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Opening/closing device of an electric switchgear

A switchgear and switchgear technology, applied in electrical switches, grounding switches, high-voltage/high-current switches, etc., can solve the problems of loss of operating force, increase of operating force, poor operating efficiency, etc., so as to improve reliability and improve transmission efficiency. Effect

Inactive Publication Date: 2015-04-15
HITACHI IND EQUIP SYST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This increase in operating force is an obstacle to miniaturization of the switchgear
[0007] In addition, since the above-mentioned existing switchgear uses a rotating joint composed of a plurality of connecting rods, pins, etc., due to the deflection, looseness, etc. of these parts, the loss of operating force occurs, and there is a defect of poor operating efficiency.

Method used

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  • Opening/closing device of an electric switchgear
  • Opening/closing device of an electric switchgear
  • Opening/closing device of an electric switchgear

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0038] Hereinafter, one embodiment of the switchgear of the switchgear of the present invention will be described with reference to the accompanying drawings.

[0039] figure 1 is a side view showing one embodiment of the switchgear of the switchgear of the present invention, figure 2 Yes figure 1 top view. figure 1 Indicates the condition when the switchgear is in the open state.

[0040] The vacuum enclosure 1 is connected to a power source or a load (not shown) via a fixed-side feeder 2A and a movable-side feeder 2B. The movable contact 5 in the vacuum housing opposite to the fixed contact 3 stops at the following three positions: the closed position Y1 for energization, the open position Y2 for cutting off the current, and the maintenance for the surge voltage such as lightning. Safe disconnection position Y3 for workers.

[0041] The vacuum container 4 is composed of a ceramic cylinder 6 , upper and lower end plates 7 and 8 , and a bellows 9 , and the movable contac...

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PUM

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Abstract

In the switchgear opening / closing device, a movable contact 5 can be switched to the first position Y1, the second position Y2 and the third position Y3 with respect to a fixed contact. The device comprises an operation lever 80 interlocked with the movable contact 5, a shaft 31 to which the base of the operation laver 80 is fixed, a first operation mechanism 40, coupled with the shaft 31, to switch-operate the movable contact 5 to the first position, the second position and the third position, and a second operation mechanism 70 to selectively switch between prevention of movement and movement of the movable contact 5 from the second position to the third position by the first operation mechanism 40.

Description

technical field [0001] The present invention relates to a switchgear for a switchgear that moves a movable contact to three positions: a closed position, an open position, and an open position. Background technique [0002] In the power distribution equipment, there is a vacuum switch for disconnecting the load current or accident current; during the maintenance and repair of the load, the circuit breaker and grounding switch are used to ensure the safety of the operator, and the system voltage / current detection devices, and enclosed switchboards (also known as switchgear) such as protective relays. [0003] There are various insulation methods for this switchgear. In addition to the conventional air-insulated discs and box-shaped GIS using SF6 gas, recently, solid insulation, compressed air insulation, and complete vacuum insulation have appeared from the viewpoint of environmental protection. In addition, the miniaturization of various components such as disconnectors, ci...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01H33/42
CPCH01H33/6662H01H31/003H01H33/666H01H2033/6667
Inventor 森田步土屋贤治小林将人
Owner HITACHI IND EQUIP SYST CO LTD