RU197562U1 - SYSTEM OF ELECTROTECHNICAL TIRES AND FIXED CONTACTS WITH A UNIVERSAL HOLDER - Google Patents

Abstract

The utility model relates to the field of electrical engineering, namely, to the designs of holders of precast busbars and fixed contacts installed in control cabinets. The universal holder is designed for mounting rectangular busbars and fixed contacts of a rectangular shape with a protrusion of a L-shaped shape. The universal holder consists of threaded rods, nuts and washers, bushings of dielectric material, two insulators of dielectric material of a rectangular shape. On the insulators there are several through holes. On one surface of the insulators are several deep transverse grooves of rectangular cross section. On the opposite surface of the insulators opposite the grooves are placed rectangular cutouts. Shallow grooves of rectangular section are located on one side surface of the insulators between the grooves and cuts, and shallow rectangular cutouts are located on the other side surface of the insulators opposite the shallow grooves. The utility model makes it possible to create a universal holder suitable for mounting electrical busbars arranged horizontally and vertically, as well as for mounting fixed power contacts. 5 ill.

Description

This utility model relates to the field of electrical engineering, namely, to the designs of holders of precast busbars and fixed contacts installed in control cabinets.

In electrical engineering, electrical cabinets with a rated voltage of up to 1000 V often use electric current conductors in the form of rectangular busbars made of copper or aluminum. Such tires must be securely attached to the cabinet to prevent short circuits between the tires and between the tires and the cabinet. For mounting, various devices are used, including components made of insulating materials.

The prior art systems for such tires with busbar holders (English - busbar holder) of the ABB company (STRIEBEL & JOHN) models ZX 154, 155, 156, (installation instructions - https://search-ext.abb.com/library/Download. aspx? DocumentID = 2CPC0126222M5601 & LanguageCode = de & LanguageCode = en & DocumentPartId = l & Action = Launch), which are the prototype for the claimed utility model. Busbar holders include insulators made of high-strength dielectric resin reinforced with fiberglass, rectangular in shape with several rectangular grooves of different widths on opposite sides and through holes for connection. Between the pairs of such insulators there are buses of the quantity and size necessary depending on the current. Also, busbar holders include steel long bolts or threaded rods, with which pairs of insulators are tightened with nuts, fixing the tires together, and also attaching the entire system to the cabinet body. On the studs between the insulators, bushings are placed in the form of pipe segments of a dielectric material. These bushings are necessary to distance the insulators and protect the busbar from contact with steel studs.

The tire holders of the prototype are used only for mounting tires arranged horizontally and are not suitable for mounting vertically mounted tires. The reason is that it is not possible to compress the tires with insulators from the sides in such a way as to prevent the tires from moving downward under their own weight. Also, these busbar holders are not adapted for any additional function, for example, for fastening power fixed contacts. Fixed contacts are used in the same electrical cabinets to connect with movable contacts, for example, withdrawable modules of electrical cabinets or withdrawable circuit breakers, and also require reliable fastening with insulation from contact with the cabinet body.

The objective of the claimed utility model is the creation of a universal holder suitable for attaching busbars arranged horizontally and vertically, as well as for attaching fixed power contacts.

It is assumed that the holder can be used with rectangular busbars (1) of conductive material (for example, copper) and fixed contacts (14) of conductive material in the form of rectangular plates with an aperture (15) with L-shaped protrusions.

The technical result is achieved by performing a universal holder of the following elements:

Insulators (2), made of high-strength dielectric resin reinforced with fiberglass, rectangular with several through holes (3) for connection. On the surface (4) of the insulators there are several deep transverse grooves (5) of rectangular cross section over the entire width of the insulator. On the surface (6) of the insulators opposite the grooves (5) angular cuts (7) of a rectangular shape are placed. On one side surface of the insulator between the grooves (5) and the cutouts (7) are shallow grooves (9) of rectangular cross section. On the other side surface of the insulator there are shallow angular cutouts (8) of a rectangular shape adjacent to the surface (6);

Steel threaded rods (10), nuts (11) and washers (12);

Bushings (13) in the form of pipe segments made of dielectric material;

The utility model is assembled and operates as follows.

Tires (1) electrotechnical rectangular cross section of the required size in the right amount are inserted into the grooves (5) of the pairs of insulators (2) and clamped between them using threaded rods (10) and nuts (I) with washers (12). The bushings (13) serve to distance the insulators when they are pulled together by studs, as well as to protect the tires from contact with the studs. For fastening tires, several pairs of insulators distributed along the length of the tires are used. Studs (10) also attach the system to the cabinet body. In this way, reliable fastening of tires (1) along the entire length to the cabinet body and load distribution from the weight of tires (1) to insulators (2) is achieved.

With the vertical arrangement of the tires (1), in addition to the pairs of insulators (2) distributed along the length of the tires, a pair of the same insulators (2) is used, fastening the tires from below at their ends. To do this, the insulators (2) are turned to the surface of the tires (6) and the ends of the tires are placed in the cutouts (7). The lower insulators are also attached to the cabinet body. Thus, the lower ends of the tires (1) are fixed in the corner cutouts (7) of the insulators, which eliminates the movement of the tires (1) down under their own weight.

To fix the fixed contacts (14) to the cabinet body, the L-shaped protrusion of the contact (14) is placed between a pair of insulators (2) twisted together by the surfaces (6). The outer part of the contact is fixed from rotation due to placement in the grooves (9) and cutouts (8) on the side surfaces of the insulators. Holes (15) are used to connect the contact to the conductor (bus or wire). Due to such a reliable and precisely positioned fastening of the fixed contacts, they can be used for connections with movable contacts (16), for example, withdrawable modules or withdrawable switches.

The holders are fastened with threaded rods (10) into the openings of the components of the cabinet cabinet - frames, rails, traverses, etc.

As a result, we get a universal holder, consisting of a pair of insulators, bushings, threaded rods and nuts with washers, one model of which is enough to mount the tires and fixed contacts to the cabinet body.

This technical solution is illustrated by the following drawings:

in FIG. 1 shows a system of electrical tires with horizontal and vertical options and their holders - general views;

in FIG. 2 shows the fixed contacts fixed in the holder, as well as the connection diagram with the moving contacts - general views;

in FIG. 3 is a drawing of a mounting of vertically arranged tires — front view and sections;

in FIG. 4 shows a general view of a fixed contact, fixed contacts fixed in the holder - top view, section

in FIG. 5 is a drawing of an insulator - views from below, side, top, general view from above, general view from below.

In FIG. 1 in general views, tires (1) and their fastening horizontally and vertically are shown using universal holders, which include insulators (2).

In FIG. 2, in general views, fixed contacts (14) fixed in a universal holder and movable contacts (16) in a disconnected (upper image) and connected (lower image) view are shown.

In FIG. 3 shows drawings explaining the principle of using a universal holder. The sections show sections of insulators (2), their grooves and cutouts used for mounting tires from the sides and at the lower ends.

In FIG. 4 shows a drawing of a fixed contact (14) - General view. A drawing is also shown depicting several fixed contacts fixed in a holder, explaining the principle of securing fixed contacts with a universal holder. The sectional view of W-W shows the placement of the L-shaped protrusion of the fixed contact (14) in the cutouts (7) and (8) and the grooves (9) of the insulators (2). The hole (15) is used to electrically connect the fixed contact (14) to other conductors.

In FIG. 5 shows various types of insulators (2) for understanding the location of grooves, cutouts and holes on it. Holes (3) are used to connect insulators with threaded rods. The grooves (5) are used to mount the tires on the sides. Corner cutouts (7) are used for attaching the lower ends of the tires, as well as for attaching fixed contacts. Shallow grooves (9) and cutouts (8) on the side surfaces of the insulator (2) are used to position fixed contacts.

The utility model makes it possible to create a universal holder suitable for attaching electrical busbars arranged horizontally and vertically, as well as for attaching fixed power contacts.

Claims (1)

A universal holder for busbars of rectangular cross section and fixed contacts of a rectangular shape with a L-shaped protrusion, consisting of threaded rods (10), nuts (11) and washers (12), bushings (13) made of dielectric material, two insulators (2) of a rectangular dielectric material with several through holes (3), on one surface (4) of which several deep transverse grooves (5) of a rectangular section are placed, characterized in that angular cutouts are placed on the opposite surface (6) of the insulators opposite the grooves (5) (7) a rectangular shape, on one side surface of the insulators between the grooves (5) and the cut-outs (7) there are shallow grooves (9) of a rectangular section, on the other side surface of the insulators opposite the grooves (9) there are shallow angular cutouts (8) of a rectangular shape, adjacent to the surface (6).

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