RU166811U1 - CABINET OF COMPLETE DISTRIBUTION DEVICE - Google Patents

Abstract

1. A cabinet of a complete switchgear, comprising a disconnector in the high-voltage compartment, located in a solid insulation casing, characterized in that in the housing of solid insulation of each phase there are also a vacuum chamber with contacts and traction, traction to the disconnector, soldering of busbars that are partially filled a mixture of a liquid dielectric and solids of a dielectric material with a specific gravity less than the specific gravity of a liquid dielectric. 2. A cabinet of a complete switchgear according to claim 1, characterized in that the solids of the dielectric material have a spherical shape. 3. A cabinet of a complete switchgear according to claim 1, characterized in that liquid silicone is used as a liquid dielectric. 4. The enclosure of the complete switchgear according to claim 1, characterized in that the contacts of the busbars of the busbars are also connected to the fixed contact of the ground electrode, and the body of the ground electrode made of solid insulation is attached to the switching housing. 5. The cabinet of the complete switchgear according to claim 1, characterized in that the busbars are located in the upper part of the cabinet. 6. The enclosure of the complete switchgear according to claim 1, characterized in that a safety valve is built into the switching housing of solid insulation. 7. The enclosure of the complete switchgear according to claim 1, characterized in that an insulating rod-witness of the contact position of the disconnector is additionally attached to the disconnector contact.

Description

The utility model relates to the field of electrical engineering, namely to complete switchgear in which electrical devices and conductive elements are coated with solid insulation (Solid Insulated Switchgear technology).

Known cabinet complete switchgear containing busbars, a housing of solid insulation, which houses the electrical switching devices and contacts of the solder busbars (RU 142071 U1, application 2013144125/07 from 01.10.2013, published 06/20/2014).

The cabinet described above cannot be pulled out of a row since there is no approach to busbars, which means it is impossible to dismantle them. It is not possible to integrate busbar grounding in the input cabinets, lines, voltage transformer, sectional switch, sectional disconnector, auxiliary needs. An additional cabinet is required to ground busbars. The enclosure made of solid insulation of the cabinet has increased dimensions, since the insulating medium in it is air.

Known cabinet complete switchgear containing in the housing of solid insulation disconnector contacts, which are placed in a liquid dielectric medium (RU 141475 U1, application 2013144132/07 from 01.10.2013, published 10.06.2014).

This cabinet protects only the contacts of the disconnector from oxidation of the contacts. When transporting the cabinet, foaming of the insulating liquid with the saturation of the liquid with air is possible, which will reduce the insulating properties of the insulating liquid. In addition, the location of the busbars at the bottom of the cabinet does not allow dismantling the busbars, and therefore, dismantling the cabinet from a row. In the case of solid insulation, there is no fuse against differential pressure.

The objective of the utility model is:

1) to provide access to the connection of busbars with taps for dismantling and withdrawing the cabinet from a number of the complete switchgear;

2) reducing the size of the switchgear, by expanding the functionality of the housing made of solid insulation.

3) increase the reliability of the liquid dielectric.

4) protect against differential pressure inside the housing from solid insulation.

5) reduce the number of cabinets.

Utility Model Essence

The enclosure of the complete switchgear contains in the high-voltage compartment of the housing made of solid insulation with a disconnector with contacts and traction located in them, a vacuum chamber with contacts and traction, and a soldering contact of the busbars, which are partially filled with a mixture of liquid dielectric and solids of dielectric material with specific gravity less than the specific gravity of a liquid dielectric. The busbars of the cabinet are located in the upper part of the cabinet with the possibility of dismantling them. A valve is built into the housing of solid insulation, which equalizes the air pressure inside the housing with the ambient pressure and also serves as a safety valve. An additional insulating rod is attached to the contact of the disconnector, a witness of the position of the contact of the disconnector.

New in the proposed utility model is that the busbars are sealed in the case of solid insulation, and the busbars themselves are located in the upper part of the cabinet above the case of solid insulation. Contacts of busbars with traction, a vacuum chamber with contacts and traction, an insulating rod-witness of the position of the disconnector contacts, are located in a mixture of a liquid dielectric and solids made of dielectric material. The contacts of the busbar seals can be connected to the fixed contacts of the earthing switch. A safety valve is integrated in the housing of solid insulation. Cases made of solid insulation of the ground electrode are attached to the casing of solid insulation.

The proposed cabinet switchgear is illustrated by drawings, in which:

in FIG. 1 shows a general view of the cabinet, in which the contacts of the earthing switch with traction, the soldering of busbars, the vacuum chamber with the contacts and traction, and the rod-witness of the disconnector contact position are filled with a mixture of liquid dielectric and solids in a case made of solid insulation.

in FIG. 2 shows a general view of the cabinet, in which the contacts of the earthing switch with traction, the soldering of the busbars, and the test rod of the contact position of the disconnector are filled with a mixture of liquid dielectric and solids in a case of solid insulation.

in FIG. 3 shows a general view of the cabinet of a voltage transformer with an earthing switch for busbars.

in FIG. 4 is a view A of a cabinet facade without doors and a relay cabinet.

Utility Model Description

The cabinet of the complete switchgear 1, is divided by partitions 2 into a high-voltage compartment 3 and a control compartment 4. In the high-voltage compartment 3 there is a housing 5, which is made of solid insulation. The switching devices are located in it: a disconnector with contacts 6 and a rod 7, a test rod of the contact position of the disconnector 8, a vacuum chamber 9 with movable contacts 10 and a switch rod 11, soldering 12 busbars with contacts 13. The switching devices are filled with a mixture of liquid dielectric and solid bodies of dielectric material 14. In the high-voltage compartment there is also an earthing switch of line 15, an earthing switch of busbars 16, a voltage transformer 17, a drive of a disconnector and an earthing switch of line 18 and a drive of an earthing switch of busbars 19. To the housing from solid insulation 5, a safety valve 20 is integrated.

The drive compartment of the switch 21, the control unit 22 and the busbars 23 are located in the control compartment.

In the “on” position in the introductory cabinet, power is supplied through the cable entry, closed contacts of the vacuum chamber of the circuit breaker 9, movable contacts 10, contacts 6 of the disconnector, contacts 13 of the solders 12 of the busbars 23. When a command is sent to turn off the power, the contacts of the vacuum chamber 9 and pins 6 of the disconnector. The grounding of the line is carried out using an earthing switch 15.

In the cabinet of the voltage transformer, the contacts of the disconnector 6 using the drive 18 are opened. The contacts of the earthing switch 16 of the busbars using the drive 19 are closed and ground the busbars 23.

Filling the body of solid insulation with a mixture of a liquid dielectric and solids of a dielectric material can significantly reduce the contact of the liquid dielectric with air, which means that air penetrates into the liquid dielectric, and also prevents splashing and foaming of the liquid dielectric during transportation, which preserves the insulating properties of the liquid dielectric .

Filling the contacts of the vacuum chamber, the contacts of the ground electrode, and the contacts of the busbar seals with a mixture of liquid dielectric and solids made of dielectric material can completely protect all cabinet contacts from contact with air, and therefore, from oxidation and also significantly improve heat removal from conductors and contacts, evenly distributing heat throughout the body of solid insulation. Filling with a mixture of liquid dielectric and solids all the contacts inside the housing made of solid insulation can significantly reduce the size of the housing made of solid insulation since surface leakage practically disappears.

Placing busbar seals with non-insulated contacts in a housing made of solid insulation in a mixture of liquid dielectric and solids made of dielectric material allowed:

1) place the busbars in the upper part of the cabinet, which allowed them to be dismantled and, as a result, dismantled the cabinet from a number of complete switchgears;

2) refuse a separate grounding cabinet for busbars, since it is possible to place an earthing switch in a cell of a voltage transformer;

The presence of a safety valve built into the housing made of solid insulation allows you to equalize the pressure inside the housing with the pressure of the external environment. Since the internal cavity of the housing is made of solid insulation and is hermetically isolated from the external environment, increased pressure may occur inside the temperature difference. Given the large surface of the cabinet, even with a small pressure drop, large forces could burst out of the cabinet, which could ultimately lead to destruction of the cabinet. In case of a sudden sharp increase in pressure due to an emergency, the valve is activated and relieves pressure. It is possible to use a valve of type VM-32, which allows air to pass through and does not allow water to pass through and is triggered by a sharp increase in pressure.

An insulating rod attached to the disconnector contact allows you to visually control the position of the disconnector contact.

Claims (7)

1. A cabinet of a complete switchgear, comprising a disconnector in the high-voltage compartment, located in a solid insulation casing, characterized in that in the housing of solid insulation of each phase there are also a vacuum chamber with contacts and traction, traction to the disconnector, soldering of busbars that are partially filled a mixture of a liquid dielectric and solids of a dielectric material with a specific gravity less than the specific gravity of a liquid dielectric. 2. The cabinet of the complete switchgear according to claim 1, characterized in that the solids of the dielectric material have a spherical shape. 3. The cabinet of the complete switchgear according to claim 1, characterized in that liquid silicone is used as the liquid dielectric. 4. The enclosure of the complete switchgear according to claim 1, characterized in that the contacts of the busbars of the busbars are also connected to the fixed contact of the ground electrode, and the ground electrode housing of solid insulation is attached to the switching housing. 5. The cabinet of the complete switchgear according to claim 1, characterized in that the busbars are located in the upper part of the cabinet. 6. The cabinet of the complete switchgear according to claim 1, characterized in that a safety valve is built into the switching housing of solid insulation. 7. The cabinet of the complete switchgear according to claim 1, characterized in that an insulating rod is additionally attached to the contact of the disconnector, which is a witness of the position of the contact of the disconnector.

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