CN218499036U

CN218499036U - Comprehensive control box for motor

Info

Publication number: CN218499036U
Application number: CN202222171675.5U
Authority: CN
Inventors: 马国强; 吴开起; 赵新赢; 张灿伍; 吕先品; 刘彦霞; 徐刚; 杨海涛; 韩长英; 吕华英
Original assignee: SHANDONG AIPU ELECTRICAL EQUIPMENT CO Ltd
Current assignee: SHANDONG AIPU ELECTRICAL EQUIPMENT CO Ltd
Priority date: 2022-08-17
Filing date: 2022-08-17
Publication date: 2023-02-17
Anticipated expiration: 2032-08-17

Abstract

The utility model provides a motor comprehensive control box, which comprises a box body, wherein an intelligent capacitor is arranged at the bottom in the box body, and a current sensor and a secondary fuse terminal row of a motor comprehensive protector are arranged above the intelligent capacitor; a contactor is arranged above a current sensor of the motor comprehensive protector; a breaker is arranged at the top of the box body, a lightning arrester is arranged on one side of the breaker, and a current transformer is arranged below the breaker; the risk that the motor is burnt out due to various reasons is reduced, the line loss is reduced, the line voltage loss is reduced, and the investment of connecting cables is saved; meanwhile, the integrated design of motor control and local compensation is convenient for the operation management of customers, and the secondary investment is reduced.

Description

Comprehensive control box for motor

Technical Field

The utility model belongs to the technical field of power equipment control, concretely relates to motor integrated control case.

Background

The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art.

At present, the control box of a three-phase asynchronous motor (the motor for short) has the problems of rough scheme, single function and the like. Most motor control boxes also use a bimetallic strip thermal relay as an overload protection element, and the thermal relay has the defects of large influence of environmental temperature on action reliability, inaccurate setting current, incomplete protection function, easy misoperation during the starting of the motor and the like, so that potential hidden danger is brought to the safe operation of the motor. The motor is an inductive load, reactive power needs to be absorbed from a power grid during operation, usually, in order to improve a power factor, a user can perform centralized compensation on a low-voltage side of a transformer by a capacitor cabinet, the centralized compensation is convenient for operation management of the capacitor cabinet, but the centralized compensation cannot reduce line current (line loss) between the transformer and the motor, or the centralized compensation is not beneficial to selecting a cable with a smaller cross section for a line, and for a high-power motor far away from a power distribution room, the loss, the voltage loss or the cable investment of a line part is considerable. Although some users have the in-situ compensation capacitor installed beside the motor, the in-situ compensation device is independent from the control box, and the two devices are installed separately, so that the unified maintenance management is not facilitated, and meanwhile, if the control box and the in-situ compensation device are not produced uniformly, matching and safety problems can exist.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a solve above-mentioned problem, provided a motor integrated control case, it is that protect function is comprehensive, the action is reliable and can realize the integrated control case of compensation on the spot, sets up intelligent benefit condenser altogether in the control box, realizes motor control and compensation integrated design on the spot.

According to some embodiments, the utility model provides a motor integrated control case adopts following technical scheme:

a motor comprehensive control box comprises a box body, wherein an intelligent capacitor is arranged at the bottom in the box body, and a current sensor and a secondary fuse terminal bar of a motor comprehensive protector are arranged above the intelligent capacitor;

a contactor is arranged above a current sensor of the motor comprehensive protector; the top of box is provided with the circuit breaker, circuit breaker one side is provided with the arrester, the below of circuit breaker is provided with current transformer.

Furthermore, the upper port of the circuit breaker is connected with a transformer through a cable, the lower port of the circuit breaker is connected with the lightning arrester, the lightning arrester is connected with the current transformer, the current transformer is connected with the contactor, and the contactor is respectively connected with the intelligent capacitor and the current sensor through two branches of the lower port.

Further, the current sensor is connected with the motor through a cable.

Furthermore, a box body door is arranged in front of the box body, and a front door lock is arranged on the box body door.

Furthermore, a heat dissipation strip-shaped hole is formed in the lowest portion of the box body door.

Furthermore, a nameplate is arranged above the heat dissipation strip-shaped hole.

Furthermore, a display screen of the comprehensive motor protector is arranged above the box body door, and an indicator lamp and a button are arranged below the display screen.

Furthermore, a small box body door is also arranged below the outer part of the side surface of the box body.

Furthermore, a small door lock is arranged on the small box body door.

Further, the box body door is installed on the box body through a door hinge.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model discloses combine motor control and compensation two aspects's technique in place effectively together, provide a control function and compensation function modularization in place, operation and operation integrated's control box. In the aspect of control, the comprehensive motor protector with comprehensive functions is used for replacing a thermal relay with a single function, so that the safe operation of the motor is greatly improved; in the aspect of reactive compensation, an intelligent co-compensation capacitor is arranged in a control box, so that the line loss is reduced, the line voltage loss is reduced, the investment of connecting cables is saved, meanwhile, the integrated design of motor control and local compensation is convenient for the operation management of customers, and the secondary investment is reduced.

Drawings

The accompanying drawings, which form a part of the specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without unduly limiting the scope of the invention.

FIG. 1 is a schematic diagram of a system connection according to the present invention;

fig. 2 is a front view of the case of the present invention;

FIG. 3 is a rear view of the housing of the present invention;

fig. 4 is a side view of the case of the present invention;

FIG. 5 is an inside view of the case of the present invention;

wherein, 1, the motor comprehensive protector display screen; 2. an indicator light and a button; 3. a front door lock; 4. a nameplate; 5. a heat-dissipating strip-shaped hole; 6. a door hinge; 7. a column; 8. a circuit breaker; 9. a current transformer; 10. a contactor; 11. copper bars; 12. an insulator; 13. a current transformer of the motor comprehensive protector; 14. an intelligent capacitor; 15. a small box door; 16. a small door lock; 17. a lightning arrester; 18. a secondary fuse terminal row; 19. and the component is provided with a beam.

The specific implementation mode is as follows:

the present invention will be further explained with reference to the accompanying drawings and examples.

It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the invention. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

In the present invention, the terms such as "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "side", "bottom", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, and are only the terms determined for convenience of describing the structural relationship of each component or element of the present invention, and are not specific to any component or element of the present invention, and are not to be construed as limiting the present invention.

In the present invention, terms such as "fixedly connected", "connected", and the like are to be understood in a broad sense, and may be fixedly connected, or may be integrally connected or detachably connected; may be directly connected or indirectly connected through an intermediate. For persons skilled in the art, the specific meanings of the above terms in the present invention can be determined according to specific situations, and should not be construed as limiting the present invention.

Example 1

An embodiment of the utility model provides a motor integrated control box, as shown in fig. 2-5, including the box, the bottom sets up installs intelligent capacitor 14 in the box, is provided with motor integrated protector's current sensor 13 and secondary fuse terminal row 18 above intelligent capacitor 14;

a contactor 10 is arranged above a current sensor 13 of the motor comprehensive protector; the top of box is provided with

circuit breaker

8, 8 one sides of circuit breaker are provided with arrester 17, the below of circuit breaker 8 is provided with current transformer 9.

The motor comprehensive protector is divided into two parts, one part is a current sensor and is arranged in a control box, and the other part is a display screen and is arranged on a box door of the control box and used for setting parameters and displaying electric quantity such as voltage, current and the like and fault types.

The upper port of the breaker 8 is connected with the transformer through a cable, the lower port of the breaker 8 is connected with the lightning arrester 17, the lightning arrester 17 is connected with the current transformer 9, the current transformer is connected with the contactor 10, the lower port of the contactor is provided with two branches, the two branches are respectively connected with the intelligent capacitor 14 and the current sensor 13 of the motor comprehensive protector, and then the current sensor 13 of the motor comprehensive protector is connected with the motor through a cable.

Specifically, as shown in fig. 1, an upper port of a breaker QF is connected to a transformer T through a cable L, a lower port is connected to a lightning arrester F, and then the breaker QF penetrates through a sampling current transformer CT and is connected to an upper port of a contactor KM; the lower port of the contactor KM is provided with two branches, one branch is connected with the intelligent capacitor CA, and the other branch is connected to the motor M through a cable after passing through a current sensor of a motor comprehensive protector MPD. The intelligent capacitor CA is connected with the lower port of the contactor KM, and aims to reduce the total current flowing through the contactor and improve the working condition of a main contact of the contactor.

As shown in fig. 2, a box door is arranged in front of the box body, a front door lock 3 is arranged on the box door, and a heat dissipation strip-shaped hole 5 is arranged at the lowest part of the box door. And a nameplate 4 is arranged above the heat dissipation strip-shaped hole 5. The upper side of the box body door is provided with a display screen 1 of the comprehensive motor protector, and an indicator lamp and a button 2 are arranged below the display screen 1. A motor comprehensive protector display screen is arranged on the front door of the control box, so that data such as motor current, voltage and the like can be conveniently checked at any time.

A small bin door 15 is also provided below the outside of the bin sides. A small door lock 16 is arranged on the small box body door. And a small door is arranged on the side door of the control box and used for setting and maintaining the capacitor.

As shown in fig. 3, a heat dissipation strip-shaped hole 5 is also formed in the back of the box body, and vent holes are formed in the lower portion of the control box door and the upper portion of the back of the control box door, so that heat generated by the contactor and the capacitor can be taken away.

As shown in fig. 4, a column 7 is welded in the control box, a component mounting beam 19 is fixed to the column, and an electric component is mounted on the beam. The overall layout satisfies the electrical clearance, facilitates wiring and is favorable for heat dissipation.

Specifically, as shown in fig. 1, the internal electrical components include a circuit breaker QF, a lightning arrester F, a current transformer CT, a contactor KM, a motor comprehensive protector MPD, and an intelligent capacitor bank CA. The circuit breaker is used for disconnecting the main power supply and protecting faults; the lightning arrester is used for overvoltage protection; the current transformer is used for sampling reactive compensation current; the contactor is used for controlling the starting and stopping of the motor; the motor comprehensive protector is used for motor fault protection; the intelligent capacitor bank is used for in-situ reactive compensation. In the aspect of control, the comprehensive motor protector with comprehensive functions is used for replacing a thermal relay with single function, so that the safe operation of the motor is greatly improved; in the aspect of reactive compensation, an intelligent co-compensation capacitor is arranged in the control box, so that the line loss is reduced, the line voltage loss is reduced, and the investment of connecting cables is saved. Meanwhile, the integrated design of motor control and local compensation is convenient for the operation management of customers, and the secondary investment is reduced.

Preferably, the circuit breaker is of a 3P thermomagnetic general type;

preferably, the lightning arrester is of a model HY1.5W;

preferably, the current transformer is of a BH type;

preferably, the contactor is model CJ 20;

preferably, the comprehensive protector of the motor is 380V, and the measurement and display are split type universal models;

preferably, the intelligent capacitor is a 450V compound switch switching type.

The intelligent capacitors are of a zero-crossing switching type, switching inrush current is small, the capacitors are integrated with switches, switching elements and protection elements, each intelligent capacitor can automatically output 3 capacities according to the reactive power required by the motor, and the minimum compensation step length is 5kVar. The motor control box can flexibly adjust the scheme according to the control requirement, and the installation position of the reserved contactor can be expanded into positive and negative rotation + in-place compensation, star triangle starting + in-place compensation and the like. The motor control box has stronger universality, the high-power motor control box can be directly used on a low-power motor by adjusting the action current of the comprehensive protector without replacing components, and at the moment, the intelligent capacitor can also automatically put in a smaller compensation capacity without replacing a new capacitor.

Although the present invention has been described with reference to the accompanying drawings, it is not intended to limit the scope of the present invention, and those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without inventive work are still within the scope of the present invention.

Claims

1. The motor comprehensive control box is characterized by comprising a box body, wherein an intelligent capacitor is arranged at the bottom in the box body, and a current sensor and a secondary fuse terminal bar of a motor comprehensive protector are arranged above the intelligent capacitor;

2. The motor integrated control box according to claim 1, wherein the upper port of the circuit breaker is connected with the transformer through a cable, the lower port of the circuit breaker is connected with the lightning arrester, the lightning arrester is connected with the current transformer, the current transformer is connected with the contactor, and the contactor is respectively connected with the intelligent capacitor and the current sensor through two branches of the lower port.

3. An integrated motor control box according to claim 2, wherein said current sensor is connected to the motor through a cable.

4. The motor integrated control box of claim 1, wherein a box door is provided in front of the box, and a front door lock is provided on the box door.

5. The motor integrated control box of claim 4, wherein a heat-dissipating strip-shaped hole is formed at the lowermost portion of the box body door.

6. The motor integrated control box of claim 5, wherein a nameplate is disposed above the heat-dissipating strip-shaped hole.

7. The motor integrated control box according to claim 4, wherein a motor integrated protector display screen is arranged above the box body door, and an indicator light and a button are arranged below the display screen.

8. An integrated motor control cabinet according to claim 1, wherein a small cabinet door is also provided below the outside of the side of said cabinet.

9. The integrated control box for electric motors of claim 8, wherein a small door lock is provided on the small box door.

10. The motor complex control box of claim 8, wherein said box door is mounted on said box body by a door hinge.