CN215732696U - Low-voltage cabinet earthing switch locking system - Google Patents

Abstract

The utility model discloses a locking system of a grounding switch of a low-voltage cabinet, which comprises a cabinet body, wherein an electromagnetic lock is installed on a back door of the cabinet body, an inner cavity of the cabinet body comprises a bus chamber, a breaker chamber and a cable chamber, a main bus is arranged in the bus chamber, a breaker is arranged in the breaker chamber, a grounding switch is arranged in the cable chamber, a wire outlet end of the breaker is connected with a wire inlet end of the breaker or a wire inlet end of the grounding switch through a toggle switch, a wire outlet end of the grounding switch is grounded, and the electromagnetic lock is connected in series between the wire inlet end of the grounding switch and the wire outlet end of the grounding switch. According to the utility model, the electromagnetic lock is arranged on the rear door of the cabinet body, the grounding switch is arranged in the cable chamber, the grounding switch is switched off, the electromagnetic lock cannot be powered on, the rear door cannot be opened, the grounding switch is switched on, the electromagnetic lock is powered on, the rear door is opened, and the maintenance personnel can carry out maintenance, so that the safety of the maintenance personnel is guaranteed, the structure is compact, the operation is flexible, and the use and maintenance are safe and reliable.

Description

Low-voltage cabinet earthing switch locking system

Technical Field

The utility model belongs to the technical field of low-voltage switch cabinets, and particularly belongs to a locking system of a grounding switch of a low-voltage cabinet.

Background

At present, manufacturing enterprise and power supply management all will use a large amount of high-low-voltage cabinet, the low-voltage cabinet is applicable to trades such as power plant, petroleum, chemical industry and metallurgy, in the low-voltage cabinet working process, operating personnel can open the back door at any time and observe the behavior of electrical components, opening the cabinet door after, the staff just can the direct touch switch spare, and if the back door is opened, earthing switch still is in the state of breaking then can endanger operating personnel's personal safety, present low-voltage cabinet has very big potential safety hazard.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems in the prior art, the utility model provides a locking system for a grounding switch of a low-voltage cabinet, which solves the problems that the grounding switch can still be operated after the rear cabinet door of the low-voltage cabinet is opened, and the potential safety hazard is large.

In order to achieve the purpose, the utility model provides the following technical scheme: the utility model provides a low-voltage cabinet earthing switch locking system, includes the cabinet body, install the electromagnetic lock on the back door of the cabinet body, the inner chamber of the cabinet body includes bus-bar room, circuit breaker room and cable chamber, be provided with the main bus in the bus-bar room, the indoor circuit breaker that is provided with of circuit breaker, the indoor earthing switch that is provided with of cable, the inlet wire end of circuit breaker or earthing switch's inlet wire end is connected through toggle switch to the leading-out terminal of circuit breaker, earthing switch's leading-out terminal ground connection, it has the electromagnetic lock to establish ties between earthing switch's inlet wire end and earthing switch's the leading-out terminal.

Furthermore, a current transformer is further installed in the cable chamber, the outlet end of the circuit breaker is also connected with the inlet end of the current transformer through a lower support bus, and the inlet end of the current transformer is connected to the main bus.

Further, still include the instrument room, install comprehensive protector in the instrument room.

Further, the circuit breaker adopts a Schneider MT series drawer type circuit breaker.

Furthermore, the bus clamping plate in the bus chamber is made of epoxy resin.

Further, the grounding switch is a disconnecting switch of OT2500E 03P.

Furthermore, the cabinet body is made of aluminum-zinc coated steel plates.

Furthermore, the front door of the cabinet body adopts an asymmetric double-door structure, and the rear door adopts a symmetric double-door structure.

Compared with the prior art, the utility model has at least the following beneficial effects:

the utility model provides a locking system of a grounding switch of a low-voltage cabinet, which is characterized in that an electromagnetic lock is arranged on a back door of a cabinet body, the grounding switch is arranged in a cable chamber, so that a wire outlet end of a circuit breaker is connected with a wire inlet end of the circuit breaker or the wire inlet end of the grounding switch, the electromagnetic lock is connected between the wire inlet end and the wire outlet end of the grounding switch in series, the electromagnetic lock and the grounding switch form an electric locking structure to realize locking of the back door, when the grounding switch is in a brake separating position, the electromagnetic lock cannot be powered on, the back door cannot be opened, when the grounding switch is in a brake closing position, the electromagnetic lock is powered on, the back door is opened, and an inspector can carry out maintenance, after the grounding switch is closed, the electromagnetic lock and the grounding switch are arranged in the low-voltage switch cabinet, the back door can be opened, so that the safety of the inspector is forgotten, and the phenomenon that the inspector can work with electricity because of misoperation or the grounding switch closing can not occur, the utility model has compact structure, flexible operation and safe and reliable use and maintenance.

Furthermore, the comprehensive protector is arranged in the instrument room, so that the safety and the reliability of the equipment during working can be ensured.

Furthermore, the circuit breaker adopts a Schneider MT series drawer type circuit breaker, the drawout circuit breaker is safe and reliable, the space is saved, the intelligent release can realize four-section protection, and the circuit breaker has four-remote function, is modularized and is more convenient to debug and maintain.

Furthermore, the bus clamping plate is made of epoxy resin, so that the insulating property is effectively enhanced, the safe insulating distance is better ensured, and meanwhile, the bus clamping plate is good in heat resistance and high in short circuit tolerance strength.

Furthermore, the grounding switch in the utility model adopts an isolating switch with the model number OT2500E03P, when the grounding switch is switched on, the rear door can be opened, the grounding switch with the model number can meet the operation requirement of the low-voltage cabinet, and a connecting rod structure of the grounding switch with the model number can also be passed through, after the rear door is opened, the connecting rod mechanism is mechanically locked with the rear door, the grounding switch is prevented from being switched off by misoperation after the rear door is opened, and only after the rear door is closed, the connecting rod can be separated from the rear door, so that the low-voltage cabinet provided by the utility model meets the condition that the grounding switch is switched on, the rear door can be opened, the rear door is closed, the grounding switch can be switched off, the operation of the grounding switch is safer and more reliable, and the overhaul of the low-voltage cabinet reaches the maximum safe index.

Furthermore, the cabinet body of the low-voltage cabinet adopts an aluminum-zinc coated steel plate, so that the protection grade of the outer shell of the low-voltage cabinet can meet IP4X, and the protection grade between the inner compartments of the low-voltage cabinet can meet IP 2X.

Furthermore, the cabinet body of the utility model adopts an asymmetric double-door structure, and the rear door adopts a symmetric double-door structure, thereby solving the problem of protection of direct contact and improving the integral aesthetic property.

Drawings

FIG. 1 is a schematic structural view of the interior of the cabinet of the present invention;

FIG. 2 is a rear view of the structure of FIG. 1;

FIG. 3 is a schematic view of the electrical lockout of the present invention;

in the drawings: 1-cabinet body, 2-circuit breaker, 3-upper supporting bus, 4-grounding switch, 5-current transformer, 6-bus clamping plate, 7-comprehensive protector, 8-main bus, 9-grounding bus and 10-electromagnetic lock;

a is a bus chamber, B is a breaker chamber, C is a cable chamber, and D is an instrument chamber.

Detailed Description

The utility model is further described with reference to the following figures and detailed description.

As shown in fig. 1 and 2, the utility model provides a locking system for a low-voltage cabinet grounding switch, which comprises a cabinet body 1, wherein an electromagnetic lock 10 is installed on a rear door of the cabinet body 1, a bus chamber a, a breaker chamber B, a cable chamber C and an instrument chamber D are arranged in an inner cavity of the cabinet body 1, a main bus 8 and a bus clamping plate 6 are arranged in the bus chamber a, a breaker 2 is arranged in the breaker chamber B, a grounding switch 4 and a current transformer 5 are arranged in the cable chamber C, a comprehensive protector 7 is installed in the instrument chamber D, and a grounding bus 9 is installed on the outer surface of the inner cavity of the cabinet body 1 and positioned at the bottom of the cabinet body 1.

Specifically, as shown in fig. 3, the upper supporting bus 3 is connected to an incoming line end of the circuit breaker 2, an outgoing line end of the circuit breaker 2 is connected to the current transformer 5 through the lower supporting bus, wherein a toggle switch is disposed on the outgoing line end of the circuit breaker 2, one end of the toggle switch is directly connected to the lower supporting bus, the toggle switch toggles and connects the incoming line end of the circuit breaker 2 or the incoming line end of the grounding switch 4, the outgoing line end of the wiring switch 4 is grounded, an electromagnetic lock 10 is connected in series between the incoming line end of the grounding switch 4 and the outgoing line end of the grounding switch 4, the outgoing line end of the current transformer 5 is connected to the main bus 8, the grounding switch 4 is further connected to the main bus 8, therefore, the utility model installs the grounding switch 4 and the electromagnetic lock 10 in the low-voltage cabinet to form an electrical locking structure of the low-voltage cabinet, and realizes that the electromagnetic lock 10 can be powered on only when the grounding switch is switched on, the back door is opened, and the purpose of safe maintenance of the maintainer is achieved, when earthing switch 4 separating brake, electromagnetic lock 10 can not the circular telegram, thereby can't open the back door and lock the back door, avoid appearing the maintainer and do not close earthing switch and appear opening the dangerous action that the back door overhauld promptly.

Preferably, the grounding switch 4 in this embodiment is an isolation switch of type OT2500E03P, which meets the use requirements of the low-voltage cabinet, and the isolation switch of this type has a connecting rod structure, and when the back door is opened, the purpose of mechanical locking with the back door is achieved through the connecting rod of the isolation switch of this type, so that the grounding switch 4 cannot be opened after the back door is opened, and the maintenance personnel can prevent others from mistakenly operating to open the grounding switch 4 to electrify the low-voltage cabinet being maintained, thereby endangering the personal safety of the maintenance personnel, the isolation switch of this type and the electric locking provided by the present invention make the maintenance of the low-voltage cabinet of 0.4kV provided by the present invention safer, when the grounding switch 4 is not closed, the electromagnetic lock 10 on the back door cannot be electrified, the back door is locked, the back door cannot be opened, and when the grounding switch 4 is closed, the electromagnetic lock 10 on the back door is electrified, open the back door, the maintainer overhaul can, earthing switch 4 itself link mechanism who takes makes the back and earthing switch 4 reach the dead state of mechanical lock, the state of opening at the back, earthing switch 4 can not the separating brake, ensures the personal safety of maintainer maximize, overhauls the back of finishing, and the back door is closed, but earthing switch 4 side separating brake outage, and electromagnetic lock 10 loses the electricity, locks the dead back door, closes the circuit breaker floodgate, makes the operation of low-voltage equipment.

In this embodiment, the front door of the cabinet body adopts an asymmetric double-door structure, and the rear door adopts a symmetric double-door structure.

In the preferred embodiment of the present embodiment, the circuit breaker 2 is implemented by a schneider MT-series withdrawable circuit breaker, and the bus bar holder 6 is implemented by epoxy resin, so as to effectively enhance the insulating performance.

In the preferred embodiment of this embodiment, cabinet body 1 chooses for use the high-quality aluminum zinc steel sheet that coats, adopts the assembled structure of bending, and panel processes through numerical control equipment to guarantee its material precision, thereby reach cabinet body 1's high accuracy, cabinet body 1 overall dimension is long: width: 1000:1000: 2200; the aluminum-zinc coated steel plate material of the cabinet body 1 and the structural design of the cabinet body enable the protection grade of the shell of the cabinet body 1 to meet IP4X, and the protection grade between the compartments in the cabinet is IP 2X.

The operation sequence of the utility model is as follows:

power failure operation sequence:

1) the circuit breaker 2 is switched off, and the circuit breaker 2 returns to a test position from a working position;

2) and (4) closing the earthing switch 4, opening the back door and carrying out maintenance by the maintainer.

Power transmission operation sequence:

1) closing the rear door;

2) the grounding switch 4 is opened;

3) the circuit breaker 2 swings from the test position to the working position, and performs power transmission closing operation.

In one embodiment of the utility model, the utility model is used for a locking system of a grounding switch of a 0.4kV low-voltage cabinet.

Finally, it should be noted that: the above-mentioned embodiments are only specific embodiments of the present invention, which are used for illustrating the technical solutions of the present invention and not for limiting the same, and the protection scope of the present invention is not limited thereto, although the present invention is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: any person skilled in the art can modify or easily conceive the technical solutions described in the foregoing embodiments or equivalent substitutes for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the embodiments of the present invention, and they should be construed as being included therein. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (8)

1. The utility model provides a low-voltage cabinet earthing switch locking system, a serial communication port, includes the cabinet body (1), install electromagnetic lock (10) on the back door of the cabinet body (1), the inner chamber of the cabinet body (1) includes bus-bar room, circuit breaker room and cable chamber, be provided with main bus (8) in the bus-bar room, be provided with circuit breaker (2) in the circuit breaker room, be provided with earthing switch (4) in the cable chamber, the inlet wire end of circuit breaker (2) or earthing switch (4)'s inlet wire end is connected through toggle switch to the outlet wire end of circuit breaker (2), earthing switch (4)'s outlet wire end ground connection, electromagnetic lock (10) are established ties between earthing switch (4)'s inlet wire end and earthing switch (4)'s outlet wire end.

2. The low-voltage cabinet earthing switch locking system according to claim 1, characterized in that a current transformer (5) is further installed in the cable chamber, the outlet end of the circuit breaker (2) is further connected with the inlet end of the current transformer (5) through a lower support bus, and the inlet end of the current transformer (5) is connected to the main bus (8).

3. A low-voltage cabinet earthing switch locking system according to claim 1, characterized by further comprising an instrument room, in which a comprehensive protector (7) is installed.

4. The low-voltage cabinet earthing switch blocking system according to claim 1, characterized in that, the circuit breaker (2) is implemented as a schneider MT series withdrawable circuit breaker.

5. The locking system of the grounding switch of the low-voltage cabinet as claimed in claim 1, wherein the bus-bar clamping plate (6) in the bus-bar chamber is made of epoxy resin.

6. The low-voltage cabinet grounding switch locking system according to claim 1, characterized in that the grounding switch (4) is a disconnector of type OT2500E 03P.

7. The low-voltage cabinet earthing switch locking system according to claim 1, characterized in that, the cabinet body (1) is made of aluminum-zinc-coated steel plate.

8. The locking system of the grounding switch of the low-voltage cabinet as claimed in claim 1, wherein the front door of the cabinet body (1) adopts an asymmetric double-door structure, and the rear door adopts a symmetric double-door structure.

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