CN209948378U - A high-strength MNS cabinet - Google Patents

Abstract

The utility model discloses a high strength MNS rack, include: the low-voltage switch cabinet unit is divided into a horizontal bus chamber unit, a function chamber unit and a cable chamber unit by a partition board, the function chamber unit comprises a plurality of drawer type basic unit cabinets which are parallel to each other, a mechanical interlocking device is arranged on each basic unit cabinet to enable each basic unit cabinet to be in a plurality of working state positions, each basic unit cabinet comprises an instrument board, an insulating material side plate, a rear plate with a cable wiring terminal and a control wire terminal installation part, the function chamber unit is arranged in the front part inside the low-voltage switch cabinet unit, the horizontal bus chamber unit is arranged inside the low-voltage switch cabinet unit, and the cable chamber unit is arranged inside the low-voltage switch cabinet unit. Through the mode, more functional units can be accommodated in a smaller space, the structure is compact, the fault arc resistance performance is realized, the operation and maintenance are safe and reliable, the user can randomly select and use the equipment according to the requirement, the generalization and standardization degree is high, and the assembly is convenient.

Description

A high-strength MNS cabinet

technical field

The utility model relates to the technical field of electric control, in particular to a high-strength MNS cabinet.

Background technique

MNS series switchgear is a combined low-voltage switchgear assembled with standard modules, suitable for power supply systems with AC 50Hz or 60Hz, rated working voltage of 660V and below, and can be used in power plants, substations, industrial and mining enterprises, building hotels , airports, docks, radio and television and other communication centers are used as the control of power generation, transmission and distribution, power conversion and power consumption equipment, and reactive power compensation is performed on the main busbar through the capacitor compensation cabinet.

Utility model content

The main technical problem solved by the utility model is to provide a high-strength MNS cabinet.

In order to solve the above-mentioned technical problem, a technical scheme that the utility model adopts is:

A high-strength MNS cabinet is provided, comprising: a plurality of low-voltage switchgear units connected in combination, the low-voltage switchgear unit including a cabinet frame, a door panel, a side panel, a clapboard, and a mounting bracket assembled by C-shaped steel, the low-voltage switchgear unit The switchgear unit is divided into horizontal busbar room unit, function room unit, and cable room unit through partitions. The function room unit includes a plurality of drawer-type basic unit cabinets that are parallel to each other. Working position, experimental position, opening position, extraction position and isolation position, the basic unit cabinet includes instrument panel, insulating material side panel, rear panel with cable connection terminals and control wire terminal mounting pieces, and the functional room unit is set in the low voltage The front part inside the switchgear unit, the horizontal busbar room unit is arranged at the rear or the top inside the low voltage switchgear unit, and the cable room unit is arranged at the side part or the rear part inside the low voltage switchgear unit.

In a preferred embodiment of the present invention, the surface of the cabinet frame is provided with an aluminum-zinc plated layer.

In a preferred embodiment of the present invention, the material of the separator is steel plate or flame-retardant plastic.

In a preferred embodiment of the present invention, a metal plate with ventilation holes is used to isolate the adjacent upper and lower basic unit cabinets.

In a preferred embodiment of the present invention, the basic unit cabinet includes a PC cabinet, an MCC cabinet, a PC and MCC mixed cabinet, and a reactive power compensation cabinet.

In a preferred embodiment of the present invention, the PC cabinet includes a frame-type circuit breaker or a knife fuse switch.

In a preferred embodiment of the present invention, the MCC cabinet includes a plastic case switch, a contactor, a thermal relay or a knife fuse switch.

In a preferred embodiment of the present invention, the low-voltage power capacitor and its corresponding control loop.

In a preferred embodiment of the present invention, the height of the basic unit cabinet is 8E/4, 8E/2, 8E, 12E, 16E, 20E or 24E.

In a preferred embodiment of the present invention, a mechanical interlocking device is arranged between the basic unit cabinet and its circuit breaker, and when the circuit breaker is disconnected, the basic unit cabinet can be pulled out or inserted.

The beneficial effects of the utility model are as follows: a high-strength MNS cabinet is provided, which can accommodate more functional units in a smaller space, and the C-shaped profiles with E as the modulus can meet various structural forms, and the structure is compact and easy to use. High-strength flame-retardant, high-insulation-strength plastic functional board protection, with anti-fault arc performance, safe and reliable operation and maintenance, protection level and use environment requirements, strong structural versatility, flexible assembly, using standard module design, respectively It is composed of standard units such as protection, operation, conversion, control, adjustment, and indication. Users can choose and assemble according to their needs. It is universal and standardized, easy to assemble, has reliable quality assurance, and does not require special complexity.

Description of drawings

In order to illustrate the technical solutions in the embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings used in the description of the embodiments. Obviously, the drawings in the following description are only some implementations of the present invention. For example, for those of ordinary skill in the art, under the premise of no creative work, other drawings can also be obtained from these drawings, wherein:

1 is a structural front view of a preferred embodiment of a high-strength MNS cabinet of the present invention;

FIG. 2 is a rear view of the structure of a preferred embodiment of the high-strength MNS cabinet of the present invention.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

Please refer to Fig. 1-2, the utility model embodiment includes:

A high-strength MNS cabinet includes a plurality of low-voltage switchgear units 100, which can be combined and connected according to actual needs. Mounting bracket 5, all structural parts of cabinet frame 1 are treated with aluminum and zinc, and are firmly connected to basic cabinet frame 1 by self-tapping locking screws or grade 8.8 hexagon bolts, plus door panels 2, side panels 3, Parts such as partition plate 4, mounting bracket 5 and busbar functional unit are assembled into a complete MNS cabinet, and the modular installation is carried out. After chemical treatment, it is electrostatically sprayed, resistant to wear and corrosion, with strong mechanical strength and reliable grounding continuity.

The internal dimensions, component dimensions, and compartment dimensions of the MNS cabinet are all changed in accordance with the modularization E=25mm.

Each low-voltage switchgear unit 100 of the MNS cabinet is divided into three compartments, namely the horizontal busbar compartment unit 10, the functional compartment unit 20, and the cable compartment unit 30, which are separated from each other by steel plates or high-strength flame-retardant plastic functional plates to ensure For safe use and to prevent the spread of accidents, the functional room unit 20 includes a plurality of drawer-type basic unit cabinets 21 that are parallel to each other, and the upper and lower drawers are separated by metal plates with ventilation holes to effectively prevent arcing or Accidents caused by short circuits between busbars and other lines.

The functional room unit 20 is arranged at the front of the low-voltage switchgear unit 100. According to actual needs, the cable room unit 30 is arranged at the side or rear of the low-voltage switchgear unit 100. The horizontal busbar room unit 10 is arranged at the rear of the low-voltage switchgear unit 100 . In the case of adopting the rear entry and exit lines, the horizontal busbar room unit 10 is arranged at the top of the low-voltage switchgear unit 100 .

The functional room unit 20 includes a plurality of drawer-type basic unit cabinets 21 parallel to each other, with two forms of side outlet and rear outlet. According to actual requirements, the cable room unit 30 of the side outlet switch cabinet is on the side of the MNS cabinet, and the horizontal busbar room unit 10 is arranged at the rear of the MNS cabinet; or the cable room unit 30 is designed at the rear of the MNS cabinet, and the horizontal bus room unit 10 is arranged at the top of the MNS cabinet.

The horizontal busbar compartment includes busbars connecting one or more distribution busbars and/or incoming and outgoing units. Preferably, the horizontal busbars are installed in an independent busbar compartment behind the cabinet. It has two optional installation positions, namely the cabinet. One-third or two-thirds of the height of the cabinet, the busbar can be installed in the upper or lower part as required, or two groups of upper and lower groups can be installed at the same time. The two groups of busbars can be used alone or in parallel. Each phase busbar consists of two Or 8 busbars in parallel.

It is also possible to configure one or two sets of horizontal busbars according to the requirements, both of which can be powered independently or in parallel, or one group is used as a working busbar, and the other group is used as a backup busbar.

The basic unit cabinet 21 includes PC cabinet, MCC cabinet, PC and MCC mixed cabinet, reactive power compensation cabinet, PC cabinet includes frame circuit breaker or large-capacity knife fuse switch, generally used for incoming switch cabinet and high-current power distribution Outlet cabinets; MCC cabinets include molded case switches, contactors, thermal relays or small-capacity knife fuse switches, generally used in motor control centers or small current distribution centers; PC and MCC mixed cabinets include part of the PC circuit, part of the The MCC circuit adopts a mixed structure, which can improve the installation efficiency of the original cabinet and reduce the number of switch cabinets; the reactive power compensation cabinet includes low-voltage power capacitors and their corresponding control circuits, which are used for low-voltage reactive power compensation of the system.

The height of the basic unit cabinet 21 is 8E/4, 8E/2, 8E, 12E, 16E, 20E or 24E, which can be designed with a modular structure. The effective component installation height is 1800mm, which makes the overall layout of the cabinet more reasonable and more beautiful.

The operation of the basic unit cabinet 21 is realized by the switch of the handle 22 mounted on the instrument panel. The handle 22 has five positions, and each position is designed to be interlocked by electrical and mechanical. By turning the handle 22, the basic unit cabinet 21 can be operated. Corresponding operations are performed to prevent the switch from being pulled under load when the switch is energized, which improves its safety, and the basic unit cabinets 21 of the same specification can be easily interchanged.

The basic unit cabinet 21 has a working position: the main switch is closed, the control circuit is turned on, and the drawer is locked; the opening position: the main switch is turned off, the control circuit is turned on, and the drawer is locked; test position: the main switch is turned off, and the control circuit is turned on , the drawer is locked; pull-out position: both the main circuit and the control circuit are disconnected, the drawer can be plugged and unplugged; isolation position: pull out a distance of 30mm, the main circuit and the control circuit are disconnected, the isolation is completed, and the drawer is locked.

Preferably, the handle 22 articulated on the door panel 2 is connected to the connecting rod, the connecting rod is installed on the circuit breaker, the middle of the connecting rod is engaged with the swing plate, the lower part of the swing plate corresponds to the pin, the spring on the pin sleeve is inserted into the sleeve, and the bolt Fix the shaft sleeve on the curved plate, the curved plate is fixed on the left side plate 3 and the right side plate 3, there is a boss on the pin that presses on the spring, and the lower end of the pin is aligned with the small hole of the support plate on the switch cabinet. , the structure is simple, safe and reliable, and the drawer exchange is flexible and so on.

The basic unit cabinet 21 includes two-layer isolation plugs, which can be used to draw control signals from the outside of the control circuit. Generally, there are 16-32 secondary isolation plugs, and each lead-out list can be connected to two 1.5-2.5mm ² multi-strand flexible wires .

The beneficial effects of the high-strength MNS cabinet of the utility model are as follows: a high-strength MNS cabinet is provided, which can accommodate more functional units in a small space, and the C-shaped profile with E as the modulus can meet various structural forms, Compact structure, protected by high-strength flame-retardant, high-insulation-strength plastic functional board, with anti-fault arc performance, safe and reliable operation and maintenance, protection level and use environment requirements, strong structural versatility, flexible assembly, using standard modules Design, can be composed of standard units such as protection, operation, conversion, control, adjustment, indication, etc., users can choose and assemble according to their needs, generalization, high degree of standardization, convenient assembly, reliable quality assurance, no special complexity is required.

The above descriptions are only the embodiments of the present invention, and are not intended to limit the scope of the patent of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the description of the present invention, or directly or indirectly applied to other related technologies Fields are similarly included in the scope of patent protection of the present invention.

Claims (10)

1. A high strength MNS cabinet, comprising: a plurality of low-voltage switch cabinet units which are combined and connected, wherein each low-voltage switch cabinet unit comprises a cabinet frame, a door plate, a side plate, a partition plate and a mounting bracket which are assembled by C-shaped steel, the low-voltage switch cabinet unit is internally divided into a horizontal bus chamber unit, a function chamber unit and a cable chamber unit through a partition plate, the function chamber unit comprises a plurality of drawer type basic unit cabinets which are parallel to each other, a mechanical interlocking device is arranged on each basic unit cabinet to enable each basic unit cabinet to be located at a working position, an experiment position, a brake separating position, a withdrawing position and an isolating position, each basic unit cabinet comprises an instrument panel, an insulating material side plate, a rear plate with a cable wiring terminal and a control wire terminal installing part, the function chamber unit is arranged at the front part inside the low-voltage switch cabinet unit, the horizontal bus chamber unit is arranged at the rear part or the top part inside the low-voltage switch cabinet unit, and the cable chamber unit is arranged at the side part or the rear part inside the.

2. The high strength MNS cabinet as claimed in claim 1, wherein the surface of said frame is provided with an aluminum-zinc plated layer.

3. The high strength MNS cabinet as claimed in claim 1, wherein the partition is made of steel plate or flame retardant plastic.

4. The high strength MNS cabinet as claimed in claim 1, wherein adjacent upper and lower layers of said base unit cabinets are separated by a metal plate with ventilation holes.

5. The high strength MNS cabinet as claimed in claim 1, wherein said base unit cabinets include PC cabinets, MCC cabinets, PC and MCC mixed cabinets, reactive power compensation cabinets.

6. The high strength MNS cabinet as recited in claim 5, wherein the PC cabinet comprises a frame circuit breaker or a knife switch.

7. The high strength MNS cabinet as claimed in claim 5, wherein the MCC cabinet comprises a molded case switch, a contactor, a thermal relay, or a knife-fuse switch.

8. The high strength MNS cabinet as claimed in claim 5, further comprising low voltage power capacitors and their respective control loops.

9. The high strength MNS cabinet as claimed in claim 1, wherein the height of said base unit cabinet is 8E/4, 8E/2, 8E, 12E, 16E, 20E or 24E.

10. A high strength MNS cabinet as claimed in claim 1, wherein a mechanical interlocking device is provided between the basic unit cabinet and its circuit breaker, enabling the basic unit cabinet to be extracted or inserted when the circuit breaker is in the breaking state.

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