JPH063963B2 - Kyu vehicle type gas insulated switchgear - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cubicle type gas-insulated switchgear, and in particular, a vacuum valve is arranged in the gas and an operating device is arranged in the outside air, but both are connected. Concerning the law.

[Background of the Invention]

Recently, for the purpose of downsizing power distribution boards, strengthening environmental resistance, and saving labor for maintenance, etc., vacuum valves and disconnectors of vacuum circuit breakers have been placed inside an insulating gas-tight container to keep them out of the air. It has been adopted that these operation devices are arranged and the outer shape is cubical. In these opening / closing devices, as a method of connecting the moving part of the vacuum valve and the operating device, a contact spring and a connecting lever for applying a contact force to the contact point of the vacuum valve in a gas-tight container are generally used as in JP-A-59-33720. Rods and the like are arranged for each phase, and these are connected to a three-phase integrated lever and drawn out of the container via a gas seal. This type has the advantage that the structure is simple, but the adjustment and confirmation of the compression dimension of the contact spring after the contact of the vacuum valve must be performed in a narrow container, and the container is sealed. Since it cannot be visually inspected, it is not possible to inspect the change in the contact spring compression dimension due to contact wear after the actual operation. Therefore, the maintenance inspection method must be considered separately.

[Object of the Invention]

An object of the present invention is to provide a gas-insulated switchgear capable of adjusting the compression length of the contact spring and checking the change in the compression length of the contact spring due to contact wear even after the gas container is sealed.

[Outline of Invention]

The gist of the present invention is to draw out the connecting member of the movable part by dividing it for each phase from the gas sealed container with the built-in vacuum valve, and arrange the contact spring and the adjusting part of the compression length in the operating device in the atmosphere, It is possible to make adjustments and inspections even after the gas container is sealed.

Example of Invention

An embodiment of the present invention will be described below with reference to FIGS.

This device is generally configured in a row board, and the basic configuration of one board surface is as follows: the shut-off chamber 1 in which the vacuum valve is placed in the gas sealed container, and the disconnector and busbar placed in the gas sealed container in the upper surface. A cable chamber 3 in the air through which a cable for supporting the disconnecting chamber 2 and the shut-off chamber 1 and connecting to the outside passes.
And an in-air operating chamber 4 which is disposed in front of the shut-off chamber 1 and has an operating device for a circuit breaker and a disconnector, and an in-air controlling chamber 5 which electrically controls the device. As a method of arranging the vacuum valve 6 in the shutoff chamber 1, when viewed from the operator chamber 4 side,
Although there are methods of arranging in a horizontal row, a vertical row, and a triangle, etc., in the present invention, a method of arranging the triangle in which the ratio of the width and the depth dimension of the entire apparatus can be changed in a well-balanced manner will be described in detail below.

A cable head 8 for mounting the cable 7 is arranged on the lower surface of the shutoff chamber 1, and a fixed-side conductor 9 of the vacuum valve 6 is mounted thereon. The fixed-side electrode 10 is provided on the upper end of the fixed-side conductor 9.
Is attached to and comes in contact with the movable-side electrode 12 attached to the lower end of the movable-side conductor 11 so that the movable-side electrode 12 can be contacted and separated. The movable side conductor 11 is electrically connected to the current collecting conductor 14 via the current collector 13 at the upper part. The current collecting conductor 14 is attached to a conducting conductor 16 fixed to an insulating spacer 15 attached to the lower end surface of the disconnecting chamber 2. On the disconnecting chamber 2 side, a disconnector is attached to the upper part of the current-carrying conductor 16, but it is not shown because it is not related to the present invention.

On the other hand, the upper end of the movable conductor 11 is connected to one end of a link 17 by a pin 18, and the other end of the link 17 is connected by a pin 21 to one end of a lever 20 rotatably attached to the current collecting conductor 14 by a pin 19. Be connected. The above is usually one shape for each phase, but the following may differ depending on the phase. The other end of the lever 20 is connected to one end of an insulating operation rod 22 or 23 by a pin 24 or 25. Insulated operating rod 22,
The other end of 23 is rotatably attached to one end of operating levers 28, 29, 30 which are attached to the sealed container 26 of the shutoff chamber 1 with the sealing packing 27 attached, respectively, and the pin 3
Connected with 1 or 32. The operating levers 28 and 29 are arranged at the concentric positions, and one of the portions where the two members are engaged is a shaft and the other is a hole that is rotatably fitted. The purpose of this is to reduce the deflection between the operating levers 28 and 29 when the operating levers 28 and 29 and the sealed container 26 are subjected to a force by putting the operating levers 28 and 29 from the cantilevered state to the both-supported state by fitting them together. is there. Therefore, the fitting dimensions of the shaft and the hole are such that the extension is reduced and the length is set to an appropriate length so that the above effect can be obtained. The operating lever 30 has only one phase, and both ends are sealed containers 26.
And support both sides. The operation levers 28, 29, 30 configured as described above are independent of each other in the sealed container 26.
Two are drawn out to one side and one is drawn out to the other side into the atmosphere outside of, and are connected to one end of the hinge pieces 33 or 34 by a pin 35, respectively. The other end of each of the hinge pieces 33, 34 is provided with a threaded hole, and the adjusting rod 3 is provided with threaded portions at both ends.
One end of 6 is screwed in and fixed with a nut 37 after all adjustments are completed. The other end of the adjusting rod 36 is inserted into a hole of a pin 39 attached to a main lever 38 arranged in the operator chamber 4, and a rear contact spring 40 is inserted into the washer 41 and a nut 42.
Can be held down with. The adjusting rod 36 is provided with stepped portions 36a and 36b for regulating the dimensions. The main lever 38 is connected to the operating device 43 of the circuit breaker. The sealed container 26 is provided with a lid 44 for work and inspection, and the entire container has a sealed structure, and an insulating gas such as SF ₆ is sealed therein. Reference numeral 45 denotes a support frame that supports the shutoff chamber 1 and secures a space for disposing the cable 7.

Next, the operation will be described. When the throwing force is transmitted by the operating device 43 in the open state of FIG. 1, each member moves in the direction of the arrow in the figure, and the vacuum valve 6 is fixed and the movable electrodes 10 and 12 are moved.
Come into contact with. Thereafter, when the main lever 38 further rotates in the clockwise direction, there is a gap G shown in FIG. 2 between the stepped portion 36a of the adjusting rod 36 and the pin 39, and the force of the contact spring 40 is fixed and applied to the movable electrode to close it. When completed, the circuit is closed as shown in FIG.

In addition, when the breaking force is transmitted from the operating device 43 in FIG. 2, the main lever 38 rotates counterclockwise to cut off the pin 3 in FIG.
9 contacts the stepped portion 36a of the adjusting rod, kills the force of the contact spring 40, and drives each member in the direction opposite to the arrow in FIG. 1 to complete the interruption as shown in FIG. The gap G shown in FIG. 2 is the hinge piece 3 in the completely assembled state.
Adjustment is made by adjusting the screw-in lengths of 3, 34 and the adjusting rod 36.

With the above configuration, even after the container 26 is sealed, the force of the contact spring 40 is ensured in the operation chamber 4 arranged in the front atmosphere, that is, the gap G shown in FIG. 2 is adjusted and visually inspected. Since it can be done for each phase, reconfirmation after product completion and inspection during actual operation can be performed, reliability can be improved and maintenance can be simplified. Since the operating levers 28 and 29 are arranged concentrically, the space in the depth direction may be for two phases even though the three phases are independently drawn out, and the axes of the two are fitted together. , Both ends are supported and stable.

On the other hand, an operating force is applied to the lower surface of the disconnecting chamber 2 via the lever 20, the current collecting conductor 14, and the insulating spacer 15, but the insulating operating rods 22 and 23 move in opposite directions between the phases on both sides and the central phase. The direction in which the force is applied is substantially opposite to that in the two phases out of the three phases, and the bending force applied to the disconnecting chamber 2 is small, which is advantageous. The main lever 38 receives a rotational moment for one phase at one end and a rotational moment for two phases at the other end, so that the flexures due to the torsions are substantially equal to each other.
It is better to arrange the operation unit 43 closer to the side where the two phases are concentrated.

〔The invention's effect〕

According to the present invention, the contact spring force between the contacts of the vacuum valve can be adjusted in the atmosphere on the front side and can be visually inspected, so that the compressed state of the contact spring can be easily checked after the completion of the entire assembly or at the time of maintenance and inspection. If the play size of the pin of the link or lever does not change, the change of the contact spring length when the circuit is closed is almost the same as the wear size of the movable electrode, so it is possible to judge whether the vacuum valve can be replaced. It is possible to save labor for maintenance and inspection and improve reliability.

[Brief description of drawings]

1 is a side sectional view of the gas-insulated switchgear of the present invention in an open circuit state, FIG. 2 is a side sectional view of a gas-insulated switchgear of the present invention in a closed circuit state, and FIG. 3 is a view taken along line AA of FIG. It is a figure. 1 ... Shutoff chamber, 6 ... Vacuum valve, 15 ... Insulating spacer,
22, 23 ... Insulated operating rod, 26 ... Sealed container, 28,
29, 30 ... Operation lever, 36 ... Adjustment rod, 40 ... Contact spring.

Claims (3)

[Claims] 1. A shut-off chamber that seals insulating gas, a plurality of built-in vacuum valves, a fixed and movable electrode of the vacuum valve, a link for driving the movable electrode, a lever, an insulating operation rod, and a gas. In a cubicle type gas insulated switchgear having an operation device of a circuit breaker arranged inside, an operation lever for independently communicating each phase between the inside of the breaker chamber and the outside air is provided, and the operation arranged in the air A contact spring that secures the contact force between the electrodes of the vacuum valve and a spring force adjusting means are provided inside the chamber independently for each phase, and the contact spring length can be adjusted and visually inspected even after the gas is sealed in the shutoff chamber. A cubicle type gas insulated switchgear characterized by. 2. The operation levers which can communicate with each other independently of each other, are arranged such that two phases out of three phases are arranged at the concentric position, and two phases are provided outside one side of the shutoff chamber and the other side. The cubicle type gas insulated switchgear according to claim 1, wherein one cubic phase is drawn out. 3. The operation levers for two phases arranged at the concentric position are characterized in that one end is a shaft and the other end is a hole shape, and the two levers are rotatably fitted together in the shutoff chamber. A cubicle type gas-insulated switchgear according to claim 1.