SU597038A1 - Unitized distributing device cabinet - Google Patents

Description

The invention relates to the design of cabinets of high-voltage switchgears, which are intended to receive and distribute electrical energy of three-phase alternating current and contain the cabinet frame itself, compartments of modular and linear WID1, high-voltage switch compartment equipped with insulating bushings and high-voltage contacts disconnectors.

Known cabinets KRU, in which the laying of the primary circuits, in particular cable inputs (conclusions), performed in the rear of the cabinet. in the lower part 1, 2, 3J, 4. These are the so-called complete switchgears of two-sided service, since in them the cutting and pouring of cable funnels, connecting cables to the linear buses and other works are performed from the rear the cabinet walls and, therefore, in such cabinets access to the rear wall is easy, this is a disadvantage, since it increases the construction part of the electrical substations.

Known cabinets KRU and one-way service, in which access to the linear bus, cable funnels and other components of the devices is possible from the compartment of the switch 5.

The disadvantages of these switchgear cabinets include the fact that their cable glands are located deep in the cabinet near its rear wall, so cutting them is inconvenient and difficult, and this complicates the installation of cabinets on electrical substations.

The aim of the invention is to improve the layout of cabinets and reduce their dimensions, as well as improve access to cable funnels in cabinets with one-sided maintenance, which greatly simplifies their installation and operation.

This is achieved due to the fact that in the switchgear cabinet contains compartments for busbars and line buses, the compartment of the high-voltage switch containing the insulating bushings, the high-voltage contacts disconnect the 1st and the current transformer, the terminals of which are connected to the linear busbars and the contacts of the high-voltage disconnector , the insulating sleeve and the current transformer are housed in a housing molded of insulating material, mounted on an antimagnetic bracket, mounted on enclosure cabinet.

FIG. 1 shows a closet switchgear cabinet with a side panel; in fig. 2 is a section along A-A in FIG. one; in fig. 3 - prefabricated welding case. Switchgear box; in fig. 4 - a separate unit of the switchgear cabinet (pass-through insulating bushes of the upper and thermal connectors of the high-voltage disconnector with a current transformer and a single plug connector) in the section.

The switchgear cabinet is a metal structure consisting of interconnected separate compartments with built-in high-voltage electrical devices, measuring devices, protection, control and auxiliary devices.

The switchgear cabinet is designed predominantly for {) its service side with a single or two double floor arrangement of similar Cabinets in the building part of the substation.

The cabinet consists of the actual housing 1, the compartments of prefabricated ПН1Н 2 and linear busbars 3, the compartment of the high-voltage switch 4 and the relay compartment 5.

The body 1 of the cabinet is collapsible-welded, i.e., of individual welded elements determining the rigidity of the whole structure, from the bottom of cabinet 6, front 7 and top 8 bearing pins, which are connected to each other and to other elements of the cabinet design by bolted joints .

In the cabinet described, the side walls 9 of the busbar busbar 2 and the sidewalls 10 of the busbar compartment 3 are punctured in the form of removable 1 sol giglitz, through which the corresponding busbars (busbar or linear) are inserted. At the same time, the taps 11 from busbars are installed vertically and parallel to the back wall 12 of the nagaf, and for electrical communication with stationary contact 13 of the lower n.1 plug connector 14 they are equipped with taller limb 15. In connection with the long length of the desolder 11 from busbar tires are fixed at two points on the support of the tori 16 and 17.

In order to provide increased lacrolization capacity, busbar compartments 2 and linear busbars 3 are separated by rigid metal partitions 18, and for providing one-sided installation service, and busbar tires 3, cable gigh assemblies (linear busbars) are close to the switch compartment 4 and are separated from it by metal partitions 19, mounted on the side racks 20 of the cabinet.

Each fixed contact 21 of the upper plug-in connector 22 of the high-voltage disconnector is fixed in the bushing 23. The fixed contact 2 simultaneously serves as one of the terminals of the nervous winding 24 of the transformer, current. The second terminal 25 of the primary winding is located above the transformer and is connected to it by a tap-off line bus line 3. The insulating bushing 23 and the current transformer are placed in a single cast of insulating material of the housing 27. Secondary

The winding 28 of the current transformer is embedded inside the housing 27. For connecting low-voltage measuring instruments, it is equipped with terminals 29. The primary winding 24 is isolated from the secondary winding 28 by an insulating layer and epoxy resin. The housing 27 is mounted on a nonmagnetic silumin bracket 30, which is mounted on the cabinet body. Moreover, in each cabinet three such insulating housings can be installed (according to the number of phases), and each of them is mounted on a separate antimagnetic bracket, all three of which are mounted on a common casting Kpoii bracket of the 31 single insulating sleeves of the 32 lower plugs. Mov high-voltage disconnectors.

Between the switch compartment and the busbar compartment, there is a small space in which there are cables 33 with cable funnels 34 and current transformers 35. Moreover, the cables are threaded between the insulating bushings 32 and 23 of the lower and upper plug connectors. Thus, the cable funnels 34 are located above the insulating sleeves 23, and the current transformers 35 are installed on the cable 33 freely, are filled with floating devices (i.e., freely mixed) and are located at the bottom 6 of the cabinet.

The compartment of switch 4 jaaf is the most large in volume. Compartment. The switch 4 or the cart with the equipment is mixed inside the compartment on the rollers 36 along guide rails 37. Moreover, the latter can be equipped with additional remote rails for pulling the switch out of the compartment to the outside. The switch compartment is closed by a door 38.

After the breaker 4 has been rolled out, the grommet 23 and 32, which has passed through, is closed by the shutters 39 in order to avoid the service personnel being under stress. With the removal of the partition 19, it becomes possible to have a good access to the linear compartment and to the cable hoppers. In this position, it is convenient to cut the cable, fill the cable funnels and connect the cable leads to the linear busbars 3.

Depending on the width and depth of the cable compartment, the number of cable leads may be four or more.

Claims (4)

Invention Formula A switchboard cabinet containing compartments of modular and linear busbars, a compartment, a high-voltage switch containing insulating bushings, contacts of high-voltage disconnectors and a current transformer, the terminals of which are connected to linear buses and contacts of the high-voltage disconnector, are different because in order to simplify the assembly and reduce the dimensions, the pro- fer hub sleeve and the current transformer are placed in a housing molded of insulating material mounted on an anti-magnetic bracket, zak replenished on the cabinet body. Sources of information taken into account in the examination: 1. USSR author's certificate number 84186, cl. 21 in 13/00, 1949. 2.Patent of France N ° 1405925, cl. H 02 B, 1965. 3. The patent of France M 2039924, cl. H 02 V. 1971. 4. Patent OpainuiH L 2060623, km. H 02 V, Yuu i,.,,. L D. srmilov A. l. Fundamentals of electrical engineering of industrial enterprises. . “Energy, from 164-175. rice 7-45, 1969.