CN218352001U - Safe wiring structure of low-voltage drawer type switch cabinet - Google Patents
Safe wiring structure of low-voltage drawer type switch cabinet Download PDFInfo
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- CN218352001U CN218352001U CN202222529160.8U CN202222529160U CN218352001U CN 218352001 U CN218352001 U CN 218352001U CN 202222529160 U CN202222529160 U CN 202222529160U CN 218352001 U CN218352001 U CN 218352001U
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Abstract
The utility model discloses a low pressure drawer type switch cabinet's safe wiring structure, its internally mounted who mainly is at the switch board body has the insulation board, and from last to installing main circuit breaker respectively down on the insulation board, a plurality of branch circuit breakers and correspond every ac contactor and the electrothermal relay that divide the circuit breaker to be equipped with, replace the extrusion contact wiring connected mode of the contact of extrusion formula spring and main bus-bar among the original low pressure drawer type switch cabinet by fixed wiring mode, specifically be the circuit breaker of connecting in every drawer, components and parts migration such as ac contact come out and install on the great insulation board in switch board body space, its main bus-bar is connected the branch circuit breaker in original each drawer major loop through main circuit breaker, ac contactor, then be connected with the place motor through reconnection electrothermal relay, with this solution contact firm and lead to the contact problem of melting even that generates heat.
Description
Technical Field
The utility model belongs to the technical field of distribution equipment, concretely relates to is a safe wiring structure of low pressure drawer type switch cabinet.
Background
The transformer substation of a certain chemical industry of our group is shared by 4 groups of high-capacity low-voltage drawer type switch cabinets, and the loads of the 4 groups of high-capacity low-voltage drawer type switch cabinets mainly comprise 6 KW motors, 4 45KW motors and 10 37KW motors. The main circuit connection mode of the low-voltage drawer type switch cabinet is that the small busbar is connected by the inserting pieces, the contact area is small, heating and even melting of a main circuit cable plug often occur in daily operation, and the insulation strength of the cable is reduced. In addition, each drawer in the low-voltage drawer type switch cabinet is connected with a main bus of the power distribution cabinet through a contact of an extrusion type spring, the contact is very easy to heat or even melt when the operation time is long or the load capacity is large, the space in the drawer is narrow, the operation is difficult to take place, and time and labor are wasted.
For the connection mode (see fig. 4) that each drawer in the existing low-voltage drawer type switch cabinet is connected with the main bus of the power distribution cabinet through an extrusion type spring contact, two metal contacts on the drawer are fixedly connected through the extrusion type spring, and the drawer enables the two metal contacts to be in extrusion type contact with the main bus of the power distribution cabinet through pushing so as to switch on a main loop and a control loop. The utility model with the number of CN 207124368U discloses a drawer type switch cabinet wiring structure, which discloses a closer technical scheme. The original low-voltage drawer type switch cabinet is also the wiring structure.
In the low-voltage drawer type switch cabinet, the contact of the extrusion type spring and the main bus of the power distribution cabinet belong to a movable connection mode, and the extrusion type spring and the main bus of the power distribution cabinet are easy to loosen due to long-time use, so that the contact has potential safety hazards of heating and even melting; also, the safety hazard exists when the low-voltage drawer type switch cabinet is loaded with a large load or has an excessively long running time. In case of a fault, the drawer has small space and is internally provided with various components, so that maintenance personnel cannot get off the drawer easily, the whole maintenance is time-consuming and labor-consuming, and the stable operation of the load electrical equipment in the whole chemical workshop is seriously influenced. In order to meet the requirement of chemical process production and ensure the stability of the operation and the reliability of control of electrical equipment, the high-capacity low-voltage drawer type switch cabinet in a substation needs to be updated and modified urgently.
SUMMERY OF THE UTILITY MODEL
For solving the potential safety hazard that current low pressure drawer type cubical switchboard exists because the contact of extrusion formula spring and the main bus swing joint mode of switch board exist in the transformer substation of my enterprise, on the basis that does not change original low pressure drawer type cubical switchboard major structure and major loop and control circuit connected mode, we only reform transform drawer and switch board main bus connected mode, it is reliable to reform transform to make the connection contact between each components and parts, can not take place overheated phenomenon, for the easy trouble in fortune dimension personnel later stage simultaneously seeks and maintains. Therefore, the safe wiring structure of the low-voltage drawer type switch cabinet is designed and provided.
In order to achieve the technical purpose, the utility model adopts the following technical scheme: the utility model provides a safe wiring structure of low pressure drawer type switch cabinet, the cartridge has a plurality of drawers including the distribution cabinet body and on the front of the distribution cabinet body the upset is provided with the backplate on the back of the distribution cabinet body, and its main transformation scheme lies in: the utility model discloses a high-voltage switchgear, including the distribution cabinet body, the internal mounting of distribution cabinet has the insulation board, towards install main circuit breaker, a plurality of branch circuit breakers and correspond every respectively from last to down on the insulation board of backplate one side the ac contactor that branch circuit breaker was equipped with, the main bus on the distribution cabinet body with main circuit breaker's input passes through the cable and connects, main circuit breaker's output passes through the cable and every branch circuit breaker's input is connected, and every branch circuit breaker's output is connected and forms a major loop with ac contactor's input through the cable, every ac contactor's output passes through cable connection electrothermal relay and is connected with load motor, every electrothermal relay installs on the insulation board and be located and correspond the ac contactor below in major loop.
As a further supplementary description of the above technical solution, a current transformer is disposed on each main loop, the current transformer is disposed on a cable between the breaker and the ac contactor, and the current transformer is electrically connected to an ammeter, and is configured to detect a current value on each main loop and display the current value through the ammeter, so as to determine whether a fault exists in the main loop.
As a further limitation of the above technical solution, each of the ammeters is installed on a drawer corresponding to the main loop.
As a further limitation of the above technical solution, the rated current value of the main breaker is greater than the sum of the rated current values of all the open breakers.
As a further limitation of the above technical solution, a rated current value of the ac contactor is greater than a rated current value of a load in a main circuit where the ac contactor is located.
As the technical scheme is further limited, the connection terminals of the control loop are arranged on the insulating plate below all the thermal relays.
Compare with the connected mode of low pressure drawer type switch cabinet before not reforming transform, the utility model discloses a wiring structural mode has following advantage: 1. the utility model discloses replace the contact of extrusion formula spring and the extrusion contact wiring connected mode of main bus-bar in the original low pressure drawer type switch cabinet by fixed connection mode, solve the firm and problem that leads to the contact to generate heat and melt even with this, specifically be the circuit breaker of connecting in every drawer, components and parts such as alternating current contact migrate out and install on the great insulation board in distribution cabinet body space, its main bus-bar passes through the disconnected circuit ware of original each drawer major loop of main circuit connection of main circuit breaker, ac contactor, then be connected with place motor through reconnection thermal relay. 2. The utility model discloses install all components and parts of major loop in every drawer on the great insulation board in distribution cabinet body back space in unison to make all components and parts of every major loop distribute on same vertical, can patrol and examine each components and parts when the load operation, in time discover the trouble, avoid the accident to enlarge, more be favorable to the personnel trouble of later stage maintenance to seek and maintain. 3. The utility model discloses because the distribution cabinet body will be a lot more than in the former drawer behind one's back, when changing spare parts or handling failure, can directly dismantle the trouble component, need not dismantle other normal components and parts. 4. The utility model discloses be equipped with current transformer on every major loop to be connected with the ampere meter on the original drawer, whether there is the trouble in the major loop of place can be judged through the reading on the ampere meter, can effectively shorten the trouble-shooting time. 5. The utility model discloses on the great insulation board in distribution cabinet body back space was reequiped to control circuit's binding post, the personnel's fault maintenance of convenient later stage maintenance is then to the repacking mode like this.
Drawings
The following drawings are provided to further explain the technical solutions of the present invention, so as to enable those skilled in the art to better understand the technical solutions, and do not constitute limitations of the technical solutions.
Fig. 1 is a front view of the middle and low voltage drawer type switch cabinet of the present invention before and after transformation;
fig. 2 is a back front view of the modified middle and low voltage drawer type switch cabinet of the present invention;
fig. 3 is a circuit wiring schematic diagram of the middle and low voltage drawer type switch cabinet of the present invention;
fig. 4 is a schematic view of the connection structure between the extrusion type spring contact and the main bus of the drawer before the transformation of the middle and low voltage drawer type switch cabinet.
Wherein: the power distribution cabinet comprises a power distribution cabinet body 1, a drawer 2, an ammeter 3, a back plate 4, an insulating plate 5, a main circuit breaker 6, a breaker 7, an alternating current contactor 8, a thermal relay 9, a current transformer 10, a contact 11, an extrusion type spring 12 and a main bus 13.
Detailed Description
In order to further explain the technical scheme of the utility model, understand in detail the utility model discloses there is essential difference in the components and parts connected mode of technical scheme that takes and original low pressure drawer type switch cabinet mode of connection, it is right to the embodiment of many 380v three-phase motor control modes to combine below 1 to 3 the utility model discloses further explain, certainly can not understand the utility model discloses can implement the injecing of scope.
As shown in fig. 1 to 3, a safe wiring structure of a low-voltage drawer type switch cabinet comprises a distribution cabinet body 1, a plurality of drawers 2 are inserted into the front of the distribution cabinet body 1, an ammeter 3 is installed on each drawer 2, a back plate 4 is arranged on the back of the distribution cabinet body 1 in an overturning manner, a contact 11 and a compression spring 12 on each drawer 2 are firstly detached on the premise that the main structure is not changed, an insulating plate 5 is installed inside the distribution cabinet body 1, a main breaker 6, a plurality of breaker devices 7, an alternating current contactor 8 and a thermal relay 9 which are corresponding to each breaker device 7 are respectively installed on the insulating plate 5 facing one side of the back plate 4 from top to bottom, and a wiring terminal of a control loop is installed on the insulating plate 5 below the thermal relay 9 and used for installing components on the control loop.
Referring to fig. 3, the main power main bus 13 is a power distribution cabinet three-phase bus U, V, W connected to an incoming line side connection end U, V, W of a main circuit breaker 6 through a cable, the main circuit connection line is a connection line of an outgoing line side U, V, W of the main circuit breaker 6 connected to an incoming line side connection end U, V, W of each circuit breaker 7 through a cable, an outgoing line side connection end U, V, W of each circuit breaker 7 is connected to an incoming line side connection end U, V, W of an ac contactor 8 through a cable, an outgoing line side connection end U, V, W of the ac contactor 8 is connected to an incoming line side connection end U, V, W of a thermal relay 9 through a cable, and an outgoing line side connection end U, V, W of the thermal relay 9 is connected to a motor terminal U, V, W on site through a cable, and the connections form a multi-path main circuit. The rated current value of the main circuit breaker 6 is larger than the sum of the rated current values of all the breaking circuit breakers 7, and the rated current value of the alternating current contactor 8 is larger than the rated current value of the load in the corresponding main circuit.
Further, a current transformer 10 electrically connected with the ammeter 3 is arranged on each main loop, wherein the current transformer 10 is arranged on a cable between the breaker 7 and the ac contactor 8, and certainly not limited to any phase cable, and the current transformer 10 is used for detecting a current value on each main loop and displaying the current value through the ammeter 3, so as to determine whether a fault exists in the main loop.
In the above embodiment, the following types of components, main breaker types, are preferred in the main circuit: NZM10-630S, circuit breaker model: CM1-160M/3300, contactor model: 3TF 51. The overall requirement is that all components in each main loop are selected to be in accordance with the specification and model of the load.
Through the transformation, the transformed low-voltage drawer type switch cabinet keeps the drawer on the power distribution cabinet body, and the indicating lamp and the protection device on the drawer can work normally, so that the attractiveness of the power distribution cabinet is ensured. After the implementation, the connection and the contact between the components are reliable, the overheating phenomenon cannot occur, the main loop and the control loop are clear at a glance, and the fault finding and the maintenance of operation and maintenance personnel in the later period are greatly facilitated.
The main features and advantages of the present invention have been shown and described, and it will be obvious to those skilled in the art that the embodiments of the present invention are not limited to the details of the above exemplary embodiments, and that the inventive idea and design idea can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention, and the same shall belong to the protection scope of the present invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Furthermore, it should be understood that although the present specification describes embodiments, not every embodiment includes only a single embodiment, and such description is for clarity purposes only, and it is to be understood that all embodiments may be combined as appropriate by one of ordinary skill in the art to form other embodiments as will be apparent to those of skill in the art from the description herein.
Claims (6)
1. The utility model provides a safe wiring structure of low pressure drawer type cubical switchboard, including the distribution cabinet body (1) and the cartridge has a plurality of drawers (2) on the front of the distribution cabinet body (1) the upset is provided with backplate (4), its characterized in that on the back of the distribution cabinet body (1): the utility model provides a high-voltage switchgear assembly, including the switch board body, the internally mounted of the switch board body (1) has insulation board (5), towards on insulation board (5) of backplate (4) one side from last to installing respectively down main circuit breaker (6), a plurality of circuit breaker (7) and corresponding every ac contactor (8) that circuit breaker (7) were equipped with, main generating line (13) on the switch board body (1) with the input of main circuit breaker (6) passes through the cable and connects, the output of main circuit breaker (6) pass through the cable and every the input of circuit breaker (7) is connected, and every the output of circuit breaker (7) is connected and forms a major loop through the cable with ac contactor (8)'s input, every the output of ac contactor (8) connects thermal relay (9) and is connected with the load motor through the cable, every thermal relay (9) are installed on insulation board (5) and be located and correspond ac contactor (8) below the major loop.
2. The safety wiring structure of low-voltage drawer type switch cabinet as claimed in claim 1, wherein: and a current transformer (10) is arranged on each main loop, the current transformer (10) is arranged on a cable between the breaker (7) and the alternating current contactor (8), and the current transformers (10) are electrically connected with the ammeter (3) and used for detecting current values on each main loop and displaying the current values through the ammeter (3) so as to judge whether the main loop has faults or not.
3. The safe wiring structure of the low-voltage drawer type switch cabinet according to claim 2, wherein: each ammeter (3) is arranged on the drawer (2) corresponding to the main loop.
4. The safety wiring structure of low-voltage drawer type switch cabinet as claimed in any one of claims 1 to 3, wherein: the rated current value of the main breaker (6) is larger than the sum of the rated current values of all the breaking breakers (7).
5. The safety wiring structure of low-voltage drawer type switch cabinet as claimed in claim 4, wherein: and the rated current value of the alternating current contactor (8) is greater than the rated current value of the load in the corresponding main loop.
6. The safety wiring structure of low-voltage drawer type switch cabinet as claimed in claim 5, wherein: and the insulating plates (5) positioned below all the thermal relays (9) are provided with wiring terminals of a control loop.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222529160.8U CN218352001U (en) | 2022-09-23 | 2022-09-23 | Safe wiring structure of low-voltage drawer type switch cabinet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222529160.8U CN218352001U (en) | 2022-09-23 | 2022-09-23 | Safe wiring structure of low-voltage drawer type switch cabinet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218352001U true CN218352001U (en) | 2023-01-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222529160.8U Active CN218352001U (en) | 2022-09-23 | 2022-09-23 | Safe wiring structure of low-voltage drawer type switch cabinet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218352001U (en) |
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- 2022-09-23 CN CN202222529160.8U patent/CN218352001U/en active Active
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