SU290370A1 - - Google Patents

Description

OPEN DISTRIBUTION DEVICES (HIGH VOLTAGE)

Open high-voltage switchgear is known for connecting a single-transformer substation to the network, which contains one portal with a set of vertical disconnectors mounted on it and a protective device. However, such devices require a large area to accommodate the apparatuses, making several portals for receiving air lines and connecting the apparatuses to each other, which increases the volume of building structures.

The purpose of the invention is to increase the compactness of the switchgear. For this purpose, single-phase switching devices are used as protection devices, for example, to three directions connected to several lines through vertical disconnectors installed on both sides of the portal.

The switchgear can be connected to a single-circuit line with double-sided or single-sided power or to a double-circuit line.

The drawings show basic single-line diagrams of the proposed device of a single-transformer substation connected to a single-circuit with double-sided switching with a switching device in three directions (Fig. 1), to a single-circuit with unilateral nitapy with a switching device in two directions (Fig. 2) and to a double-circuit lines with a switching device in two directions (Fig. 3).

The switching device 2 located under the portal 1 with arc arc extinguishing in SF6 gas is made in three directions and represents

is a set of three single-phase devices, replacing three three-phase separators. A one-way switchgear through a disconnector 3 of a vertical installation with a grounding plug is connected to

to the section of single-circuit lin1N1 4, the other direction through disconnector 5 to the section of line 6 so that it is included in the cutting of these lines, and the third panel - to the complete set of transformer substation 7 through output 8. The measuring current transformer 9 is turned on in the line circuit.

The kit of the transformer substation 7 includes a transformer (two-or three-winding) or an autotransformer,

Phase 10 and other accessories.

a math linear prefix that serves to connect the comilectual transformer iodine station 7 to the electric power lines.

The main structure of the device is an iortal (U-shaped support) 1, to the traverse of which the inputs of power lines 4 and 6 are attached. With the help of additional traverses or constructions, vertical disconnectors 3 1 5 are attached to the gantry. Measuring current transformers 9 are also posted to the portal (or attached to the structures). In addition, a lightning conductor is installed on the portal (not shown), in the case of high-frequency communications equipment, it is connected to the power line wires. Portals can be reinforced concrete or metal.

Extremely compact and also labor intensive and the cost of the described switchgear is provided by the combined use of a switching device, allowing you to easily connect lines compared to three separately installed three-phase separators, and disconnectors of a vertical installation, allowing you to conveniently connect a node to two lines ending in one portal.

The presence of a switching device 2 and a current transformer 9 makes it possible to perform a nodal station automatically and to ensure the separation of electrical networks and the increase in power supply reliability. For example, in the event of an accident on line 4 as a result of relay protection and linear automation, the switching device No. 2 attached to it is disconnected, and the substation continues to be powered from line 6. In case of an accident with a transformer, the direction of the switching device 2 connected to it is automatically disconnected m 4 ii 6 is preserved.

An open switchgear (automatic linear set-top box) can be performed as a complete set at the factory and installed as a finished product, or, due to the small amount of work, can be mounted on site.

A switchgear can be used to connect a transformer to a line with one-way power (Fig. 2). In connection with this, the switching device 2 is made in two directions, and the supply section of the line is connected to its midpoint.

A switchgear can also be used to connect a substation to a double-circuit transmission line 11-12.

and 13-14 (Fig. 3). In this case, the switching air condition 2 is made in two directions. The transformer is connected to the middle point of the switching device.

Subject invention

An open high-voltage switchgear for connecting a single-transformer substation to the network, containing one Nortal with a set of vertical disconnectors mounted on it and protecting the device, characterized in that, in order to increase the compactness, as a protective device

single-phase switching devices are applied, for example, to three directions, which are connected to several lines through the specified disconnectors installed on both sides of the portal.

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