inventor 何光元曾俊峰贺凯
Owner 中黔电气集团股份有限公司