RU2794132C1 - COMPLETE DISTRIBUTION DEVICE OF EXTERNAL INSTALLATION WITH A VOLTAGE OF 35 kV (CDDE) - Google Patents

Abstract

FIELD: electrical engineering.

SUBSTANCE: complete distribution device of external installation with a voltage of 35 kV (CDDE). The device of the transformer cell CDD (E) with a voltage of 35 kV consists of a transformer tank with low-voltage and high-voltage terminals, busbars with support insulators, a terminal cabinet, surge arresters, electrical circuit connectors, high-voltage fuses, fences and a service corridor. At the end of the high-voltage outlet, the first part of the connector is additionally provided and fixed, the second part of the connector is fixed with the lower clamp of the fuse on the bolted flange of the surge arrester outlet. The upper fuse clamp is fixed with the tip of the bolt clamp of the busbar loop on the support insulator. The transformer tank is fixed with the help of embedded releases on an additionally provided support platform. Under the platform, a chassis-frame with rollers for rolling out the transformer tank is additionally provided. A platform lifting mechanism is provided between the platform and the chassis-frame. In turn, the lifting mechanism is driven by a high-speed electric motor with a gearbox and a horizontal threaded shaft along the entire length, as well as two rods pivotally fixed both to each other and to the threaded shaft. The platform lift level determines whether the connector parts are turned off or on.

EFFECT: compact design of the voltage transformer cell for a complete distribution device of external installation with a voltage of 35 kV.

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Description

The invention relates to the field of electrical engineering, in particular a complete switchgear with a voltage of 35 kV outdoor and indoor installation - (KRUN).

KRU(N) - a complete switchgear for outdoor installation with a voltage of 35 kV can be used in electric step-up, step-down substations and distribution networks. (H) - this means that the design is designed for outdoor installation, i.e. in an open switchgear - (ORU).

KRU (N) 35 kV block structures are known as elements of open or closed switchgears in complete electrical substations with a voltage of 35 kV - 110 kV and above, manufactured by the plants of the Electroshield group SamaraElektroshield, MosElektroshield, UETM, SVEL, etc. [1, 2, 3, 4].

A block is a metal structure on which serial electrical equipment is assembled for its intended purpose, depending on the electrical function of the object circuit. These firms produce block switchgear at a voltage of 35 kV for placement in closed indoor switchgear (Closed switchgear) premises and open outdoor switchgear (Open switchgear) sites. Metal structures of 35 kV switchgear are intended for mounting electrical equipment on it: a tank or column switch, a pair of disconnectors with two or one grounding pole, a drive for switching, measuring current and voltage transformers, arresters and surge suppressors, these switchgear have almost the same advantages and disadvantages. In particular, these switchgear (N) 35 kV [1, 2, 3, 4] have significant disadvantages:

- for placement of switchgear (H) 35 kV, significant production areas are required, therefore, placement in closed capital premises is economically costly;

- designs of KRU(N) 35 kV are bulky and metal-intensive.

The aim of the present invention is a compact design of a voltage transformer cell for a complete switchgear with a voltage of 35 kV.

The goal is achieved by the fact that the device of a 35 kV voltage transformer cell, consisting of a transformer tank with low-voltage and high-voltage terminals, busbars with support insulators, a terminal cabinet, surge arresters, electrical circuit connectors, high-voltage fuses, fences and a service corridor, while at the end of the high-voltage outlet, the first part of the connector is additionally provided and fixed, the second part of the connector is fixed with the lower fuse clamp on the bolted flange of the surge arrester outlet, while the upper fuse clamp is fixed with the tip of the bolt clamp of the busbar loop on the support insulator, and the transformer tank is fixed with embedded releases on an additionally provided support platform, under the platform there is an additional chassis-frame with rollers for rolling out the transformer tank, and between the platform and the chassis-frame there is a platform lifting mechanism, while in turn the lifting mechanism is driven by a high-speed electric motor with a gearbox and a horizontal threaded shaft along the entire length, as well as hinged, both between themselves and the threaded shaft, two rods, the level of platform lifting height determines the disconnection or inclusion of parts of the connector, while for centering when raising or lowering the platform and thereby switching connectors when rolling out and grounding of the current carriers, at least two electro-optical blockings are additionally provided due to the laser red beam and, accordingly, the beam sensors.

The figure 1 (section) shows a 35 kV voltage transformer cell for the formation of block complete switchgears of electrical substations:

1. high-voltage output;

2. output low-voltage;

3. tank with winding in oil insulation;

4. connectors for electrical connection;

5. Surge suppressors surge arresters 35 kV;

6. terminal cabinet;

7. fuse 35 kV;

8. support insulator for the top clamp of the fuse and the lugs of the busbars;

9. busbar support insulator;

10. upper fuse clip;

11. locking position of the transformer in space;

12. supporting structure for fixing equipment flanges;

13. electric motor for lifting - lowering the transformer tank;

14. mechanism for lifting - lowering the switch;

15. loop from busbars;

16. rear wall of the enclosure of the KRU (N) 35 kV cell;

17. lower fuse clip;

18. rollers (wheels) of the chassis-frame for rolling out the cell from the workplace;

19. transformer tank support platform;

20. chassis-frame;

21. a cabinet for the formation of voltage bars;

22. alarm cabinet.

The proposed technical device works as follows: Initial mode: tank 3 (Fig. 1) of the transformer is located in a cell not at the workplace. The operating voltage is checked at the lower 17 terminal of the fuse 7 and at the upper connector 4 of the electrical connection with a high-voltage portable indicator. Check the operating voltage in the cabinet 6 at the terminals and the busbar formation cabinet 21 signaling in the cabinet 22 signaling the position of the correspondence of electrical circuits from the low-voltage terminals 2 of the transformer.

The platform 19 with the tank 3 is rolled into the cavity of the cell to the workplace and the position of the support platform 19 and the chassis-frame 20 of the transformer is checked by the latch 11 with indicators to match their workplace. Next, the electric motor 13 is turned on, the support platform 19 is raised by the lifting-lowering mechanism 14 to the required level so that the electrical connection connectors are in contact. In cabinets 21 for the formation of tires there will be an operating voltage, which will be information in the cabinet 22 of the alarm.

Used sources

1. "Catalogue KRU_SESH -59" Advertising leaflet SESH (Samara electrical panel);

2. JSC "UETM". High voltage equipment. Tank switches VGB, VEB-UETM. Advertising prospectus of the UETM plant (uralelektotyazhmash);

3. Svel.ru /catalog/ «kru-svel 35 kV» Advertising leaflet of the SVEL plant (Yekaterenburg).

4. "KRU Smart view" KRU series "Volga".

Claims (2)

1. 35 kV KRU (H) transformer cell device, consisting of a transformer tank with low-voltage and high-voltage terminals, busbars with support insulators, a terminal cabinet, surge arresters, electrical circuit connectors, high-voltage fuses, fences and a service corridor, characterized in that that the first part of the connector is additionally provided and fixed at the end of the high-voltage outlet, the second part of the connector is fixed with the lower fuse clamp on the bolted flange of the surge arrester outlet, while the upper fuse clamp is fixed with the tip of the bolt clamp of the busbar loop on the support insulator, and the transformer tank fixed with the help of embedded releases on an additionally provided support platform, under the platform there is an additional chassis-frame with rollers for rolling out the transformer tank, and between the platform and the chassis-frame there is a platform lifting mechanism, while in turn the lifting mechanism is driven by a high-speed electric motor with gear and a horizontal threaded shaft along the entire length, as well as hinged, both between themselves and the threaded shaft, two rods, the level of platform lifting height determines the disconnection or inclusion of the connector parts. 2. The device of the KRU (H) transformer cell according to claim 1, characterized in that for centering when raising or lowering the platform and thereby switching the connectors when rolling out and grounding the current carriers, at least two electro-optical blocking is additionally provided due to the laser red beam and, accordingly, beam sensors.

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