JPH0785609B2 - Gas insulated switchgear manufacturing method - Google Patents

Description

The present invention relates to a method for manufacturing a gas insulated switchgear.

FIG. 1 is a cross-sectional view showing an example of a disconnector provided in a gas-filled hermetically sealed container as a conventionally used device of this type, which is input into a container 2 filled with an insulating gas 1 through insulating spacers 3 and 4. The side three-phase conductor 5 and the output side three-phase conductor 6 are introduced, and sliding contact portions 5a and 6a are provided at the end portions of each conductor.

On the other hand, the movable contactor 9a is attached to the insulating operation rod 9 driven by the drive shaft 7 via the operation lever 8, and the movable contactor is driven up and down to slide in the contact portion 5a of the input side three-phase conductor. Then, the circuit is opened and closed by contacting and separating from the contact portion 6a of the output side three-phase conductor. The figure shows the case where the disconnector is in the closed state.

Further, a grounding switch is provided at the bottom of the container 2, and a movable contactor for grounding is driven up and down by a drive shaft 10 via a lever 11.
When the movable contactor 9a of the disconnector is driven upward and is in the disconnecting state, the movable contactor 12 for grounding is driven upward to engage with the contact portion 6a of the output side three-phase conductor, and the output side is provided. The three-phase conductor 6 is grounded through the movable contact 12, the connecting line 13, and the grounding conductor 14.

As described above, conventionally, the moth-insulated switchgear is manufactured by assembling the parts of the disconnecting switch and the earthing switch in the container 2 and sealing the upper and lower sides of the container 2. For this reason, many serial operations are required for manufacturing and it takes a long manufacturing period.

The present invention has been made in order to solve the drawbacks of this kind, and the details thereof will be described below.

FIG. 2 is a cross-sectional view of an embodiment of the present invention, FIG. 3 is a view taken in the direction of arrow A, and like FIG. 1, an insulating spacer (not shown).
The pedestal 15a is provided in the main container 15 into which the input side three-phase conductor 5 and the output side three-phase conductor 6 are introduced via the like, and the auxiliary container 16 in which the operating mechanism of the disconnecting switch and the grounding switch is stored is attached to this. ,
Fill with insulating gas.

That is, the drive shaft 17 of the disconnector is introduced into the auxiliary container 16 via the boss 16a attached to the side wall of the auxiliary container 16, and the movable contactor is driven from the drive lever 18 and the three-phase coupling hardware 19 via the insulating operation rod 20. Drive 21 up and down. Reference numeral 22 is a guide rod provided as a guide for causing the three-phase coupling hardware 19 to perform a linear movement.

Further, the auxiliary container 16 has an O-ring 23 provided on the coupling flange surface.
An airtight container common to the main container 15 is formed by a sealing means such as the above, and the inside is filled with the insulating gas 1, and the auxiliary container 16 is provided with a rotary airtight device inside the boss 16a for introducing the drive shaft. Make sure there is no risk of leakage.

On the other hand, an intermediate conductor 25 fixed to the mounting plate 16b of the auxiliary container via an insulator 24 is provided on the main container 15 side, and one end of the intermediate conductor 25 is provided with a contactor 26 to provide a contact portion that can be freely attached to and detached from the output-side three-phase conductor 6. And a sliding contact 27 is provided at the other end. The movable contact 21 is engaged with the sliding contact 27, and when it is slid downward, it engages with the fixed contact 28 provided on the input-side three-phase conductor 5, and the disconnector is closed. .

On the other hand, the drive shaft 29 of the grounding switch is airtightly introduced into the auxiliary container 16 via the boss 16c, which has the same airtight structure as the boss 16a and is attached to the other side wall of the auxiliary container 16, and the drive lever 30 The three-phase connecting plate 31 drives the movable contactor 32 for ground up and down. Here, a tubular portion 32a is formed on the upper portion of the movable contact 32 as shown by a broken line, and a conductor 34 whose upper end is fixed to the auxiliary container 16 via an insulating spacer 33 is provided inside the tubular portion 32a. Further, the tubular portion 32a is driven up and down while always keeping contact with the conductor 34 and sliding by means such as a slit (not shown) provided in the vertical direction to provide elasticity.

The conductor 34 has its tip grounded through a connecting wire 35 outside the auxiliary container. Therefore, when the movable contactor 21 of the disconnector is pulled upward and is in the disconnected state, the movable contactor 32 for grounding is used.
Is driven downward to engage the fixed contact 36 provided on the intermediate conductor 25, the output side three-phase conductor 6 is grounded.

If necessary, remove the grounding connection line 35,
It is possible to check the engagement state with the fixed-side contact 36 by setting the conductor 34 in the non-grounded state. Further, the grounding switch is a guide 37 for holding and driving the movable contact 32 and a three-phase package so that the main circuit resistance and the switching characteristics of the circuit breaker and disconnector can be measured. It is desirable that the three-phase connecting plate 31 for driving is made of an insulating material and is insulated for each phase. Furthermore, the movable contact 32 for grounding and the conductor 34
In order to make a sliding contact with the above, the louver contact or the other force type contactor using a garter spring can be used in addition to the above-described self-forced type contactor structure.

In the above embodiment, the case of the three-phase batch operation type has been described, but the present invention is not limited to this, and the same effect can be obtained by applying to the case of the phase separation type.

Further, any of an all-in-one type gas-insulated switchgear that collectively stores a circuit breaker, a disconnector, a grounding device, a busbar, and other components in the main container, and a general gas-insulated switchgear in which the container is divided for each component The present invention can also be applied to this.

According to the present invention, the parts of the disconnecting switch and the earthing switch are assembled in a place different from the main container in one auxiliary container, and the parts are airtightly attached to the pedestal of the main container. A disconnecting switch and a grounding switch are automatically configured between the conductor. Therefore, there is a remarkable effect that the manufacturing period of the regas-insulated switchgear can be shortened, in which the main assembly of the gas-insulated switchgear and the assembly of the disconnector and the ground switch are separate parallel work.

[Brief description of drawings]

FIG. 1 is a sectional view showing the structure of a conventional device of this kind, and FIGS. 2 and 3 are a sectional view and an arrow A view showing an embodiment of the present invention. 1 ... Insulating gas, 5 ... Input 3-phase conductor, 6 ... Output 3-phase conductor, 15 ... Main container, 16 ... Auxiliary container, 21 ... Movable contactor for disconnecting switch, 32 ... Grounding Movable contact.

Claims (1)

[Claims] 1. A main container and an auxiliary container which are connected to each other to form a common airtight container and are filled with an insulating gas, an input-side conductor and an output-side conductor which are airtightly introduced into the main container, and a disconnection path. Drive contactor and a disconnector drive mechanism for driving the contactor to open and close between the input side conductor and the output side conductor; a grounding movable contactor and the input side conductor for driving the contactor. A drive mechanism for a grounding switch that grounds either one of the output side is housed in the auxiliary container in a place different from the main container, and the auxiliary container is gas-tightly fixed to the pedestal of the main container. A method of manufacturing a gas-insulated switchgear, characterized in that a switchgear and a ground switch are formed in the switchgear body.