RU16971U1 - CABINET OF COMPLETE DISTRIBUTION DEVICE - Google Patents

Description

2000121465

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20do

CABINET OF COMPLETE DISTRIBUTION DEVICE

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

Known prefabricated chamber for a complete switchgear. A design feature of this device is the arrangement of devices across busbars, which minimizes the overall dimensions of the switchgear cabinet as a whole (V. Ten, “KSO-10E1 series cameras, information and reference publication“ Electrical Engineering News, No. 3-4, 2000).

The closest technical solution for the totality of features to the claimed model is a cabinet of a complete medium voltage switchgear, consisting of a housing divided into a busbar compartment, a drawer compartment, a cable compartment, a low voltage compartment, a gas outlet (ALSTON, TRANSMISSION & DISTMBUTION catalog - Appareillage Moueppe (Tension Boulevard de la Resistance - BP4019-71040 MACON CEDEX9). The main feature of this switchgear is that the switch, which can be rotated 90 °, performs the function of a high-voltage circuit disconnector. The switch is placed in a rotary insulator, creating a dual-purpose module.

M.KL.-Н02В 11/00, 11 / 28.13 / 00

A disadvantage of the known cabinet is that a relatively large area is required for the rotation of the switch, which accordingly leads to an increase in the overall dimensions of the switchgear cabinet.

The design of the claimed nolose model makes it possible to reduce the overall dimensions of the cabinet, which in general will reduce the cost of capital construction.

The specified technical result during drainage of the claimed utility model is achieved mainly by the fact that the cabinet of the complete switchgear contains a housing divided into a cable compartment with an earthing switch, one end of the control shaft of which goes to the front panel of the cabinet, and a drawer compartment with a curtain mechanism installed , as well as a sliding element with a switch acting as a disconnector, the poles of which are located along the depth of the cabinet. The switch is mixed in the cabinet in both horizontal and vertical directions, and the length of the vertical movement is greater than or equal to the distance of the insulating air gap, which in turn corresponds to the voltage for which the switchgear is designed. The terminals of the vertically arranged switch poles are movable contacts of the disconnector and are also located vertically. The fixed contacts of the disconnector are mounted directly on the busbars and the power cable insulator or current transformer. Cable compartment

separated from the drawer compartment by an insulating partition. The feed-through type current transformer is installed on the partition between the busbar and drawer compartments, the diameter of the upper part of the circuit breaker pole being smaller than the internal feed-through diameter of the current transformer. The distance along the insulation surface from the input to the output of the circuit breaker poles is two or more times the length of the creepage distance to the corresponding voltage. On the internal contact part of the grounding knives of the ground electrode, additional contact pads made of copper are installed by welding

Figure 1 shows a front view (without front panel) of the enclosure of the complete switchgear with closed contacts (switch in the upper position), figure 2 shows the same view, but with open contacts (switch in the lower position), in Fig.Z a front view (without front panel) of a cabinet of a complete switchgear with a measuring transformer with open contacts is shown, Fig. 4 shows grounding knives.

The proposed cabinet of the complete switchgear consists of a housing divided by partitions into a cable compartment 1, a drawer compartment 2, a busbar compartment 3. As can be seen in FIG. 1, a power switch 4 is located on the movable support in the drawer compartment 2. The movable support consists of a frame 5 and bracket 6,

moving up and down on vertical guides on which this switch 4 is installed. This vertical movement of the switch 4 is ensured by articulated arms 7 located between the frame 5 and the arm 6, moving together, for example, according to the principle of a screw pair. The switch 4 is equipped with disconnecting movable contacts 8 and 9, which, when the switch 4 moves vertically upward, engage with the fixed contacts 10 and 11. The fixed contact 11 is supported by the insulator 12 located in the compartment of the prefabricated busbars 3 and is connected to the busbar system through the busbars 13.

In the cable compartment 1 is an earthing switch mounted on a frame that is mounted on the cabinet body.

In accordance with one form of the design of the switchgear cabinet, a support insulator 14 is placed in the cable compartment 1, with a sheath 15 mounted on it, made in the form of a bracket, on which the fixed contact 10 is placed. A power cable 16 is connected to this bus from the cable tray 16. In addition , the ground electrode has a shaft 17 on which movable grounding knives 18 are fixed, on the contact parts of which copper plates 19 are welded (Fig. 4). One end of the shaft 17 is displayed on the front panel of the switchgear cabinet.

a current transformer 21 of a passage type with an inner diameter of the passage hole sufficient for free passage of the upper part of the pole of the switch 4 into it.

In accordance with another design of the switchgear cabinet (Fig. 3), a current transformer 22 is installed in the cable compartment 1 instead of the supporting insulators 14.

To reduce the overall width of the switchgear cabinet, the partition 23 between the cable compartment 1 and the drawer compartment 2 is made insulating.

The insulating distance on the surface of the insulator between the movable contacts 8 and 9 of the disconnector is greater than two creepage distances to a given voltage, since when the movable contacts of the disconnector 8 and 9 are closed, a grounded partition 20 passes between them, separating the busbar compartment 3 from the drawer compartment 2.

The proposed device operates as follows.

To bring the complete switchgear into working condition, the retractable element with the switch 4 located on it in its extreme lower position rolls into the cabinet and is fixed there in the control position. In this case, the curtain mechanism provides access to the busbars 13. Grounding knives 18 at this moment open, assuming a vertical position. Using the manual handle on the front panel of the switchgear cabinet (not shown),

which through the system of screw pairs and articulated levers moving along the vertical guides of the frame 5 of the movable support raises the bracket 6 with the switch 4. The vertical movement of the switch 4 with the movable contacts of the disconnector 8 and 9 continues until the upper part of its pole with the movable contact of the disconnector 9 located on it enters the passage hole of the current transformer 21 until the movable contact of the disconnector 9 engages with the fixed contact 11 installed on the busbars 13, and the second movable contact of the disconnector 8 is engaged with the fixed contact of the bus 10 mounted on the supporting insulator 14 (Fig. 1) or a current transformer and 22 (FIG. 3) and connecting it to the power cable 16. Thus, the power switch 4 connects the busbars 13 with the power cable 16.

In order to bring the device into a repair position (figure 2), actions are performed opposite to those described above.

Claims (7)

1. A cabinet of a complete switchgear, comprising a housing divided into a cable compartment with an earthing switch, one end of the control shaft of which goes to the front panel of the cabinet, a drawer compartment in which the curtain mechanism is installed, and a drawer with a switch acting as a disconnector, pole which are located along the depth of the cabinet, characterized in that the switch moves in the cabinet both horizontally and vertically, and the length of the vertical movement is greater than equals the distance the insulating air gap, corresponding in turn to the voltage at which the dispenser is designed.  2. The cabinet according to claim 1, characterized in that the conclusions of the vertically arranged poles of the switch are movable contacts of the disconnector and are also located vertically.  3. The cabinet according to claim 1, characterized in that the fixed contacts of the disconnector are mounted directly on the busbars and the insulator for attaching the power cable or current transformer.  4. The cabinet according to claim 1, characterized in that the cable compartment is separated from the drawer compartment by an insulating partition.  5. The cabinet according to claim 1, characterized in that the feed-through current transformer is installed on the partition between the busbar and drawer compartments, the diameter of the upper part of the switch pole being smaller than the feed-through diameter of the current transformer.  6. The cabinet according to claim 1, characterized in that the distance along the insulation surface from the input to the output of the switch poles has a value that is two or more times the creepage distance to the corresponding voltage. 7. The cabinet according to claim 1, characterized in that on the inner contact part of the grounding knives of the ground electrode, additional contact pads made of copper are mounted by welding.