CN215343471U

CN215343471U - Boundary breaker switch cabinet

Info

Publication number: CN215343471U
Application number: CN202121658482.1U
Authority: CN
Inventors: 曾锦河; 曾庆超
Original assignee: Guangdong Purlux Electric Co ltd
Current assignee: Guangdong Purlux Electric Co ltd
Priority date: 2021-07-21
Filing date: 2021-07-21
Publication date: 2021-12-28
Anticipated expiration: 2031-07-21

Abstract

The utility model relates to the field of power distribution networks, in particular to a boundary breaker switch cabinet which comprises a vertical cabinet body, wherein a vacuum circuit breaking unit, a detection control unit, a microcomputer relay protection device, a PT unit and a GPRS communication module are arranged in the cabinet body, the detection control unit comprises a control module, a communication module, a monitoring module and a display module, the vacuum circuit breaking unit is provided with a three-phase current transformer, a zero-sequence current transformer, a live display and an isolating switch, and the control module compares a set fixed value with a zero-sequence current signal of the zero-sequence current transformer to judge single-phase grounding faults in and out of a user boundary. According to the utility model, the power supply condition of the demarcation circuit breaker switch cabinet can be monitored in real time by arranging the detection control unit, the occurrence of an accident inside a user is judged and confirmed by a signal fed back by the detection control unit, the fault is isolated, the power supply of a non-fault user is ensured to be recovered, the power failure area can be reduced, and the problem of responsibility dispute between the user and a power supply bureau is solved.

Description

Boundary breaker switch cabinet

Technical Field

The utility model relates to the field of power distribution networks, in particular to a demarcation circuit breaker switch cabinet for monitoring 10KV line faults.

Background

At present, when relay protection action time limit of a common high-voltage incoming cabinet in the market and relay protection action time limit of a substation outgoing switch of a power supply company are not matched, the substation outgoing switch is switched off. If the fault property is permanent, the outgoing line switch is not superposed successfully, the accident of a common user can cause the power failure of the whole distribution line, the accident can cause bad influence on the society, and the use requirement can not be met in the design requirement with relatively higher requirement and special places.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a demarcation breaker switch cabinet for monitoring 10KV line faults, which is mainly used at a branch line T joint or a user tail end (responsibility demarcation point), when a fault occurs in a user at the T joint of a 10KV cable line, if the fault occurs in a line incoming section or the fault occurs in the inner side of a user line incoming switch, the fault is isolated by determining that the internal accidents (over-current, short-circuit, small-current grounding and other accidents) of the user occur, and the power failure area can be reduced to ensure that power supply is recovered to non-fault users, thereby solving the problem of responsibility dispute between the user and a power supply bureau.

A boundary breaker switch cabinet comprises a vertical cabinet body, wherein a vacuum circuit breaking unit, a detection control unit, a microcomputer relay protection device, a PT unit and a GPRS communication module are arranged in the cabinet body, the detection control unit comprises a control module, a communication module used for receiving signals of the microcomputer relay protection device, the PT unit and the vacuum circuit breaking unit and feeding back the signals to the control module, a monitoring module used for monitoring the microcomputer relay protection device, the PT unit and the vacuum circuit breaking unit and feeding back monitoring signals to the communication module, and a display module, the GPRS communication module is used for receiving external signals and feeding back the received signals to the communication module of the detection control unit, the vacuum circuit breaking unit is provided with a three-phase current transformer, a zero-sequence current transformer, a live display and an isolating switch, the control module compares the zero-sequence current signals of the three-phase current transformer by setting a large fixed value and a small fixed value, to determine single-phase earth faults both inside and outside the user interface.

Further scheme: the electrified display comprises an incoming line end electrified display connected with an incoming line end line of the incoming line cable chamber and an outgoing line end electrified display connected with an outgoing line end line of the outgoing line cable chamber.

Further scheme: and the wire inlet cable chamber and the wire outlet cable chamber are provided with heat dissipation holes.

Further scheme: and a layer of electric ash is sprayed on the outer surface of the cabinet body.

Further scheme: the cabinet body bottom is equipped with the base, a layer of black paint of base surface spraying.

Further scheme: the PT unit is a voltage transformer cabinet and is arranged on the lower side of the incoming cable chamber.

Further scheme: the detection control unit is also provided with a brake separating indicator lamp and a brake closing indicator lamp, and the display module is a display screen and is embedded in the front side of the cabinet body.

Compared with the prior art, the utility model has the beneficial effects that: the power supply condition of the demarcation circuit breaker switch cabinet can be monitored in real time by arranging the detection control unit, when a fault occurs inside a user at the T joint of a 10 kilovolt cable line, if the fault occurs in a line incoming section or the fault occurs inside a line incoming switch of the user, the fault is isolated by judging and confirming the accident occurring inside the user through a signal fed back by the detection control unit, the power failure area can be reduced by ensuring that power supply is recovered to a non-fault user, and the problem of responsibility dispute between the user and a power supply bureau is solved.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the utility model.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic diagram of the present invention.

FIG. 2 is a structural block diagram of a detection control unit according to the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-2, in the embodiment of the present invention, a demarcation circuit breaker switch cabinet for 10KV line fault monitoring is mainly used at a branch line T junction or a user terminal (responsibility demarcation point), and includes a vertical cabinet body 1, a vacuum circuit breaking unit, a detection control unit 11, a microcomputer relay protection device, a PT unit 12, and a GPRS communication module 13 are arranged in the cabinet body 1, wherein the detection control unit 11 is suitable for being installed at the responsibility demarcation point of a distribution line user incoming line and also suitable for a branch line terminal line meeting requirements, after equipment is installed and put into operation, a single-phase ground fault and an interphase short circuit fault of a controlled branch line can be automatically removed, and the detection control unit 11 includes a control module, a communication module for receiving signals of the microcomputer relay protection device, the PT unit 12, and the vacuum circuit breaking unit and feeding back the signals to the control module, A monitoring module, display module for monitoring microcomputer relay protection device, PT unit 12 and vacuum circuit break unit and with monitoring signal feedback to communication module, detection control unit 11 still is equipped with separating brake pilot lamp 110 and combined floodgate pilot lamp 111, display module is display screen 112, inlays the front side at the cabinet body 1, GPRS communication module 13 can be used to receive external signal to signal feedback to detection control unit 11's communication module with receiving, the vacuum circuit break unit is equipped with three-phase current transformer, zero sequence current transformer, electrified display, isolator, control module is through setting up the zero sequence current signal comparison of big or small fixed value and zero sequence current transformer to judge the single-phase earth fault in user's border and outside the border.

Wherein, it is to be noted that, the zero sequence current signal led out by the zero sequence current transformer is compared with the fixed value set by the control module to distinguish and judge the single phase earth fault inside and outside the user boundary, the signal collected by the monitoring module is firstly, the collected signals are fed back to the control module for judgment processing, the signals after judgment processing are displayed through the display module, for the single-phase earth fault outside the user, because the zero sequence current detected by the zero sequence current transformer is far smaller than the zero sequence current detected when the single-phase earth fault occurs in the user, through proper setting of fixed value, can accurately judge the power supply failure of the area and control the area through the control module, meanwhile, the occurrence of the fault is judged by comparing the three-phase current transformer with a setting value set by the control module, and the interphase short-circuit fault state is memorized.

The utility model has the advantages that the power supply condition of the demarcation breaker switch cabinet can be monitored in real time by arranging the detection control unit 11, when a fault occurs in the interior of a user at the T joint of a 10 kilovolt cable line, if the fault occurs in a line incoming section or the fault occurs in the inner side of a line incoming switch of the user, the fault is isolated by judging and confirming the occurrence of the fault in the interior of the user through a signal fed back by the detection control unit 11, the power failure area can be reduced, and the problem of responsibility dispute between the user and a power supply bureau is solved.

Preferably, cabinet body 1 downside is equipped with inlet wire cable room 14 and outlet wire cable room 15, electrified display includes the electrified display 140 of inlet wire end that is connected with the inlet wire port circuit of inlet wire cable room 14 and the electrified display 150 of outlet wire end that is connected with the outlet wire port circuit of outlet wire cable room 15, wherein, PT unit 12 is the voltage transformer cabinet, locates the downside of inlet wire cable room 14.

Furthermore, inlet wire cable chamber 14 and the cable chamber 15 of being qualified for the next round of competitions are equipped with louvre 16, can effectually distribute the heat that inlet wire cable chamber 14 and cable chamber 15 of being qualified for the next round of competitions distribute through louvre 16, provide boundary circuit breaker cubical switchboard's life.

Preferably, the surface spraying one deck electric ash of the cabinet body 1 bottom is equipped with base 17, base 17 surface spraying one deck black paint, the cabinet body 1 that outdoor wind-blown sunshine was located in the protection that the spraying electric ash can be effectual.

It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the utility model 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. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. The utility model provides a boundary breaker cubical switchboard, includes vertical cabinet body (1), a serial communication port, be equipped with the vacuum in the cabinet body (1) and break the unit, detect the control unit (11), computer relay protection device, PT unit (12), GPRS communication module (13), detect the control unit (11) including control module, be used for receiving computer relay protection device, PT unit (12) and vacuum and break the unit signal and with feedback to control module's communication module, be used for monitoring computer relay protection device, PT unit (12) and vacuum and break the unit and with monitoring signal feedback to communication module's monitoring module, display module, GPRS communication module (13) are used for receiving external signal to signal feedback to the communication module who detects the control unit (11) with the signal that receives, the vacuum unit that breaks is equipped with three-phase current transformer, zero sequence current transformer, The control module compares a set fixed value with a zero sequence current signal of the zero sequence current transformer to judge single-phase earth faults inside and outside a user boundary.

2. The demarcation circuit breaker switchgear cabinet according to claim 1, characterized in that, the cabinet body (1) is provided with an incoming cable chamber (14) and an outgoing cable chamber (15) at the lower side, the live display comprises an incoming end live display (140) connected with an incoming port line of the incoming cable chamber (14) and an outgoing end live display (150) connected with an outgoing port line of the outgoing cable chamber (15).

3. Demarcation circuit breaker switchgear according to claim 2, characterized in that the incoming cable compartment (14) and the outgoing cable compartment (15) are provided with heat dissipation apertures (16).

4. A demarcation circuit breaker switchgear as claimed in claim 2, characterized in that the external surface of the cabinet body (1) is coated with a layer of electrical ash.

5. The demarcation circuit breaker switch cabinet according to claim 4, characterized in that, a base (17) is arranged at the bottom of the cabinet body (1), and a layer of black paint is sprayed on the surface of the base (17).

6. A demarcation circuit breaker switchgear, according to claim 2, characterized in that the PT unit (12) is a voltage transformer cabinet, placed on the lower side of the incoming cable compartment (14).

7. The demarcation circuit breaker switch cabinet according to claim 1, characterized in that, the detection control unit (11) is further provided with a switch-off indicator lamp (110) and a switch-on indicator lamp (111), and the display module is a display screen (112) embedded in the front side of the cabinet body (1).