RU31467U1 - Switchgear cabinet - Google Patents

Description

Switchgear cabinet

The utility model relates to devices for the distribution of electricity, and specifically to cabinets of complete distribution devices (switchgear).

The switchgear cabinet is known (see the industry catalog of the Energy and Electrification series. 6-10 kW outdoor switchgears of the outdoor installation of the K-47 series, M., 1985, Central Scientific and Research Institute for Energy and Electrification).

This switchgear cabinet contains a drawout element compartment, a relay cabinet is located above it, and an overpressure relief channel is located behind the relay cabinet. This channel connects the drawout element compartment to the atmosphere.

The disadvantage of this design of the switchgear cabinet is that in the upper part of the drawout element compartment, under the relay cabinet, the space is not filled with functional elements. The entrance from the withdrawable element compartment to the pressure relief channel is stepwise. This leads to the fact that in an emergency situation, at the time of the exit of gases from the compartment of the withdrawable element through the pressure relief channel, a zone of turbulence is formed at the inlet last.

The closest in technical essence is a cabinet of a complete switchgear, comprising a power equipment compartment with withdrawable elements combined with a frame with front doors, a linear busbar compartment, a busbar compartment and a relay compartment (RU 2172545 C1, class H2B 11/00, 2001).

The disadvantage of the prototype is the inconvenience of service and the risk of getting under voltage during operation.

НВВ 11/00

The task is achieved due to the fact that the cabinet of the complete switchgear contains the power equipment compartment with withdrawable elements, the busbar compartment and the relay compartment, combined with the frame with the front doors, equipped with a cable compartment, the power equipment compartment is separated by partitions from above - from the relay compartment, and back - from the busbar compartment and from below - from the cable compartment, and the frame is made with rear doors in the busbar compartment and in the cable compartment.

Private significant features are

- each compartment is equipped with a channel for relieving gas pressure with a valve located on the roof of the frame;

- the front door of the power equipment compartment is made with a window under the control panel for withdrawable elements and with a viewing window for the switch position;

- the cable compartment is located under the compartments of power equipment and busbars with the possibility of access to it through the corresponding front and rear doors;

- the front door of the cable compartment is made with viewing windows of the position of the grounding disconnector;

-relay compartment is removable;

- The rear doors are removable on bolted connections. The essence of the utility model is illustrated by drawings, where in FIG. 1

presents a view of the cabinet (switchgear) from the facade, figure 2 - section aa of fig. 1, FIG. 3 is a section BB of FIG. 2, FIG. 4 is a section CC of FIG. 1.

The typical design of the cabinet of the outgoing lines of the switchgear (ШОЛ) consists of the following main structural elements, united by a welded frame 5:

b) cable compartment - 2;

c) busbar compartment - 3;

d) relay compartment - 4.

For ease of installation of auxiliary circuits, the relay compartment is removable, however, when the cabinets are blown into the section, it is not possible to remove the compartment without removing the cabinet from the section.

From the front door of the 7 compartments, except for the relay 4 compartments, they are locked with special bolts 6 with a square insert of 7x7 mm and have locks against unauthorized access to the compartment.

The busbar compartment 3 includes a busbar system 14 and branches from the busbar mounted on the fixed contacts of the upper bushings of the cassette of the vacuum circuit breaker. Busbars 14 are made of bare copper (80x8 mm), branches from busbars are made of bare copper (80x8 and 60x10 mm). Busbars 14 are mounted on busbar holders and pass from one cabinet to another without any separation, thus forming a tire corridor extended over the entire length of the half-section. In the extreme cabinets of each half-section, the bus corridors are overlapped by a seam; the total walls of a steel sheet are thick; another 3 mm.

On the rear side of the busbar compartment 3, there is a channel 9 for depressurizing gases from the cable compartment 2, which is closed by a valve with a limit switch. The start of the arc protection is duplicated by a phototeristor installed in the compartment. A similar arc weld is available in the busbar compartment and in the power equipment compartment.

Branches from busbars 14 are attached to the bushings 10 of the cassette of the vacuum high-voltage circuit breaker or high-voltage jumper or draw-out structure of the voltage transformer. To compensate for thermal expansion in busbars 14

holes of oval shape with an index of 2D are made at the points of fastening of the tires 14 in the tire holders.

Compartment 1 of power equipment is structurally separated from compartment 3 of busbars and cable compartment 2 by a metal partition 11 of a thickness, other of 3 mm, to which passage insulators of the vacuum circuit breaker are attached.

On the lower side, the compartment 1 of the power equipment is separated from the cable compartment 2 by a two-layer metal partition 11 with an air gap (package thickness - 55 mm). The drive of the ground disconnector is attached to the bottom continuous sheet of the partition 11.

From the relay compartment 4, the compartment 1 of the power equipment is separated by a partition 11 with plug connectors installed in it.

The frame 5 is made with rear doors 15 in the compartment 3 of the busbars, cable compartment 2. The rear doors 15 are removable on bolted connections. This allows you to maintain the cable compartment from two sides.

The front door 7 of the cable compartment 2 is provided with viewing windows 13 for the position of the grounding disconnector.

Cable compartment 2 is located under the compartments of power equipment 1 and compartment 3 busbars.

The front door 7 of the compartment 1 of the power equipment is made with a window under the control panel of the withdrawable elements, and it also has a viewing window 18 in the front door 7 for visual control of the position of the switch.

In each compartment there is a channel for gas pressure relief with a valve 12 located on the roof of the frame 5, which ensures the safety of personnel in the switchgear in the event of a short circuit. Metal partitions 11 separating compartments from each other

/ ///////

4 friends exclude accidental contact with live

parts of other compartments.

The rear doors 15 in the compartments increase serviceability.

Thus, the switchgear cabinet increases safety and ease of maintenance.

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5

Claims (7)

1. The cabinet of the complete switchgear, comprising the power equipment compartment with withdrawable elements combined with the frame with the front doors, the busbar compartment and the relay compartment, characterized in that it is equipped with a cable compartment, the power equipment compartment is separated by partitions from above from the relay compartment, from the back busbar compartment and from below - from the cable compartment, and the frame is made with rear doors in the busbar compartment and cable compartment. 2. The cabinet according to claim 1, characterized in that each compartment is equipped with a channel for relieving gas pressure with a valve located on the frame cover. 3. The cabinet according to claim 1, characterized in that the front door of the power equipment compartment is made with a window for the withdrawable elements control panel and with a viewing window for the switch position. 4. A cabinet according to any one of claims 1 to 3, characterized in that the cable compartment is located under the compartments of the power equipment and busbars with the possibility of access to it through the corresponding front and rear doors. 5. A cabinet according to any one of claims 1 to 4, characterized in that the front door of the cable compartment is made with viewing windows of the position of the grounding disconnector. 6. Cabinet according to any one of claims 1 to 5, characterized in that the relay compartment is removable. 7. A cabinet according to any one of claims 1 to 6, characterized in that the rear doors are removable on bolted connections.