SU399951A1 - OPEN HIGH-SPEED DISTRIBUTION DEVICE - Google Patents

Description

I

The invention relates to the field of construction of open high voltage switchgear for power plants and substations.

In power stations and substations, whose switchgears are nodes of a high-voltage network, it is inevitable to use circuits with a large number of switches.

A high voltage open switchgear is known, made according to a scheme, for example, with two working and bus bypass systems, containing bypass disconnectors, separators, line and bus portals, switches, to which two connections are connected after the line disconnector. In this device from busbars, the busbar of the cell through the disconnectors gets on the switch and the current transformer. After the linear disconnecting device, the cell busbar is connected to the bus bypass system via the bypass disconnector. A line or transformer output is connected between the line and bypass isolators. In such a switchgear, the number of switches is equal to the number of connections, plus the busbar and bypass switches.

A significant number of switches, which is the most expensive of them, an element of the switchgear, leads to a rise in the cost of the device and an increase in its size.

The purpose of the invention is to reduce the number of switches and northals.

This is achieved by connecting to the switches after the linear disconnectors two connections connected to the opposite sides, equipped with separators and current transformers, disposed with

the outer sides of the working and bypass tires, i.e. from the outer sides of the switchgear.

FIG. 1 shows the proposed device, the plan; in fig. 2 - the same section along

the cell.

From busbars 1 and 2, the busbar busbar, via bus disconnectors 3 and 4, goes to switch 5 and current transformer 6 (common to both connections). After sheathing, his

the linear disconnector 7 through the bypass disconnector 8, the busbar cell is connected to the bus bypass system 9. The device also contains two terminals - line 10 and transformer 11. Each terminal has

current transformer 12 and the separator 13. The transformer, in addition, is equipped with a short circuit 14.

In the event of a short circuit on the line or in the transformer, the switch 5 is turned off,

then, in the empty pause, the separator 13, after which the switch 5 is turned on again.

Normal disconnection and switching on of lines and transformers can be done either only by the separator 13, or during a dead pause, i.e., disconnecting and restarting the switch 5, depending on the magnitude of the load and idle currents.

In order to do without two additional portals (in the case of a step-keel installation of bypass disconnectors), the busbar between the linear disconnector 7 and the separator 13 passes through their columns.

This technical solution can be used for other schemes and arrangements of switchgear.

Subject invention

Claims (2)

1. Open high-voltage switchgear, made according to the scheme for example, with two working and bus bypass systems, containing, its bypass disconnectors, separators, line and bus portals, switches, to which two connections are connected after the linear disconnector, characterized in that, in order to reduce the number of switches, the connections are in opposite directions , are equipped with separators and current transformers located on the external sides of the switchgear. 2. The device according to claim 1, characterized in that, in order to reduce the number of portals, a busbar is mounted on the columns of the bypass disconnectors between the linear disconnector and the separator of one of the connections. Rig 7 ag. g