Low-voltage drawer type switch cabinet structure

Abstract

The utility model belongs to the technical field of low-voltage alternating-current power distribution, and particularly discloses a low-voltage drawer type switch cabinet structure. Comprising a cuboid-shaped drawer and a cabinet body, a circuit breaker, a contactor and a motor protection controller are fixed in the drawer, a pair of sliding rails supporting the drawer to slide out are fixed in the cabinet body, matching parts embedded in the sliding rails are arranged on two side vertical faces of the drawer, the first side vertical face is tightly attached to the inner wall of the cabinet body, and the second side vertical face is tightly attached to the outer wall of the cabinet body. Gaps exist between the second side vertical face and the adjacent inner wall of the cabinet body and between the drawer back plate and the adjacent inner wall of the cabinet body and are provided with openings for cables to go in and out, the gaps can provide placing, pulling and inserting spaces for connecting cables and connectors to form a wiring chamber, and the opening in the second side vertical face is located at the end close to the drawer back plate. By arranging the wiring chamber, the equipment and the cable are separately arranged in different spaces, so that the cable is prevented from being crossed and wound in the drawer, the situations of clamping stagnation and electromagnetic wave interference on a communication line in the drawing process are avoided, and the low-voltage distribution cabinet is suitable for being popularized and used in low-voltage distribution projects.

Description

Technical Field

[0001] The utility model belongs to the technical field of low-voltage AC power distribution, and specifically discloses a low-voltage drawer-type switch cabinet structure. Background Art

[0002] In order to improve the informationization and intelligence level of the low-voltage power supply system of power plants, the newly built or renovated power plant projects are currently equipped with a power supply monitoring and management system (ECMS). This system generally communicates with the motor protection controller or intelligent measurement and control device in the low-voltage drawer switch cabinet through the PROFITBUS-DP bus (hereinafter referred to as DP cable) communication network protocol to collect more electrical quantity information in the motor protection controller or intelligent measurement and control device, form a low-voltage power supply data information database, and serve the smart power plant.

[0003] In order to achieve the above communication collection, the plant power monitoring and management system and the drawers of the low-voltage switch cabinet are connected by special DP cables and DP connectors. At present, when assembling the DP cable, the DP cable and DP connector are directly inserted into the drawer to connect with the motor protection control DP interface, and a certain amount of cable margin is reserved. The cable entanglement causes problems such as small maintenance space, poor drawer extraction and electromagnetic interference, which increases the difficulty of operation and maintenance. Utility Model Content

[0004] In order to solve the technical problems listed in the background technology, the utility model provides a low-voltage drawer-type switch cabinet structure. The specific technical solution is as follows:

[0005] A low-voltage drawer-type switch cabinet structure comprises a rectangular drawer and a cabinet body, wherein a circuit breaker, a contactor and a motor protection controller are fixed in the drawer, a pair of slide rails supporting the drawer to slide out are fixed in the cabinet body, and matching parts embedded in the slide rails are arranged on the two side facades of the drawer, wherein the first side facade is close to the inner wall of the cabinet body, and it is characterized in that the second side facade and the drawer back plate both have gaps with the adjacent inner wall of the cabinet body, and both are provided with openings for cables to enter and exit, the gap can provide space for placing and plugging in connecting cables and connectors, forming a wiring room, and the opening on the second side facade is located near one end of the drawer back plate.

[0006] Preferably, the circuit breaker, contactor and motor protection controller are all fixed on the drawer bottom plate, the external wiring port of the contactor faces the opening on the drawer back plate, and the external wiring port of the motor protection controller faces the opening on the second side facade.

[0007] Preferably, the length of the external cable of the motor protection controller should be greater than or equal to the sum of the distance between the back panel opening of the drawer and the adjacent drawer compartment and twice the front-to-back depth of the drawer.

[0008] Preferably, the external wiring board of the motor protection controller is attached to the inner side of the second side facade, and the external wiring port is located in an opening on the second side facade.

[0009] Compared with the prior art, the utility model has the following advantages:

[0010] The utility model provides a low-voltage drawer-type switch cabinet structure in which a wiring room is arranged between the drawer and the cabinet body. By setting up the wiring room, equipment and cables are placed in different spaces, which effectively prevents cables from being cross-entangled in the drawer, avoids electromagnetic waves formed by the higher voltage of the primary circuit from interfering with the communication line, and can prevent the drawer from being stuck due to cable entanglement during withdrawal, making the operation and maintenance process easier. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a schematic diagram of the original state of the low-voltage drawer-type switch cabinet structure in the embodiment of the utility model;

[0012] Figure 2 It is a schematic diagram of the low-voltage drawer-type switch cabinet structure in the withdrawn state in the embodiment of the utility model.

[0013] Among them, 1-switch cabinet frame; 2-switch cabinet drawer; 3-molded case circuit breaker; 4-AC contactor; 5-motor protection controller; 6-cable wiring room at the rear of the switch cabinet; 7-cable wiring room at the side of the switch cabinet; 8-DP communication cable (that is, the DP cable mentioned in the manual); 9-DP communication dedicated female connector; 10-DP communication dedicated male connector. DETAILED DESCRIPTION

[0014] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model is described below in conjunction with the accompanying drawings and specific embodiments. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on this embodiment, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0015] This embodiment provides a low-voltage drawer-type switch cabinet structure. Figure 1 The main equipment inside the drawer of the motor-type switch cabinet is arranged as shown. A switch cabinet drawer 2, a cable connection room 6 at the rear of the switch cabinet and a cable connection room 7 at the side of the switch cabinet are arranged in the switch cabinet frame 1; the switch cabinet drawer 2 is arranged in front of the cable connection room 6 at the rear of the switch cabinet and on the left side of the cable connection room 7 at the side of the switch cabinet.

[0016] The power distribution components, molded case circuit breaker 3 and AC contactor 4, are arranged in the switch cabinet drawer 2 at one side away from the cable connection room 7 on the switch cabinet side, and the molded case circuit breaker 3 and AC contactor 4 are arranged front and back.

[0017] The motor protection controller 5 is arranged in the switch cabinet drawer 2 close to the side of the cable wiring room 7 on the switch cabinet side, and is arranged as close to the drawer back panel as possible in the switch cabinet drawer 2. The DP communication dedicated female connector 9 of the motor protection controller 5 device is facing the opening on the side wall of the switch cabinet drawer 2, and the interface faces the cable wiring room 7 on the switch cabinet side, and is fixed to the side wall of the switch cabinet drawer 2.

[0018] The DP communication dedicated male connector 10 is connected to the DP communication cable 8 and is plugged and unpluggedly connected to the DP communication dedicated female connector 9 provided with the motor protection controller 5 device in the space of the cable connection room 7 on the switch cabinet side.

[0019] The DP communication cable 8 is connected to the DP communication dedicated male connector 10 of the upper or lower drawer in the switch cabinet frame 1 in the cable connection room 7 on the switch cabinet side. The length of the DP communication cable 8 should be greater than or equal to the distance between the drawer on this layer and the upper and lower drawers plus twice the front-to-back longitudinal depth of the switch cabinet drawer 2 to ensure that it does not affect the pulling out or pushing in of the switch cabinet drawer.

[0020] When the switch cabinet drawer 2 is Figure 2 As shown, when the DP communication cable 8, the DP communication dedicated female connector 9, and the DP communication dedicated male connector 10 are pulled out from the pushed-in state, they move forward and backward along with the switch cabinet drawer 2. At this time, the switch cabinet drawer 2 can be easily inspected and repaired.

[0021] If the switch cabinet drawer 2 needs to be completely pulled out and separated from the switch cabinet frame 1, it is only necessary to open the front door of the cable connection room 7 on the switch cabinet side, and unplug the DP communication dedicated male connector 10 from the DP communication dedicated female connector 9 provided with the motor protection controller 5 device, and the switch cabinet drawer 2 can be completely pulled out without obstruction.

[0022] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions described in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A low-voltage drawer-type switch cabinet structure, comprising a rectangular drawer and a cabinet, wherein a circuit breaker, a contactor and a motor protection controller are fixed in the drawer, a pair of slide rails supporting the drawer to slide out are fixed in the cabinet, and matching pieces embedded in the slide rails are arranged on the two side elevations of the drawer, wherein the first side elevation is close to the inner wall of the cabinet, characterized in that: There is a gap between the second side facade and the drawer back panel and the adjacent inner wall of the cabinet, and both are provided with openings for cables to enter and exit. The gap can provide space for placing and plugging in connecting cables and connectors, forming a wiring room. The opening on the second side facade is located near one end of the drawer back panel.

2. A low-voltage drawer-type switch cabinet structure according to claim 1, characterized in that: The circuit breaker, contactor and motor protection controller are all fixed on the drawer bottom plate, the external connection port of the contactor faces the opening on the drawer back plate, and the external connection port of the motor protection controller faces the opening on the second side elevation.

3. A low-voltage drawer-type switch cabinet structure according to claim 2, characterized in that: The length of the external cable of the motor protection controller should be greater than or equal to the sum of the distance between the back panel opening of the drawer and the adjacent drawer grid and twice the front-to-back depth of the drawer.

4. A low-voltage drawer-type switch cabinet structure as claimed in claim 3, characterized in that: The external wiring board of the motor protection controller is attached to the inner side of the second side elevation, and the external wiring port is located in the opening on the second side elevation.

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