CN215732716U - A plug-in device for reducing the heating rate of the connector of a draw-out low-voltage switch cabinet - Google Patents
A plug-in device for reducing the heating rate of the connector of a draw-out low-voltage switch cabinet Download PDFInfo
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- CN215732716U CN215732716U CN202121890836.5U CN202121890836U CN215732716U CN 215732716 U CN215732716 U CN 215732716U CN 202121890836 U CN202121890836 U CN 202121890836U CN 215732716 U CN215732716 U CN 215732716U
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- reducing
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 14
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 34
- 229910052802 copper Inorganic materials 0.000 claims abstract description 34
- 239000010949 copper Substances 0.000 claims abstract description 34
- 238000005192 partition Methods 0.000 claims abstract description 8
- 230000003068 static effect Effects 0.000 claims description 20
- 230000020169 heat generation Effects 0.000 claims description 4
- 238000010276 construction Methods 0.000 abstract description 5
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 2
- 230000002238 attenuated effect Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 230000016507 interphase Effects 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
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Abstract
The utility model provides a plugging device for reducing the heating rate of a plug connector of a draw-out type low-voltage switch cabinet, which comprises a switch cabinet, wherein a plurality of switch cabinet drawers are sequentially arranged in the switch cabinet from top to bottom, and each switch cabinet drawer corresponds to a corresponding single outlet loop partition plate; the connector at each electrical connection point is transformed from the original one group into two groups of connectors with the same type and specification which are connected in parallel to operate, the sum of the elastic sheet pressure between the movable contact and the fixed contact of the connector at each electrical connection point can be increased, and when the pressure of the elastic sheet is increased, the contact resistance can be effectively reduced, and the heating is reduced; through increasing three short circuit copper bars, both increased the area of contact of connector wiring copper bar with the cable clamp, made things convenient for the cable junction construction again, eliminated the hidden danger that generates heat.
Description
Technical Field
The utility model relates to the technical field of power distribution construction, in particular to a plugging device for reducing the heating rate of a plug connector of a draw-out type low-voltage switch cabinet.
Background
In recent years, with the rapid development of urban residential communities, the low-voltage complete draw-out switch cabinet is generally applied to community power distribution construction due to the advantages of strong universality and compact structure. The company engineering department finds that the following distribution equipment in a plurality of residential districts in an urban area 30 in the operation and maintenance process: the GCS low-voltage switch cabinet has the following hidden dangers in operation: the current 630A loop interval is that the primary connector is very easy to generate heat when the working current is more than 500A or when the primary connector is operated at full load, the interphase insulation resistance of the equipment is reduced when the equipment is operated at high temperature for a long time, and the short-circuit fault caused by flash arc is easy to occur, so that the operation safety and the power supply reliability of the equipment are greatly reduced.
Through a large number of research studies, the reason for causing the low-voltage complete set draw-out type switch cabinet 630A connector to generate heat in operation is found to be two:
1) the contact resistance between the movable contact and the fixed contact of the connector becomes large: frequent operation of a switch handcart causes grinding marks between a movable contact and a fixed contact of a connector, and the contact resistance between the movable contact and the fixed contact is increased; when the loop current is more than 500A or the connector runs at full load, the contact resistance between the moving contact and the fixed contact is increased to cause the connector to generate heat, the continuous high temperature also causes the elastic sheet between the moving contact and the fixed contact of the connector to deform, the compression force between the contacts is attenuated, and the contact resistance between the moving contact and the fixed contact of the connector is further increased to cause the connector to generate heat continuously;
2) the contact area of the connector wiring copper bar and the cable wiring bar is not enough. Because the whole set draw-out type low-voltage switch cabinet structure is through gathering together, cable connection row and connector copper bar junction construction space are narrow, lead to the effective overlap joint sectional area of connector and cable connection row to reach the standard requirement easily, can cause the tie point to generate heat when the through-current is greater than 500A in the operation, including the heat that the connector contact conduction was come, formed the heat accumulation, the space is narrow and small is unfavorable for thermal giving off again. Connect the long-term high temperature of face and lead to the copper bar oxidation with higher speed, copper bar connecting point contact resistance further increase after the oxidation leads to the connector to continuously generate heat.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide the plugging device for reducing the heating rate of the plug-in connector of the draw-out type low-voltage switch cabinet, aiming at overcoming the defects of the prior art, so that the hidden danger of heating can be eliminated, and the operation safety and the power supply reliability of equipment are improved.
In order to achieve the purpose, the utility model adopts the following technical scheme:
the utility model provides a plugging device for reducing the heating rate of a plug connector of a draw-out type low-voltage switch cabinet, which comprises a switch cabinet, wherein a plurality of switch cabinet drawers are sequentially arranged in the switch cabinet from top to bottom, and each switch cabinet drawer corresponds to a corresponding single outlet loop partition plate;
and four static plug-in units are arranged on each single outlet loop partition plate, and are arranged side by side in pairs and in parallel at intervals along the width direction of the drawer of the switch cabinet. .
Furthermore, the tail end of the switch cabinet drawer is provided with four movable inserts, and every two movable inserts are arranged side by side and are arranged in parallel along the width direction of the switch cabinet drawer at intervals.
Furthermore, when the drawer of the switch cabinet is drawn out or closed, the static plug-in unit on one side is disconnected or connected with the movable plug-in unit; and the other side of the movable plug-in is connected with six second copper bars.
And on the other side, a group of static plug-in units are respectively connected with a cabinet top bus bar after being in short circuit by a first copper bar along the width direction of the switch cabinet drawer according to the phase A, the phase B and the phase C.
And furthermore, the other group of static plug-in units on the same side are respectively connected with an outgoing cable after being in short circuit with the second copper bar along the width direction of the drawer of the switch cabinet according to the phase A, the phase B and the phase C.
Furthermore, the number of the second copper bars is nine, the number of the copper bars is 110mmx80mmx6mm, and the surface of each second copper bar is plated with tin.
Further, the rated working current of the connector is 630A.
The utility model has the beneficial effects that: the primary connectors on each 630A loop in the switch cabinet are transformed from one original group into two groups of connectors with the same type and specification which are connected in parallel, so that the pressure sum of the elastic sheets between the moving and static contacts of the connectors can be increased, the contact area of the electrical connection points at the transformed positions can be increased, and when the contact area of the electrical connection points and the pressure sum of the elastic sheets are increased, the contact resistance can be effectively reduced, and the heat generation at the electrical connection points is restrained;
through increasing nine short circuit second copper bars, both increased the area of contact of connector wiring copper bar and cable clamp, made things convenient for the cable junction construction again, eliminated the hidden danger that generates heat.
Drawings
FIG. 1 is a schematic view of the mounting structure of the static plug-in unit of the present invention;
FIG. 2 is a schematic diagram of a case-mounted structure of the movable plug-in unit of the present invention;
fig. 3 is a schematic structural diagram of the connection of the static plug-in unit and the short-circuit copper bar and the cable wiring copper bar.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.
Referring to fig. 1 to 3, an inserting device for reducing the heat generation rate of an inserting connector of a draw-out type low-voltage switch cabinet comprises a switch cabinet, wherein the switch cabinet sequentially comprises a plurality of switch cabinet drawers 5 from top to bottom, and each switch cabinet drawer 5 corresponds to a corresponding single outlet loop partition plate 7;
four static plug-in units are arranged on each single outlet loop partition plate 7, and are arranged side by side in pairs and in parallel at intervals along the width direction of the drawer of the switch cabinet.
The tail end of the switch cabinet drawer 5 is provided with four movable plug-ins 1, and the movable plug-ins 1 are arranged side by side in pairs and are arranged in parallel at intervals in the width direction of the switch cabinet drawer 5.
Since, as the load increases above about 500A, the operating temperature of the moving and static inserts 1, 2 is typically between 70 and 90 degrees. After the high-temperature high-voltage switch runs at high temperature for a long time, the pressure elastic sheet of the contact of the movable plug-in unit 1 deforms, the compression force is attenuated, the contact point of the movable plug-in unit 1 is loosened due to insufficient pressure of the elastic sheet, the contact resistance is further increased, the temperature rise of the movable plug-in unit 1 and the static plug-in unit 2 is aggravated, the oxidation of the surface of the contact is accelerated, after long-time vicious cycle, the insulation of the plug-in units at high temperature is reduced, and the interphase flash arc short circuit damages equipment.
Specifically, a static plug-in unit 2 with the same capacity and the same specification and model is added on each static plug-in unit 2, and a movable plug-in unit 1 with the same capacity and the same specification and model is added on each movable plug-in unit 1 at the tail end of each switch drawer. The pressure of the elastic sheet between the movable contact and the fixed contact of the connector at the same electrical connection point is doubled, so that the plugging resistance between the plug-in units is greatly reduced, and the heating is reduced.
When the drawer 5 of the switch cabinet is drawn out or closed, the static plug-in 2 at one side is disconnected or connected with one side of the dynamic plug-in 1; the other side of the movable plug-in 1 is connected with six second copper bars 302.
And on the other side, a group of static plug-in units 2 are respectively connected with a cabinet top busbar by using first copper bars in short circuit along the width direction of the switch cabinet drawer 5 according to the phase A, the phase B and the phase C.
On the same side, the other group of static plug-in units 2 are respectively connected with the outgoing cables after being in short circuit with the second copper bars 302 along the width direction of the switch cabinet drawer 5 according to the phase A, the phase B and the phase C.
The single outgoing line loop partition plate 7 and the static plug-in 2 on the side away from the switch cabinet drawer 5 are connected with the busbar through a first copper bar, and the other group is connected with an outgoing line cable through a second copper bar 302.
The wiring terminals of the movable plug-in units which are connected in parallel in pairs at the tail end of each switch drawer are respectively connected with the inlet side and the outlet side of the switch in the switch drawer after being in short circuit according to the A phase, the B phase and the C phase by three copper bars.
Specifically, every group is respectively with the copper bar short circuit with A looks, B looks and C looks of the quiet plug-in components that are connected with the cable, because the increase of copper bar and the increase of copper bar area, has effectively increased the area of contact of connector binding post and cable connection row, has eliminated the hidden danger that generates heat.
Nine second copper bars 302 are provided, the copper bars 3 are 110mmx80mmx6mm, and the surfaces of the second copper bars 302 are plated with tin.
The rated working current of the connector is 630A.
The above-mentioned embodiments only express the embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (7)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121890836.5U CN215732716U (en) | 2021-08-13 | 2021-08-13 | A plug-in device for reducing the heating rate of the connector of a draw-out low-voltage switch cabinet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121890836.5U CN215732716U (en) | 2021-08-13 | 2021-08-13 | A plug-in device for reducing the heating rate of the connector of a draw-out low-voltage switch cabinet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215732716U true CN215732716U (en) | 2022-02-01 |
Family
ID=79995566
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121890836.5U Active CN215732716U (en) | 2021-08-13 | 2021-08-13 | A plug-in device for reducing the heating rate of the connector of a draw-out low-voltage switch cabinet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215732716U (en) |
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2021
- 2021-08-13 CN CN202121890836.5U patent/CN215732716U/en active Active
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