JPH0140259Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a high-voltage cabinet type switchgear which has a large working space and a space for installing current transformers, etc., and particularly improves workability such as connecting and fixing cables.

For example, as a high-pressure cabinet type switchgear,
The one shown in Figure 1 has been proposed, and the two
two switches A and B, a pull-in cable 3 and a pull-down cable 4 connected to the switches A and B via direct-coupled stress cones 1 and 2, and a cable located above the switches A and B. It is installed in a branch line (customer line) branched from the main line via a molded busbar 7, consisting of mechanical parts 5 and 6 that control the opening and closing, switches A and B, a lead-in cable 3, and a pull-down cable 4. A branch cable 9 is connected to the disconnector C via a direct connection type stress cone 8, and these are housed in a cabinet 10.

In the case of the above-mentioned high-voltage cabinet type switchgear, since the branch line is provided with a circuit breaker (at the far end, not shown) of the branch line, it is necessary to open and close the disconnector C with the circuit breaker open. Therefore, it is possible to replace the conventionally used switch with the disconnector C which does not have a load switching function, thereby reducing costs and reducing the mechanical part 5,
6 on the upper part of the cabinet 10, the poor operability of the conventionally used portable opening/closing tool is improved. In this operation, switches A and B are operated based on the operation of mechanism parts 5 and 6.
The disconnector C can be opened in a no-load state by controlling the load opening/closing and opening the switch A or B. On the other hand, as mentioned above,
Since the load is cut off when the circuit breaker is open, the disconnector C can be opened.

However, according to this high-voltage cabinet-type switchgear, the mechanism parts 5 and 6 are provided at the top of the cabinet 10, which is always required to be compact, and there is a limit to how high the installation level of the switches A and B can be increased. Therefore, the work of connecting and fixing the lead-in cable 3 and the pull-down cable 4 (including straightening) must be done in the cabinet 10, which has limited space.
In addition, it is relatively difficult to secure a space to install a current transformer and a detection device for short-circuit current detection on the connected and fixed cable.

This invention was made in view of the above,
In order to increase the work space and space for installing current transformers, etc., and improve workability, especially for cable connections and fixing (straightening), the main line switch is configured with a gas switch and placed at the top inside the cabinet. The present invention provides a high-pressure cabinet-type opening/closing arrangement.

The high-pressure cabinet type switchgear according to the present invention will be explained in detail below.

Figures 2A and 2B show an embodiment of the present invention, and the same parts as in Figure 1 are indicated by the same reference numerals, so redundant explanation will be omitted. A two-circuit gas switch D (with a built-in mechanical part) is located at the upper part of the cabinet 10, and a pull-in cable 3 and a pull-down cable 4 are connected to the lower part thereof via direct-coupled stress cones 1 and 2. ing. Here, the gas switch D is connected to the disconnector C by a molded busbar 7. The mold busbar 7 consists of a horizontal part 7A and a vertical part 7B, and each phase of the horizontal part 7A is arranged in parallel on a plane parallel to the ceiling surface of the cabinet 10, and the vertical part 7B is arranged in a plane parallel to the front surface of the cabinet 10. They are parallel at the top. As is clear from the above configuration, since the gas switch D is placed in the upper part of the cabinet 10, the space for the main line cables 3 and 4 becomes large, and since the molded bus bar 7 is configured as described above, the branch line cable The space at 9 has become larger.

In the above configuration, the main line can be opened and closed by attaching and detaching the operating handle to the side of the gas switch D, and after opening the main line, the disconnector C can be opened without any load. .

Furthermore, the gas switch D may be automated if necessary, and the disconnector C may be replaced with a switch capable of switching the load.

As explained above, according to the high-voltage cabinet type switchgear of the present invention, the main line switch is composed of a gas switch and is disposed in the upper part of the cabinet, and the mold bus bar is composed of a parallel horizontal part and a parallel vertical part. It is possible to enlarge the working space and the space for installing a current transformer, etc., and improve the workability, especially when connecting and fixing cables (straightening).

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing the concept of the proposed high-pressure cabinet type switchgear. FIGS. 2A and 2B show an embodiment of the present invention, in which A is a front view and B is a side view. Explanation of symbols, 1, 2, 8... Direct connection type stress cone, 3, 4... Main line cable, 5, 6... Mechanism section, 7... Molded bus bar, 9... Branch line cable, 10... Cabinet, A, B...Air switch, C...Disconnector, D...Gas switch.

Claims (1)

[Claims for Utility Model Registration] A main line having a switch that can switch and close a load, and a branch line branched from the main line that has a disconnector that cannot switch and close a load, and the main line and the branch line are installed in a cabinet. In the housed high-pressure cabinet type switchgear, the switch is constituted by a gas switch disposed at the upper part of the cabinet, and the disconnector is disposed at the upper part of the cabinet, and the disconnector is disposed at the upper part of the cabinet, and a horizontal part connected to the gas switch by a molded busbar, and the molded busbars for each phase are drawn out from the gas switch in a parallel arrangement on a plane parallel to the ceiling surface of the cabinet; , and a vertical section that bends at a right angle from the horizontal section and is connected to the disconnector in a parallel arrangement on a plane parallel to the front surface of the cabinet.