CN219123764U

CN219123764U - Low-voltage comprehensive distribution box

Info

Publication number: CN219123764U
Application number: CN202223348901.9U
Authority: CN
Inventors: 由仁宽; 王晓利; 于英平; 李晓明
Original assignee: Liaoning Hualong Electric Technology Inc Co
Current assignee: Liaoning Hualong Electric Technology Inc Co
Priority date: 2022-12-13
Filing date: 2022-12-13
Publication date: 2023-06-02
Anticipated expiration: 2032-12-13

Abstract

The utility model relates to a low-voltage comprehensive distribution box which comprises a box body, wherein a reactive compensation unit, a feeder unit, a metering unit and a wire inlet unit are arranged in the box body; the reactive compensation unit is positioned at the left side of the box body, the feeder unit is positioned at the rear part of the right side of the box body, and the metering unit and the feeder unit are positioned at the front part of the right side of the box body; the box body is provided with three box doors on the front face, the box body is provided with two box doors on the back face, the box body is provided with a reactive compensation unit, a metering unit and a wire inlet unit, the metering unit is separated from the reactive compensation unit, the wire inlet unit and the wire inlet unit through a partition board, and an observation window is arranged on the upper portion of the box door corresponding to the metering unit. The utility model discloses a low-voltage comprehensive distribution box which is an integrated structure of electric energy distribution, metering, protection and reactive compensation. The structure is convenient to install and maintain, saves idle and reduces cost when being lifted. The box adopts stainless steel, and life is longer, and the casing upper cover adopts the room lid formula structure, has rain-proof effect.

Description

Low-voltage comprehensive distribution box

Technical Field

The utility model belongs to the technical field of distribution boxes, and relates to a low-voltage comprehensive distribution box.

Background

The existing transformer low-voltage matching equipment comprises a plurality of independent equipment such as a transformer, a distribution box, a metering box, a supplementing box and the like, and the complete distribution device is combined according to a certain wiring scheme. The distribution box, the metering box, the supplementing box and other devices are independently arranged on the low-voltage side of the transformer, the installation and maintenance are complex, the cost is high, and the installation space is large. And the low-voltage supporting equipment of the transformer is mostly used outdoors, and certain potential safety hazards exist when the line connection between independent equipment is exposed to the external environment.

Disclosure of Invention

In order to solve the technical problems, the utility model aims to provide a low-voltage comprehensive distribution box, which adopts an integrated structure, electric energy distribution, metering, protection and reactive compensation units are arranged in a stainless steel box body, and all matched units in the box body are connected with a transformer and a power supply user through incoming cables and appearance cables.

The utility model provides a low-voltage comprehensive distribution box, which comprises: the reactive compensation unit, the feeder unit, the metering unit and the incoming line unit are arranged in the box body; the reactive compensation unit is positioned at the left side of the box body, the feeder unit is positioned at the rear part of the right side of the box body, and the metering unit and the feeder unit are positioned at the front part of the right side of the box body; the box openly is equipped with three chamber doors, corresponds reactive power compensation unit, measurement unit and inlet wire unit respectively, the box back is equipped with two chamber doors, corresponds reactive power compensation unit and feeder unit respectively, the measurement unit separates with reactive power compensation unit, feeder unit and inlet wire unit through the baffle, and the chamber door upper portion that the measurement unit corresponds is equipped with the observation window.

In the low-voltage comprehensive distribution box, the wire inlet unit comprises a fuse type isolating switch, the fuse type isolating switch is fixed on a mounting plate on the right side of the box body, a wire inlet port is arranged on the upper portion of a right side box plate of the box body, and the low-voltage side of the transformer is connected with the fuse type isolating switch in the box body through a wire inlet cable.

In the low-voltage comprehensive distribution box, the feeder line unit comprises three power supply circuit breakers, one ends of the power supply circuit breakers are connected with a fuse type isolating switch, the other ends of the power supply circuit breakers are connected with outgoing cables, outgoing ports are arranged at the lower parts of a right side box plate and a left side box plate of the box body, and the outgoing cables are led out of the box body from the outgoing ports and then supply power to users; the supply circuit breaker is provided with a current protector.

In the low-voltage integrated distribution box of the present utility model, the reactive compensation unit includes: the low-voltage reactive compensation controller is connected with a first current transformer, and the first current transformer is sleeved on a copper bar at the wire outlet end of the fuse type isolating switch; one end of the first compensation circuit breaker is connected with the low-voltage reactive compensation controller and the outlet end of the fuse type isolating switch, the other end of the first compensation circuit breaker is connected with the capacitor unit through the plurality of low-voltage compound switches, and the capacitor unit comprises two groups of low-voltage star connection capacitors and two groups of low-voltage corner connection capacitors.

In the low-voltage comprehensive distribution box, a lightning arrester is arranged on a line connected with a first compensation breaker and a low-voltage composite switch; the low-voltage reactive compensation controller is also connected with a surge protector through a second compensation breaker.

In the low-voltage comprehensive distribution box, the metering unit comprises an electric energy meter, a junction box and a second current transformer which are sequentially connected, and the second current transformer is sleeved on a copper bar at the inlet wire end of the fuse type isolating switch.

In the low-voltage comprehensive distribution box, the installation plates of the reactive compensation unit, the feeder unit, the metering unit and the feeder unit are subjected to hot galvanizing corrosion prevention treatment.

In the low-voltage comprehensive distribution box, the box body is made of stainless steel plates, the stainless steel plates are subjected to matte treatment, and the protection grade is IP44.

The low-voltage comprehensive distribution box is suitable for electric energy distribution, metering, protection and reactive power automatic compensation of 0.4kV voltage class. The device is arranged on the low-voltage side of the pole-mounted transformer and has three basic functions of power distribution, compensation and metering. The box sets up in the transformer below, introduces the inlet wire cable through going on the port of box right side upper end. The lower ends of the left side and the right side of the box body are provided with appearance ports for leading out appearance cables to supply power for users. The low-voltage comprehensive distribution box is novel in structure, reasonable in internal layout, high in protection level and convenient to install, debug, maintain and overhaul.

Drawings

FIG. 1 is a front view of the interior of a low voltage utility box of the present utility model;

FIG. 2 is a rear view of the interior of a low voltage utility box of the present utility model;

FIG. 3 is an internal layout of a low voltage integrated distribution box of the present utility model;

the system comprises a 1-box body, a 2-fuse type isolating switch, a 3-low-voltage reactive compensation controller, a 4-first current transformer, a 5-capacitor unit, a 6-electric energy meter, a 7-junction box, an 8-second current transformer and a 9-medium collector.

Detailed Description

As shown in fig. 1 to 3, a low voltage integrated distribution box of the present utility model includes: the reactive compensation unit, the feeder unit, the metering unit and the incoming line unit are arranged in the box body 1. The reactive compensation unit is positioned at the left side of the box body 1, the feeder unit is positioned at the rear part of the right side of the box body, and the metering unit and the feeder unit are positioned at the front part of the right side of the box body; the box openly is equipped with three chamber doors, corresponds reactive power compensation unit, measurement unit and inlet wire unit respectively, the box back is equipped with two chamber doors, corresponds reactive power compensation unit and feeder unit respectively, the measurement unit separates with reactive power compensation unit, feeder unit and inlet wire unit through the baffle, and the chamber door upper portion that the measurement unit corresponds is equipped with the observation window.

The wire inlet unit comprises a fuse type isolating switch 2, the fuse type isolating switch 2 is fixed on a mounting plate on the right side of the box body 1, a wire inlet port is arranged on the upper portion of a right side box plate of the box body 1, and the low-voltage side of the transformer is connected with the fuse type isolating switch 2 inside the box body 1 through a wire inlet cable.

The feeder unit comprises three power supply circuit breakers QF 1-QF 3, one end of each power supply circuit breaker is connected with a fuse type isolating switch 2, the other end of each power supply circuit breaker is connected with an outgoing cable, outgoing ports are arranged at the lower parts of the right side box plate and the left side box plate of the box body 1, and the outgoing cables are led out of the box body from the outgoing ports and then supply power to users; the supply circuit breaker is provided with a current protector.

The reactive compensation unit includes: the low-voltage reactive compensation controller 3 and the first compensation breaker QF4, the low-voltage reactive compensation controller 3 is connected with the first current transformer 4, and the first current transformer 4 is sleeved on the copper bar of the outlet end of the fuse type isolating switch 2. One end of the first compensation breaker QF4 is connected with the low-voltage reactive compensation controller 3 and the outlet end of the fuse type isolating switch 2, the other end of the first compensation breaker QF is connected with the capacitor unit 5 through a plurality of low-voltage compound switches FK, and the capacitor unit 5 comprises two groups of low-voltage star connection capacitors and two groups of low-voltage corner connection capacitors.

A lightning arrester is arranged on a line connected with the first compensation breaker QF4 and the low-voltage compound switch FK; the low-voltage reactive compensation controller 3 is also connected to a surge protector via a second compensation breaker QF 5.

The metering unit comprises a middle collector 9, an electric energy meter 6, a junction box 7 and a second current transformer 8 which are sequentially connected, and the second current transformer 8 is sleeved on a copper bar at the inlet wire end of the fuse type isolating switch 2.

And the reactive power compensation unit, the feeder unit, the metering unit and the installation plates of the feeder unit are subjected to hot galvanizing corrosion prevention treatment.

The box body is made of stainless steel plates, the stainless steel plates are subjected to matte treatment, and the protection grade is IP44.

The foregoing description of the preferred embodiments of the utility model is not intended to limit the scope of the utility model, but rather to enable any modification, equivalent replacement, improvement or the like to be made without departing from the spirit and principles of the utility model.

Claims

1. A low voltage integrated distribution box, comprising: the reactive compensation unit, the feeder unit, the metering unit and the incoming line unit are arranged in the box body; the reactive compensation unit is positioned at the left side of the box body, the feeder unit is positioned at the rear part of the right side of the box body, and the metering unit and the feeder unit are positioned at the front part of the right side of the box body; the box openly is equipped with three chamber doors, corresponds reactive power compensation unit, measurement unit and inlet wire unit respectively, the box back is equipped with two chamber doors, corresponds reactive power compensation unit and feeder unit respectively, the measurement unit separates with reactive power compensation unit, feeder unit and inlet wire unit through the baffle, and the chamber door upper portion that the measurement unit corresponds is equipped with the observation window.

2. The low voltage integrated distribution box of claim 1, wherein the incoming line unit comprises a fuse type isolating switch, the fuse type isolating switch is fixed on a mounting plate on the right side of the box body, an incoming line port is arranged on the upper portion of a right side box plate of the box body, and the low voltage side of the transformer is connected with the fuse type isolating switch in the box body through an incoming line cable.

3. The low voltage integrated distribution box according to claim 2, wherein the feeder unit comprises three power supply circuit breakers, one end of each power supply circuit breaker is connected with a fuse type isolating switch, the other end of each power supply circuit breaker is connected with an outgoing cable, outgoing ports are arranged at the lower parts of the right side box plate and the left side box plate of the box body, and the outgoing cables are led out of the box body from the outgoing ports to supply power to users; the supply circuit breaker is provided with a current protector.

4. The low voltage integrated distribution box of claim 2, wherein the reactive compensation unit comprises: the low-voltage reactive compensation controller is connected with a first current transformer, and the first current transformer is sleeved on a copper bar at the wire outlet end of the fuse type isolating switch; one end of the first compensation circuit breaker is connected with the low-voltage reactive compensation controller and the outlet end of the fuse type isolating switch, the other end of the first compensation circuit breaker is connected with the capacitor unit through the plurality of low-voltage compound switches, and the capacitor unit comprises two groups of low-voltage star connection capacitors and two groups of low-voltage corner connection capacitors.

5. The low voltage integrated distribution box of claim 4 wherein a lightning arrester is provided on the line connecting the first compensating circuit breaker and the low voltage composite switch; the low-voltage reactive compensation controller is also connected with a surge protector through a second compensation breaker.

6. The low-voltage integrated distribution box according to claim 2, wherein the metering unit comprises an electric energy meter, a junction box and a second current transformer which are sequentially connected, and the second current transformer is sleeved on a copper bar at the inlet wire end of the fuse type isolating switch.