RU57520U1 - COMPACT DISTRIBUTION DEVICE - Google Patents

Abstract

The utility model relates to the field of electrical engineering, namely to high voltage switchgears (RU), primarily to switchgears with busbars and single-row circuit breakers. The essence of the utility model is that in a known switchgear comprising busbars, circuit breakers, bus disconnectors, line disconnectors, high-frequency arresters, other high-voltage devices, according to the utility model, bus disconnectors are installed above the line disconnectors at a distance from the grounded parts of the bus disconnector to energized parts of the linear disconnector not less than the phase-to-ground distance, and the busbar between busbar disconnectors and circuit breakers Nena rigid, and high-frequency chokes installed at another high-voltage apparatus. The proposed solution allows you to create a small-sized compact switchgear, consisting of several transportable units manufactured and assembled at the plant, not requiring an increase in the area occupied by it and simplifying the reconstruction of old switchgears.

Description

The utility model relates to the field of electrical engineering, namely to high voltage switchgears (RU), primarily to switchgears with busbars and single-row circuit breakers.

Known switchgear with busbars with a single-row arrangement of switches, for example, switchgear with suspended disconnectors (L.I.Dvoskin. Circuits and designs of switchgears. M: Energoatomizdat, 1985. Fig. 2, 5, 3, p. 166).

Known open switchgear with support disconnectors with a single-row arrangement of switches (see Typical design "Open switchgear 110 kV on unified structures", No. 407-03-539-90, Energosetproekt, inv. No. 13189-tm), adopted for the prototype. It has two systems (sections) of busbars mounted on portals. From the bus system, through a bus disconnector, switch, line disconnector, by means of communication through a high-frequency trap, connection is made to a high-voltage line (VL). All devices in the RU are installed at approximately the same height (2.5 m from the ground to china).

The disadvantage of this design is that it requires a large area for placement, which complicates the reconstruction of obsolete switchgears when it is necessary to place switchgears with an increased number of connections on a small site.

The objective of this utility model is to create a compact switchgear, consisting of several transportable units manufactured and assembled at the plant, not requiring an increase in the area occupied by it and simplifying the reconstruction of old switchgears.

The solution to this problem is achieved by the fact that in the well-known switchgear containing busbars, circuit breakers, busbar disconnectors, linear disconnectors, high-frequency traps, other high-voltage devices,

the connection of high-voltage apparatuses with overhead lines and transformers (T), busbar and building portal structures, the indicated busbar disconnectors are installed above the linear disconnectors at a distance from the grounded parts of the busbar disconnector to the energized parts of the line disconnector not less than the phase-to-ground distance, and the busbar between bus disconnectors and switches are made rigid, and the high-frequency trap is installed on another high-voltage device.

Figure 1 presents conventionally three cells of a compact switchgear filled according to the scheme "One sectioned tire system"; figure 2 presents a compact RU, a cut along a linear cell; figure 3 is the same as in figure 2, but with core switches and installed next to the current transformers.

In cell 1 (Fig. 1) - linear - there are busbars, high-voltage switching devices and VL devices, in cell 2 - busbars and high-voltage devices installed in the transformer cell, and in cell 3 - high-voltage busbar connecting devices.

The diagram (figure 1) presents one of the possible locations of the devices relative to the busbars. Other combinations are possible, for example, with the overhead line and T output in one direction, with the location of all devices on one side of the busbars, etc.

The compact switchgear contains busbars 1, mounted on supporting insulators 2, mounted on the portal bushes 3. On the same supports 3 busbar disconnectors 4 are installed with an earthing switch, connected by a hard bus 5 to the switches 6. Tank switches can be used as switches 6 (Fig. .2) or core switches (FIG. 3).

After the switch 6, under the bus disconnector 4 there is a linear disconnector 7 with an earthing switch and then other high-voltage devices, including, for example, a voltage transformer 8, a high-frequency trap 9 and a coupling capacitor 10.

High-frequency trap 9 is installed on the coupling capacitor 10, but it can be installed on another high-voltage apparatus or on a reference insulator.

Using communication 11, the wires 12 of the high-voltage line (VL) are connected to the high-frequency trap 9 and then through the switch 6 and other devices to the busbars 1.

If the connection 11 is connected to the wires leading to the transformer, then instead of the coupling capacitor 10 and the high-frequency trap 9, a surge suppressor is installed (Fig. 1, cell 2).

Communications 11 and wires of OHL 12 with the help of insulators are fixed on a linear portal 13 installed between the systems (sections) of busbars 1.

The switch 6, the linear disconnector 7, the voltage transformer 8 (or current transformer 14, if it is not integrated in the switch) and other devices can be installed, as shown in figure 2, on one frame 15. In this case, the linear disconnector 7 (its parts under voltage), installed under the bus disconnector 4, must be separated from the grounded parts of the bus disconnector 4 at a distance of not less than the phase-to-ground distance (A _phz ).

Electric motor drives of disconnectors and grounding conductors are installed on metal structures, on which disconnectors and grounding conductors are installed (not shown in Fig.). The installation location and the number of grounding conductors - as in typical schemes.

When the switch 6 is turned on and the disconnectors 4 and 7 are turned on, the electric current from the busbars 1 through the disconnector 4, the hard bus 5, the switch 6, the disconnector 7, the bus with a voltage transformer 8 connected to it, a high-frequency trap 9, communication 11 is supplied to VL 12.

When the circuit breaker 6 and disconnectors 4 and 7 and the earthing switches are turned on (not shown in FIG.) On the circuit breaker 6 and other devices that are removed to the required distance from the live busbars, repair work and maintenance work can be performed.

The claimed technical solution allows to create a compact compact RU.

Claims (3)

1. A compact switchgear including busbars, circuit breakers, busbar disconnectors, line disconnectors, high-frequency arresters, other high-voltage devices, communications of high-voltage devices with overhead lines and transformers, busbars and building portal structures, characterized in that the busbar disconnectors are installed above the linear disconnectors on the distance from the grounded parts of the busbar disconnector to the live parts of the line disconnector is not less than the phase-to-ground distance. 2. The compact switchgear according to claim 1, characterized in that the busbar between the busbar disconnectors and the switches is rigid. 3. The compact switchgear according to claim 1, characterized in that the high-frequency trap is mounted on another high-voltage apparatus.