RU1772851C - High-voltage switchgear - Google Patents

Abstract

SUMMARY OF THE INVENTION: A switchgear comprises chains of two circuit breakers and connections between circuit breakers, three busbar systems. One chain of switches is connected to the first and second bus systems, the second chain to the second and third. Switches of both chains connected to a second busbar system. bridged with jumpers with disconnectors. 1 s.p. 3-ill.

Description

The invention relates to electrical engineering, to high voltage switchgear circuits, and can be used in power plants and substations.

A high voltage switchgear (1) is known in which two busbar systems are connected by a chain of three switch cells with two connections between them.

The disadvantage of this device is the low reliability of the circuit for any switching, for example, disconnecting a line when two switches connected to this connection are disconnected. At the same time, the middle circuit breaker switches twice as much as the extreme switches, faster generates a resource and reduces the service life of the switchgear.

Closest to the proposed solution is a high voltage switchgear containing two busbar systems and

chains of two switches with connections between them (2).

The disadvantage of the prototype is that, when repairing busbars and (or) repairing any circuit breaker, the reliability of the device decreases and, with the simultaneous failure of the second circuit breaker, an accident can develop.

The aim of the invention is to increase the reliability of high voltage switchgear in the repair of any circuit breaker and any busbar system.

This goal is achieved in that the high voltage switchgear, containing two busbar systems and chains of two circuit breakers with connections between them, is equipped with an additional busbar system and two jumpers with disconnectors, moreover, one chain is connected to the first and second bus systems , the second chain - to the second and additional system VJ

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busbars, and jumpers with disconnectors are shunted by switches of both chains connected to the second bus system.

In addition, in the switchgear, a jumper with a disconnector is connected at one end between the circuit breaker and its bus disconnector of the second bus system, and at the other end to the connection point of the connection.

The difference of the invention is that the device is equipped with an additional busbar system and two jumpers with disconnectors, moreover, one chain is connected to the first and second bus systems, the second chain to the second and additional bus systems, and the switches of both are connected with jumpers with disconnectors chains connected to a second bus system.

The implementation of this solution improves the reliability of the device during the repair of any circuit breaker and any busbar system.

The proposed device is illustrated by drawings, where:

in FIG. 1 shows an electrical diagram of a switchgear;

in FIG. 2,3 - shows the various operating states of switchgear boxes.

The high voltage switchgear, containing two systems of -1.2 busbars and a chain of two switches 3.4 and 5.6 with 7.8 connections between them, is equipped with an additional system 9 with busbars and two jumpers 10.11 s disconnectors 12,13, moreover, one chain is connected to the first and second bus systems, the second chain to the second and additional bus systems, and jumpers 10,11 with disconnectors 12,13 are bridged by switches 4,5 of both chains connected to the second bus system through bus disconnectors 14.15.

The connection 7 is connected to the block 16, and the connection 8 is connected to the air line 17, which are not shown in the drawing. The operation of the device is illustrated in Fig. 2,3.

In FIG. 2 shows the position of the apparatus when repairing the busbar system 2 or repairing the switch 5. In this case, the 1.9 busbar systems are under operating

voltage, closed circuit of switches 3,4,6. Disconnectors 13,14,15 are open. Block 16 and line 17 are connected, the switchgear is operated according to scheme 3/2.

On Fig, 3 shows the position of the devices when repairing the system 9 busbars or repairing the switch 6.

The bus systems 1 and 2 are energized. The circuit breaker is closed.

3,4,5. Disconnectors 12.15 are closed, disconnectors 13.14 are open. Block 16 and line 17 are connected, the switchgear is operated according to scheme 3/2, without compromising reliability.

Thus, the claimed solution ensures reliable operation of the switchgear during the repair of any switch and any busbar system, and also increases the service life of the middle switch by reducing the number of switching operations during switchgear operation.

Claims (2)

1. A high voltage switchgear comprising two busbar systems and chains of two circuit breakers with connections between them, characterized in that, for the purpose of To improve reliability, it is equipped with an additional busbar system and two jumpers with disconnectors, with one chain connected to the first and second bus systems, a second chain to the second and additional bus systems, and switches of both chains connected to the second system are shunted with jumpers with disconnectors tires. 2. The device according to claim 1, characterized in that the jumper with a disconnector at one end is connected between the switch and its bus disconnector of the second bus system, and at the other end to the connection point of the connection. Vv i Z Shchig.g i 1 ShiaZ