KR20170024912A

KR20170024912A - Motor Control center

Info

Publication number: KR20170024912A
Application number: KR1020150120508A
Authority: KR
Inventors: 김진열
Original assignee: 김진열
Priority date: 2015-08-26
Filing date: 2015-08-26
Publication date: 2017-03-08

Abstract

The present invention relates to a motor control center, which is a system for controlling power at the center when operating various motors. Since operation components, control components, and connection components are disposed altogether in a control unit capable of siding in and out from a cabinet, only withdrawal of a single control unit enables inspection, replacement, and repair for all area of the corresponding control unit to enhance work efficiency. Since a short-circuit of a power supply unit and a short-circuit of a cable connection terminal can be performed simultaneously with the withdrawal of the control unit, the short-circuit operation can be more rapidly and safely achieved without a separate short-circuit operation for the power supply unit and the cable connection terminal. Also, since only insertion of the control unit in which the work is finished enables the power supply and the cable connection automatically, re-operation times and operating waiting times can be significantly reduced. In addition, since all of the control components are disposed in the control unit by using a bottom panel to decrease a height of the cabinet and also entirely miniaturize the cabinet, convenience in operation and space utilization in installation place can be enhanced.

Description

[0001] The present invention relates to a motor control center,

[0001] The present invention relates to a motor control panel, which is a system for centrally controlling a power supply in operating various motors, and more particularly, to a control panel in which a plurality of control units are vertically stacked in a control box enclosure, The MCCB automatically disconnects the power supply from the main bus bar when the control unit is taken out, and the connection terminal for connection between the desk panel and the local panel is automatically disconnected from the connector of the enclosure By doing so,

Generally, many motors are operated in various places such as factories, buildings, and industrial facilities for water and sewage control, temperature control, air conditioning, and the like.

The motor control center (MCC), which is designed to supply or control the electric power for driving a motor pump (motor pump) accompanying such a field motor or an electric motor, is used to safely protect the motor and the load device , And distributes the low-voltage electricity supplied from the transformer to the motor and monitors and blocks the overcurrent from flowing.

Since such an electric motor needs to be driven or stopped automatically in accordance with the requirements of the field, a motor using an electromagnetic switch is used to control the electric motor.

In addition, when the motor is used in many cases, a control panel dedicated to the motor in which a plurality of control units for the motor are integrated in one enclosure (cabinet) is manufactured for the purpose of management and operation, and each motor is controlled .

The structure of each control unit in such an electric motor control board includes a Molded Case Circuit Breaker (MCCB) / No Fuse Breaker (NFB); MC (Magnet Contactor); MPR (Motor Protection Relay): OCR (Over Current Relay) / EOCR (Electronic Over Current Relay); And the like, which are used to protect and control the motor. In addition, CT (Current Transfomer): A-meter: V-meter: S / W, Lamp:

Among them, the MCCB / NFB is intended to protect against overload interruption, and when the leakage current flowing in the leakage current exceeds the rated current, the MCCB / NFB is turned OFF. Here, overload refers to excessive current due to short circuit, excessive use of load (instrument, machine), excessive current flow and over current due to short circuit.

The MC is a device that turns on / off the load current by an external signal. In this connection, there is an MS (Magnetic Switch), and the MS is a state in which the overload relay is combined, and a signal generated in the overload relay controls the contactor operating coil power. Therefore, in terms of products, the switch is a product to which an overload relay (thermal, electronic) is attached to the contactor.

Accordingly, a motor control center (MCC), which is a kind of an electric distribution board for controlling the motor, is connected to an electric room or a machine room of various facilities by a motor, and a desk panel is installed in the central control room. And a local panel is installed at each site where the motor is installed.

That is, in a water purification plant such as a water purification plant, there is provided a motor that operates when the water gate is opened and a water pump motor that lifts the water, and the motor control panel is a kind of a switchboard that controls such a motor.

Accordingly, the motor control panel installed in each industrial site is provided with a plurality of control units for controlling motors installed in the field, and the motor control panel, the plurality of local panels installed on the plurality of sites, and the desk panels installed in the central control room And the on / off signals of the lamps of the respective control units are sent to the desk panel of the central control room by wire, so that the status and operation of the control panel of the motor can be controlled on the desk panel And a system capable of controlling each of the motors installed in a plurality of sites.

The motors connected to the respective control units operate by the control unit of the motor control panel. However, in order to check the operation state of the motor directly in the field, a local panel is separately installed for each site to control the motor In the conventional apparatus as described above, 6 to 10 wires are connected to a desk panel installed in the central control room and a plurality of local panels installed in the field for each control unit installed in the motor control panel.

Such an electric motor control panel has been disclosed by MCC having a UNIT housing structure in which an MCCB handle, a UNIT input handle and a position switch are integrated with each other as in the registered patent No. 10-1143817, and is modularized as in Registration Practical Utility Model No. 20-0476583 And an electric motor control panel which can easily combine and disassemble the cables has been found.

1, a plurality of control units 110 and 110 'are vertically stacked in an enclosure 100, and the control units 110 and 11' are connected to the front of the control units 110 and 11 ' It is possible to check and control the operation state through the exposed MCCB knob, function button and indicator. In addition, the enclosure 100 may be installed in a number of rows in the lateral direction according to the number of driven motors.

In this way, the existing motor control panel sets the number of motors dedicated to each control unit, which is made in the form of a module, and checks, replaces, or repairs the required motors of all motors individually in a state where the operation of the entire motor control panel is not stopped It is a trend that is being made to do.

However, in the conventional motor control panel, modularized control units are fixedly installed in a single enclosure in a laminated form. However, when it is necessary to check or repair each control unit, the front of the control unit is opened, The power supply unit and the MCCB must be disconnected, and then the hand or the tool must be inserted into the inside of the enclosure to perform the operation.

That is, in the case of the conventional motor control panel and the improved motor control panel of the improved structure, the front surface of the single-body enclosure 100 is opened as shown in FIG. 2, and the control unit The door 110 is divided into a plurality of doors 110 and 110 'and doors 110 and 110' are opened and closed from the enclosure 100 or the control units 110 and 110 ' 111 ') are mounted.

Accordingly, when the individual control units 110 and 110 'are required to be inspected or repaired, a hand or a tool or the like is inserted into the enclosure 100 while the doors 111 and 111' are opened, Or when the control part is to be replaced, the control unit 110 or 110 'is completely disconnected from the enclosure 100 and is taken out to perform the operation.

Therefore, in this work process, the operator frequently experiences safety accidents due to exposure of the high-voltage power source, and since the mutual engagement state must be released even in the process of separating the control unit from the enclosure, the bolts and nuts are loosely released In the case of the connection terminal and the power supply unit, the worker must directly release the connection state between the hands. This poses a problem that the operation risk is extremely high and the working time is considerably long.

In particular, although the existing control unit is made in a modularized state, only the MCCB and some control parts are modularized in the control unit, while the car disposal and connection terminals are fixedly installed on the inner side of the enclosure. Even if it is completely separated from the enclosure, it is still dangerous for the control part of the built-in control part. Since a large number of control parts, connection terminals and cables are located in the space inside the control unit and the enclosure, It has a structural contradiction that must be produced.

SUMMARY OF THE INVENTION The present invention has been made in order to solve the problems described above, and it is an object of the present invention to provide a control apparatus and a control method thereof, in which a tray which is repeatedly and repeatedly fixed upwardly and downwardly is formed inside an enclosure, Wherein the control unit comprises a front panel, a floor panel and a rear panel, wherein the control panel is provided with an operating part, and the floor panel is provided with a control panel As the components are arranged and the rear panel is configured so that the connecting parts are disposed,

The entire control unit is slid out from the enclosure by the pulling out of the front panel and the power supply unit and the connection terminal are short-circuited at the same time so that it can be safely checked or repaired and all the components for constituting the control unit are developed and exposed. The present invention provides an electric motor control panel to which a sliding-type protruding control unit having a feature of being able to downsize an electric motor control panel can be realized because the entire height of the enclosure can be remarkably reduced as all the control components are disposed using the floor panel. There is purpose.

According to an aspect of the present invention, there is provided an electric motor control board having a control unit stacked on an inner side of an enclosure having an open front, And a main busbar is disposed between the trays on the inner side of the enclosure. The control unit includes a front panel, a floor panel, and a rear panel, And a control part is fixedly formed on the floor panel and a connecting part is fixedly formed on the rear panel and an MCCB interlocked with the main bus bar is fixed between the front panel and the floor panel,

And the control unit is slid from the tray and protrudes from the enclosure.

In the present invention, since all the control parts and the control parts and the connecting parts are formed in the control unit slidingly protruding from the enclosure, all parts of the control unit can be checked, replaced and repaired by only drawing out a single control unit The operation efficiency is excellent and the short circuit at the power supply part and the short circuit at the cable connection terminal are performed simultaneously with the withdrawal of the control unit so that the work can be performed very quickly and safely without requiring a separate short circuit for them, Since the power supply and the cable connection are made automatically by inserting the unit only, the restarting and the operation waiting time can be remarkably shortened. All the control parts are arranged on the control unit by using the floor panel, As for the so miniaturization it is possible with ease, as well as effective utilization of space on the installation site higher operational.

1 is an overall schematic view of a conventional motor control panel
Fig. 2 is a detailed view of a main portion of a conventional motor control panel
3 is an enlarged perspective view of a motor control panel according to the present invention.
FIG. 4 is a perspective view of a control unit taken out of a motor control board according to the present invention.
5 is an enlarged perspective view of the individual control unit in the motor control panel according to the present invention.
6 is a plan view of the individual control unit in the motor control panel according to the present invention.
Fig. 7 is a planar operation diagram of the individual control unit in the motor control panel according to the present invention. Fig.

The terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary meanings and the inventor may properly define the concept of the term to describe its invention in the best possible way And should be construed in accordance with the principles and meanings and concepts consistent with the technical idea of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

4 is an enlarged perspective view of the control unit of the motor control panel according to the present invention. FIG. 5 is an enlarged perspective view of the individual control unit in the motor control panel according to the present invention. FIG. 6 is a plan view of the individual control unit in the motor control panel according to the present invention, and FIG. 7 is a plan view of the individual control unit in the motor control panel according to the present invention.

As shown in the drawing, the motor control panel according to the present invention has individual control units 10 and 10 'coupled to each other in a stacked manner in an upper and a lower portion of a box-shaped enclosure 100 having a front surface opened.

At this time, trays 101 and 101 'are repeatedly formed at predetermined intervals in the upper and lower portions of the enclosure 100. The control unit 10 is disposed above the trays 101 and 101' The tray 10 'can be positioned and moved out of the enclosure 100 using the trays 101 and 101'.

The main bus bar 102 is mounted on the inner side surface of the enclosure 100 at positions corresponding to the positions between the trays 101 and 101 ' And a connector 103 (see FIG. 1) for exposing the outer surface of the enclosure 100 to the outer surface of the enclosure 100 is provided at the rear inner surface of the enclosure 100 103 ', and is connected to a desk panel installed in a central control room and a local panel installed in a plurality of sites through wiring connected to the connectors 103, 103'.

Particularly, the control units 10 and 10 'include a front panel 20 exposed to the front of the enclosure 100 and a floor panel 30 positioned above the trays 101 and 101' And a rear panel 40 facing the rear side of the enclosure 100. The front panel 20 is provided with a plurality of operating parts 21 and 21 ' A plurality of control parts 31 and 31 'are mounted on the rear panel 40 and the control units 10 and 10' are mounted on a plurality of connecting parts 41 and 41 ' ) Is equipped with a signal for controlling the motor and parts of all the objects supplying the power.

Here, the above-mentioned operating parts 21 and 21 'may include a switch for controlling manual operation and auto operation of the control unit, a power forced on / off switch, and various numerical input parts. ) 31 'is a No Fuse Breaker (NFB); MC (Magnet Contactor); MPR (Motor Protection Relay): OCR (Over Current Relay) / EOCR (Electronic Over Current Relay).

The connection parts 41 and 41 'correspond to the components for interconnecting the connectors 103 and 103' of the enclosure 100 and the control parts 31 and 31 ' 41 'and the connectors 103, 103' are connected to each other by a plurality of cables, and the connecting parts 41, 41 'and the control parts 31, 31' And has a connecting structure that can be connected to or separated from each other by a force.

Particularly, the MCCB 50 fixedly installed using the rear surface of the front panel 20 and the top surface of the floor panel 30 functions as a circuit breaker for wiring, and is used as an operation handle of the MCCB 50 The MCCB 50 is supplied with power from the main bus bar 102 and supplies power to the control components 31 and 31 'through the front panel 20, And the setting and control of the control components 31 and 31 'are performed by the operating parts 21 and 21' connected to the control parts 31 and 31 ' And the connection parts 41 and 41 'connected to the connection parts 31 and 31' are provided with various signals and power.

At this time, the main busbar 102 and the MCCB 50 are connected by a separately provided connection clip 60. The connection clip 60 is directly connected to the MCCB 50, The clip terminal 61 protruding from the connection clip 60 faces the main bus bar 102.

When the control unit 10 or 10 'is fully inserted into the enclosure 100, the connection clip 60 is connected to the main bus bar 102 and the MCCB 50 The connection parts 41 and 41 'of the rear panel 40 are connected to the connectors 103 and 103' of the enclosure 100 while the connectors 103 and 103 ' 'And the front panel and the local panel connected to the signal and power supply.

At this time, the tray 101 'and the front panel 20 are connected between the bottom surface of the front panel 20 of the control unit 10' and the top surface of the tray 101 ' The control units 10 and 10 'are coupled to the sliding rails 70 and 70' from the trays 101 and 101 'by the sliding rails 70 and 70' It can be soft and fast.

Accordingly, the motor control panel of the present invention is constructed such that a plurality of control units 10 and 10 'are stacked in an upper and a lower stack form from a single enclosure 100, and each of the control units 10 and 10' The power is automatically short-circuited from the main busbar 102 in the process of withdrawing the control unit 10 (10 ') and the connector 103 (103') of the enclosure 100 The connecting parts 41 and 41 'are automatically disconnected from the connecting parts 103' so that there is no fear of electrical safety accidents.

In addition, the control units 10 and 10 'are provided with operating parts 21 and 21', control parts 31 and 31 'and connecting parts (not shown) for constituting the control units 10 and 10' 41 'are all mounted on the bottom panel 30 and are arranged in a line with respect to the floor panel 30, the control units 10 and 10' are manufactured at a significantly lower height than the conventional control unit As a result, the height and size of the enclosure 100 can be greatly reduced. As a result, due to the miniaturization of the enclosure 100, the manufacturability as well as the space utilization for the installation site can be reduced It can be greatly increased.

In addition, when the control units 10 and 10 'are pulled out of the enclosure 100, all the accessories and parts included in the control units 10 and 10' are exposed. Therefore, The control unit 10 or 10 'can be easily and quickly repaired by inserting the control unit 10 or 10' into the enclosure 100 by inserting the control unit 10 or 10 ' Automatic connection and connection between the connector 103 (103 ') and the connecting parts 41 (41') are automatically performed. Therefore, it is difficult to directly separate or connect the cable connecting parts of various objects .

Accordingly, the motor control panel of the present invention improves the ease of manufacture through the structural improvement of the control units 10, 10 'and the enclosure 100, as well as the ease of use in terms of handling and management will be.

It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory and are intended to provide further explanation of the present invention as defined by the appended claims. Examples should be understood.

10, 10 ': control unit
20: Front panel 21, 21 ': Operation part
30: floor panel 31, 31 ': control part
40: rear panel 41, 41 ': connecting part
50: MCCB
60: connection clip 61: clip terminal
70, 70 ': sliding rail
100: enclosure 101, 101 ': tray
102: Main booth bar
103.103 ': Connector

Claims

A control unit (10, 10 ') repeatedly stacked on the inside of an enclosure (100) having a front surface opened,
The upper and lower trays 101 and 101 'are fixedly installed at predetermined intervals in the inside of the enclosure 100 and the inside of the enclosure 100 is provided between the trays 101 and 101' The main bus bar 102 is fixedly installed,
The control units 10 and 10 'are composed of a front panel 20, a floor panel 30 and a rear panel 40. The front panel 20 is provided with operating parts 21 and 21' The front panel 20 is formed with the control parts 31 and 31 'fixedly formed on the bottom panel 30 and the connecting parts 41 and 41' The MCCB 50 interlocked with the main busbar 102 is fixed between the floor panel 30 and the floor panel 30,
Wherein the control units (10) and (10 ') slide from the trays (101) and (101') and come out of the enclosure (100).

The method according to claim 1,
The tray 101 'and the floor panel 30 are configured to be engaged and fixed by the sliding rails 70 and 70' positioned therebetween and are controlled by the sliding rails 70 and 70 ' Wherein the control unit is configured to perform a smooth and stable projecting / demounting operation on the units (10) and (10 ').

The method according to claim 1,
The clip terminal 61 of the connection clip 60 protruding toward the main bus bar 102 is connected to the main bus bar 102 in accordance with the position of the MCCB 50, Wherein the control unit is configured to be connected to and disconnected from the bar 102 so that power to the MCCB 50 is automatically interrupted according to the flow of the control unit 10 or 10 ' The motor control panel is applied.

The method according to claim 1,
The connecting parts 41 and 41 'formed on the rear panel 40 of the respective control units 10 and 10' and the corresponding connectors 103 and 103 'are fixedly formed on the rear side of the enclosure 100, The connecting parts 41 and 41 'and the connectors 103 and 103' are automatically connected and disconnected according to the flow of the protruding and sinking of the control units 10 and 10 ' Control panel with motor control unit.