CN219554664U

CN219554664U - Sectional protection and arrangement branch box for 0.4kV low-voltage line

Info

Publication number: CN219554664U
Application number: CN202222870255.6U
Authority: CN
Inventors: 左伟华
Original assignee: Guan Wenjie; Ji Zaiyong; Zhao Kenlong
Current assignee: Guan Wenjie; Ji Zaiyong; Zhao Kenlong
Priority date: 2022-10-31
Filing date: 2022-10-31
Publication date: 2023-08-18
Anticipated expiration: 2032-10-31

Abstract

The utility model provides a sectional protection and arrangement branch box for a 0.4kV low-voltage line, which sequentially connects three-phase four-wire voltage current and zero-wire current to a voltage current terminal of an LTU intelligent low-voltage state monitoring terminal, and realizes functions of user outage and power restoration event research, judgment and reporting, self-identification of household change relation of a supporting platform region, automatic fault identification and isolation and accurate supporting of line loss monitoring and management of the meter box based on a meter; the auxiliary grounding electrode is arranged at the bottom of the low-voltage line branch box, so that when a zero line in a certain area fails, the auxiliary grounding in the branch box can be effectively grounded, and 380V voltage is prevented from directly entering a household, so that electrical equipment is prevented from being burnt or even people suffer from casualties; when lightning current occurs in the line, the lightning current is led to the ground quickly, the purpose of protecting equipment is achieved, the equipment in operation is prevented from lightning damage, an external power supply quick connection device is arranged in the low-voltage line branch box, and the generator can supply power immediately through a quick plug connector when the fault occurs, so that the dual-power supply function is achieved.

Description

Sectional protection and arrangement branch box for 0.4kV low-voltage line

Technical Field

The utility model relates to the technical field of wiring branch boxes, in particular to a sectional protection and arrangement branch box for a 0.4kV low-voltage line.

Background

The 0.4kV low-voltage line branch line box has the advantages of compact structure, simple and quick installation, small appearance, small occupied area and convenient maintenance, can meet the requirements of urban users on a low-voltage power distribution network, and is widely applied.

The low-voltage line is likely to be loaded more at important nodes, so that the line is disordered, potential safety hazards exist, and equipment accidents are extremely easy to cause.

The utility model provides a common low pressure circuit branch case, it includes the branch case box, be equipped with rain-proof edge at branch case box top, a set of isolation switch is placed to inlet wire department in the branch case box, a row of wiring copper bar is placed to the below level, the wiring copper bar passes through supporting insulator to be fixed on branch case box inner wall, metering epitope and LTU position are installed respectively at copper bar both ends, two sets of and above air circuit breaker are installed to the below, vertical baffle that is equipped with in the branch case box, the box edge has earthing pole and zero line row through the bolt.

The common low-voltage line branch box can play a role in segmentation and protection, and when a line at the front section of the low-voltage line branch box fails, the whole branch box and the lower parts are forced to have power failure. When the zero line of the transformer area is burnt out or the contact is bad, 380V voltage is easy to be caused to directly enter a household, so that electric equipment is burnt out or even personal casualties are caused. When any user in the low-voltage line branch box fails, the failure can not be found and repaired in time.

Disclosure of Invention

The utility model aims to provide a sectional protection and arrangement branch box for a 0.4kV low-voltage circuit, which aims to solve the problems in the background technology.

The above object of the present utility model can be achieved by the following technical solutions:

the utility model provides a sectional protection and arrangement branch box for a 0.4kV low-voltage circuit, which comprises a box body, wherein an isolation disconnecting link and a circuit breaker are fixedly arranged in the box body, a wire inlet hole and a wire outlet hole are formed in the lower surface of the box body, a wire outlet cable is arranged in the wire outlet hole, the wire inlet cable is arranged in the wire inlet hole, the inner end of the wire inlet cable is electrically connected with a wire inlet connecting column of the isolation disconnecting link, the wire outlet connecting column of the isolation disconnecting link is electrically connected with the wire inlet connecting column of the circuit breaker through a cable, and the wire outlet connecting column of the circuit breaker is electrically connected with the inner end of the wire outlet cable.

Preferably, the box body is internally fixedly provided with a meter and a quick plug connector, the detection end of the meter is fixedly provided with a CT coil, the CT coil is wound on a connecting cable of an isolation disconnecting link and a circuit breaker, the circuit breaker is three in parallel connection, and the wire inlet end of the quick plug connector is connected with the wire inlet end of the circuit breaker in parallel.

Preferably, an LTU is fixedly installed in the box body, and a wire inlet end of the LTU is connected with a wire inlet end of the quick plug connector in parallel.

Preferably, the number of the wire outlet holes is three, the three parallel circuit breakers are independently connected with the wire outlet cables, and each wire outlet cable independently passes through one wire outlet hole.

Preferably, the inner side wall of the box body is fixedly provided with a grounding row and a zero line row.

Preferably, the outer edge of the top plate of the box body is fixedly provided with a rain-proof eave.

Preferably, the disconnecting link, the circuit breaker, the LTU and the wire inlet end of the quick plug connector are electrically connected with the 0.4kV lightning arrester through cables, and the 0.4kV lightning arrester is grounded

The utility model has the characteristics and advantages that:

and the three-phase four-wire voltage current and the zero line current are sequentially connected to a voltage current terminal of the LTU intelligent low-voltage state monitoring terminal, and based on a meter gauge, the functions of judging and reporting a user outage and power restoration event, supporting self-identification of a household transformer relation of a supporting platform area, automatic fault identification and isolation and accurate meter box line loss monitoring and management are realized.

The auxiliary grounding electrode is arranged at the bottom of the low-voltage line branch box, so that when a zero line in a certain area fails, the auxiliary grounding in the branch box can be effectively grounded, and 380V voltage is prevented from directly entering a household, so that electrical equipment is burnt and even casualties are caused.

When lightning current occurs in the line, the lightning current is led to the ground quickly, the purpose of protecting equipment is achieved, the equipment in operation is prevented from lightning damage, an external power supply quick connection device is arranged in the low-voltage line branch box, and the generator can supply power immediately through a quick plug connector when the fault occurs, so that the dual-power supply function is achieved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of the layout structure of the present utility model.

Reference numerals illustrate:

in the figure: 1. the device comprises a box body, 2, a rain-proof eave, 3, an isolation disconnecting link, 4, a circuit breaker, 5, an outgoing cable, 6, LTU,7, a meter, 8, a quick plug connector, 9, a zero line row, 10, a grounding row, 11, an incoming cable, 12, an outgoing hole, 13 and an incoming hole.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

In the description of the present utility model, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or those that are conventionally put in use of the inventive product, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific direction, be configured and operated in a specific direction, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal," "vertical," "overhang," and the like do not denote a requirement that the component be absolutely horizontal or overhang, but rather may be slightly inclined. As "horizontal" merely means that its direction is more horizontal than "vertical", and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present utility model, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

Example 1

As shown in fig. 1, the utility model provides a sectional protection and arrangement branch box for a 0.4kV low-voltage line, which comprises a box body 1, wherein an isolation disconnecting link 3 and a circuit breaker 4 are fixedly arranged in the box body 1, a wire inlet hole 13 and a wire outlet hole 12 are formed in the lower surface of the box body 1, a wire outlet cable 5 is arranged in the wire outlet hole 12, a wire inlet cable 11 is arranged in the wire inlet hole 13, the inner end of the wire inlet cable 11 is electrically connected with a wire inlet connecting column of the isolation disconnecting link 3, the wire outlet connecting column of the isolation disconnecting link 3 is electrically connected with a wire inlet connecting column of the circuit breaker 4 through a cable, and the wire outlet connecting column of the circuit breaker 4 is electrically connected with the inner end of the wire outlet cable 5.

The box body 1 is a basic bearing structure of the utility model, provides a mounting foundation for internal structures and elements, and the isolating disconnecting link 3 realizes on-off isolation of power supply inside the whole box body 1 through own functionality, so that quick protection measures can be realized, the circuit breaker 4 realizes on-off control for the purpose of demand through own functionality, the cable 5 and the cable 11 are effectively connected with circuits in the box body 1 and external circuits, and the cable hole 13 and the cable hole 12 provide wiring positions for the cable 11 and the cable 5.

Specifically, the box 1 is internally and fixedly provided with a meter 7 and a quick plug connector 8, a CT coil is fixedly arranged at the detection end of the meter 7, the CT coil is wound on a connecting cable for isolating the disconnecting link 3 and the circuit breaker 4, the circuit breaker 4 is three in parallel connection, and the wire inlet end of the quick plug connector 8 is parallel connection with the wire inlet end of the circuit breaker 4.

The meter 7 effectively monitors the current and the voltage, the CT coil senses and monitors the current and the voltage flowing through the connecting cable through the function of the CT coil, the circuit breaker 4 is connected and controlled through the function of the CT coil and the parallel connection, the quick plug connector 8 is connected and controlled through the function of the CT coil, and the quick bridge circuit power supply after the fault occurs is realized.

Specifically, an LTU6 is fixedly installed in the box 1, and a wire inlet end of the LTU6 is connected in parallel with a wire inlet end of the quick plug connector 8.

The low-voltage state of the whole circuit is effectively monitored by setting the LTU 6.

Specifically, the number of the wire outlets 12 is three, the three parallel circuit breakers 4 are independently connected with the wire cables 5, and each wire cable 5 independently passes through one wire outlet 12.

Through the use of independent wiring and independent cable, provide the convenience to follow-up maintenance and change.

Specifically, the inner side wall of the box body 1 is fixedly provided with a grounding row 10 and a zero line row 9.

By providing the ground bar 10 and the neutral bar 9, the circuit can be better protected from leakage, and thus the whole installability is achieved.

Specifically, the outer edge of the top plate of the box body 1 is fixedly provided with a rain-proof eave 2.

Through setting up rain-proof eaves 2, can effectually protect the outdoor use of device to guarantee the aridity in the device.

Specifically, the disconnecting link 3, the circuit breaker 4, the LTU6 and the wire inlet ends of the quick plug connector 8 are all electrically connected with the 0.4kV lightning arrester through cables, and the 0.4kV lightning arrester is grounded.

Through 0.4kV arrester for when suffering the thunderbolt, can be effectual with heavy current earthing, thereby avoid damaging equipment, and 0.4kV arrester can locate in the box 1 also can locate outside the box 1.

The working principle of the utility model is as follows:

during the use, the external circuit is connected with the inlet cable 11 and the outlet cable 5 of device, monitors voltage and electric current in the main line of power supply through the strapping table 7 in the power supply process, monitors the minimum state of voltage in the device through LTU6 simultaneously to realize dynamic monitoring control as a whole, arrange with the outlet cable 5 through parallelly connected circuit breaker 4 moreover, conveniently change and maintain, quick plug connects 8 and can carry out quick bridging when breaking down through self messenger external structure, guarantees the stability of power supply.

While the foregoing is directed to embodiments of the present utility model, other and further details of the utility model may be had by the present utility model, it should be understood that the foregoing description is merely illustrative of the present utility model and that no limitations are intended to the scope of the utility model, except insofar as modifications, equivalents, improvements or modifications are within the spirit and principles of the utility model.

Claims

1. The utility model provides a 0.4kV low pressure circuit is with segmentation protection and arrangement feeder pillar, includes box (1), its characterized in that: the utility model discloses a wire-connection structure of the electric power switch, including box (1), box (1) internal fixation has isolation switch (3) and circuit breaker (4), entrance hole (13) and wire outlet (12) have been seted up to the lower surface of box (1), wire outlet (5) have been laid to wire outlet (12), wire inlet (11) have been laid to wire inlet (13), the inlet wire spliced pole of isolation switch (3) is connected to the inner electricity of wire inlet (11), the inlet wire spliced pole of isolation switch (3) passes through the inlet wire spliced pole of cable electricity connection circuit breaker (4), the inner of wire outlet cable (5) is connected to the outlet wire spliced pole electricity of circuit breaker (4).

2. The segment protection and arrangement branch box for 0.4kV low-voltage lines according to claim 1, wherein: the utility model discloses a high-voltage power supply circuit breaker, including box (1) and quick plug connector (8), the detection end fixed mounting of strapping table (7) has the CT coil, and CT coil winding isolation switch (3) and the connecting cable of circuit breaker (4), circuit breaker (4) are parallelly connected three, the inlet wire end of quick plug connector (8) is parallelly connected with the inlet wire end of circuit breaker (4).

3. The segment protection and arrangement branch box for 0.4kV low-voltage lines according to claim 1, wherein: an LTU (6) is fixedly installed in the box body (1), and the wire inlet end of the LTU (6) is connected with the wire inlet end of the quick plug connector (8) in parallel.

4. The segment protection and arrangement branch box for 0.4kV low-voltage lines according to claim 1, wherein: the number of the wire outlet holes (12) is three, the three parallel circuit breakers (4) are independently connected with the wire outlet cables (5), and each wire outlet cable (5) independently passes through one wire outlet hole (12).

5. The segment protection and arrangement branch box for 0.4kV low-voltage lines according to claim 1, wherein: the inner side wall of the box body (1) is fixedly provided with a grounding row (10) and a zero line row (9).

6. The segment protection and arrangement branch box for 0.4kV low-voltage lines according to claim 1, wherein: the outer edge of the top plate of the box body (1) is fixedly provided with a rain-proof eave (2).

7. A segment protection and organization feeder box for 0.4kV low voltage lines according to claim 3, characterized by: the isolating disconnecting link (3), the circuit breaker (4), the LTU (6) and the incoming line end of the quick plug connector (8) are electrically connected with the 0.4kV lightning arrester through cables, and the 0.4kV lightning arrester is grounded.