JPH0347366Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a power cable lead-in type gas insulated switchgear, and particularly relates to a gas insulated switchgear in which the layout of the equipment constituting the device is improved.

[Technical background of the invention and its problems] Gas-insulated switchgear is a gas-insulated switchgear that is a gas-insulated switchgear in which the insulation and arc-extinguishing devices are placed in a container filled with SF ₆ gas, etc., which has excellent insulation and arc-extinguishing properties. It houses a section, a disconnector, and a combination of equipment such as a bus bar. This type of switchgear can be configured to be significantly smaller than an air-insulated switchgear. In recent years, due to the remarkable rise in land prices, gas-insulated switchgears, which can be made smaller, have been increasingly used in substations. Furthermore, by rationally arranging the components, further miniaturization is achieved, resulting in lower costs for gas-insulated switchgear and for substation construction, including buildings for indoor gas-insulated switchgear. can be measured.

By the way, FIG. 3 shows a single wire connection circuit showing an example of the configuration of a substation of a double bus type and power cable connection type. FIG. 4 shows a side view of an example of a conventional equipment configuration corresponding to the above circuit.

Figure 4 shows the patent application No. 58-56052 filed by the applicant.
This is an example of the layout of the equipment shown in the above issue, in which the outlet terminal parts 1 and 2 protrude in opposite directions from above and below the breaker tank, so that the overall configuration is approximately in a Z-type arrangement. The shear cutter 3 is placed vertically. The shear section of the shear disconnector 3 approaches and separates in the axial direction of the shear disconnector tank. Then, a disconnect switch 5 on the A bus 4 side and a disconnect switch 7 on the B bus 6 side, which have two terminal directions parallel to the shear disconnection direction of the sheath disconnector 3, are arranged in the terminal section 1 located at the lower part. . That is, these disconnectors 5 and 7 are of an integral construction with a bus bar, which is known per se. The circuit configuration connected to the terminal portion 2 located at the upper part of the breaker 3 has an L-shaped configuration as a whole. First, the alternator 9 is placed on the extension in the projecting direction of the outlet terminal portion 2, and the line-side disconnect switch 11 and the earthing switch 10 are provided at the corners of the L shape. A cable connection part 12 is arranged at the bottom of this disconnector 11 in parallel to the direction of connection and separation of the shear disconnection part of the shinobi disconnector 3, and the power cable 1 is connected to this cable connection part 12.
Connect 3. Note that 14 indicates a cable cone, and 15 indicates a foundation frame.

In the equipment arrangement of the above-mentioned configuration, first of all, a current transformer 9 is installed between the upper outlet part 2 of the shinobi disconnector 3 and the line-side disconnector 11 and the earthing switch 10 arranged at the corner of the L-shaped arrangement. However, since the current transformer 9 and its installation length l' shown in FIG. There is a limit to the reduction of the longitudinal dimension _l4 of the side surface. Next, the lower outlet terminal 1 of the breaker 3 is used as the second
Both main busbars, A busbar 4 and B busbar 6, are placed on the side,
A cable connection part 12 is arranged on the side of the upper outlet terminal 2 which is opposite to the lower outlet terminal 1, and the cable cone 14 inside the cable connection part 12 is connected to the fourth Since it is arranged at a height h as shown in the figure, there is a problem in that the sheath cutter 3 must be hoisted at a height of h ₄ when it is carried out and re-carried in for disassembly and inspection.

[Purpose of the invention] The present invention was made to solve the above-mentioned conventional problems, and it is possible to reduce the longitudinal dimension of the side of a gas-insulated switchgear, and to make it easier to carry out and reuse during disassembly and inspection of the insulation switchgear. The purpose of this invention is to reduce the lifting height of the disconnector during delivery and to obtain a gas insulated switchgear with good work efficiency during disassembly and inspection.

[Summary of the invention] According to the invention, which was made to achieve the above object, the cable cone inside the cable connection part is passed through the base frame of the gas-insulated switchgear so that the cable cone part is lower than the height of the base frame. In addition, the cable connection part is arranged at a certain angle to the direction in which the cable disconnector approaches and separates, thereby reducing the lifting height of the cable disconnector and making it easier to remove the cable during disassembly and inspection. The aim was to improve work efficiency.

[Embodiment of the invention] An embodiment of the invention will be described below with reference to FIG.

Fig. 1 is a side view of a gas insulated switchgear constructed from the single line circuit diagram of Fig. 3 according to the present invention; The busbar side equipment configuration of the disconnector 5 on the A busbar 4 side and the disconnector 7 and earthing switch 8 on the B busbar 6 side to be connected is the same equipment arrangement as shown in FIG. 4 described above. In the upper outlet terminal portion 2 of the shield breaker 3, the shield section in which the container of the current transformer 9 is housed in the shield breaker 3 is also arranged parallel to the contact/separation direction. Here, the current transformer 9 itself housed in the current transformer container may be arranged parallel to or perpendicular to the direction of approach and separation of the shingle section. Therefore, the container of the current transformer 9 is located at a corner of the line-side circuit component, which has an L-shaped configuration as a whole. At the bottom of the container of current transformer 9,
The track side disconnector 11 and the grounding device 10 are connected to the current transformer 9
The container is arranged so that the axis formed by the line-side disconnector 11 is parallel to the direction of approach and separation of the sheath section. A cable connecting portion 12 is arranged below the disconnector 11 in parallel to the direction of contact and separation of the sheath disconnection portion. This cable connection part 12 is designed such that the part in which the cable cone 14 connected to the internal power cable 13 is housed is located below the height of the base frame 15 of the gas-insulated switchgear, that is, in the cable room 16. will be placed in For this reason, there is a through hole 1 in the foundation frame 15.
A portion of the cable connection portion 12 is inserted into the through hole 15a.

FIG. 2 shows, in particular, the cable connection section 12 in the configuration of the equipment shown in FIG. This is another embodiment of a gas insulated switchgear in which the gas insulated switchgear is arranged at a predetermined angle θ.

According to the embodiment of the present invention as described above, the L as a whole connected to the upper outlet terminal portion 2 of the breaker
By reducing the length in the extending direction of the outlet terminal portion of the line breaker of the line-side circuit component, which constitutes Since the connecting part between the cable connection part 12 and the disconnector 11 can be lowered, the lifting height of the disconnector when carrying it out and re-carrying it during disassembly and inspection of the disconnector can be reduced to ₁ h. Overall, the cost of the gas insulated switchgear, the house housing it, and its attached equipment can be significantly reduced.

Furthermore, according to another embodiment shown in FIG. 2, the depth d of the cable room 16 from the installation surface of the gas-insulated switchgear
This makes it possible to simplify the foundation and reduce costs.

[Effects of the invention] As explained above, according to the invention, the side longitudinal dimensions of the equipment can be reduced, and the lifting height of the disconnector can be reduced, resulting in a significant reduction in the size of the building and its auxiliary equipment. It is possible to provide a gas insulated switchgear that can be cost-effectively reduced.

[Brief explanation of the drawing]

Figure 1 is a side view of a gas insulated switch according to one embodiment of the present invention, Figure 2 is a side view of a gas insulated switch showing another embodiment of the present invention, and Figure 3 is a double busbar for cable entry. A single line diagram of the system, FIG. 4 is a side view of a conventional gas insulated switchgear. 1, 2...Output terminal part of the breaker, 13...The breaker, 4,6...Main busbar, 5,7...Bus bar side disconnector, 8...Earthing switch, 9... ...Current transformer, 10...
...Railway side earthing switch, 11...Railway side disconnector, 1
2...Cable connection device, 13...Power cable, 14...Cable cone, 15...Foundation frame of gas insulated switchgear, 16...Cable room.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) Connect bus-side circuit components to the lower outlet terminal part of the vertical shield breaker whose upper and lower outlet parts have terminals arranged in a substantially Z-shape. In a gas-insulated switchgear in which track-side circuit components are connected to the upper outlet terminal, the height of the cable cone inside the cable connection section of the line-side circuit components is the same as that of the gas-insulated switchgear. It is arranged so as to be located in the cable room below the height of the foundation frame, and has an axis parallel to the direction in which the container connects and separates from the disconnector through the disconnector at the top of the cable connection. A gas insulated switchgear characterized in that it is connected to the upper outlet terminal of a shield breaker via a current transformer. (2) The utility model registration claim described in claim 1, in which the part in which the cable cone part is housed inside the cable connection part is arranged at a predetermined angle from the approach and separation direction of the sheath breakage part to the cable lead-in direction. Gas insulated switchgear.