KR101274398B1

KR101274398B1 - Control Center

Info

Publication number: KR101274398B1
Application number: KR1020107009880A
Authority: KR
Inventors: 도시히코 미야우치
Original assignee: 미쓰비시덴키 가부시키가이샤
Priority date: 2008-02-14
Filing date: 2008-06-09
Publication date: 2013-06-14
Also published as: JPWO2009101713A1; TW200935697A; JP4920087B2; CN101946379A; KR20100071094A; WO2009101713A1; TWI373184B

Abstract

A control unit 5 having a main circuit device for opening / closing and protecting a load and a protective control relay 8 can be pulled out of the unit chamber 3 having the open door 4 partitioned in the box body 2. In the housed control center, the protective control unit 8 is housed in a case consisting of a rear case 10 and a front case 11, which are arranged on the front side in the control unit 5 and configured to be opened and closed from the outside. Among the components of the protection control relay 8, the display substrate 16, which is an electronic component having a short lifespan, is detachably attached to the front side of the base substrate 13 in the case.

Description

Control Center {CONTROL CENTER}

The present invention relates to a control center that performs start control and protection of a motor used in a power plant and the like.

The control center is a device in which a main circuit switch, a protection device, a supervisory control mechanism, and the like are collectively assembled in a closed outer box.

5 and 6 show an example of a conventional control center. 5 is a perspective view of the control center, and FIG. 6 is a perspective view of the control unit. As shown in FIG. 5, the inside of the box body 31 of the control center is divided into a plurality of upper and lower stages to form a plurality of unit chambers, and an opening and closing door 32 is provided on the front of each unit chamber. have. In the unit chamber, the control unit 33 is freely stored from the front surface thereof.

6 is a control unit 33 in the extended state. As shown in the drawing, the control unit 33 accommodates main circuit devices such as an electronic switchgear and a transformer, as well as a circuit breaker for switching on / off of main circuit power in the frame body 34. On the front side of the panel, half mounting mechanisms 36, such as an operation switch and a display lamp for displaying the operation status, are disposed.

In the state where the control unit 33 is accommodated in the unit chamber of the box body 31, the opening / closing door 32 can be operated so that the operation handle of the breaker 35 and the semi-installation mechanism 36 can be monitored. ), A cutout window 32a is formed (see Patent Document 1, for example).

Patent Document 1: Japanese Patent Laid-Open No. 10-293601 (Second page 2-3, Fig. 1 and Fig. 3)

Since a control center is comprised as mentioned above, when the maintenance and inspection of an internal accommodating apparatus and components are needed, it can carry out by the control unit 33 unit. If a device or part in the control unit 33 malfunctions and is replaced, the front opening / closing door 32 is opened while the circuit breaker 35 of the control unit 33 is turned off. The unit 33 is taken out, the apparatus and parts are dismantled, replaced with a normal one, and then the control unit 33 is inserted into the unit chamber and stored.

By the way, among the apparatus and components which comprise a control unit, the thing of long life and a comparatively short thing are mixed. In recent years, since many electronic components are used, in particular, some electronic components have a short lifespan compared to a circuit breaker or an electronic switch. Therefore, the replacement work of the device and parts becomes a replacement frequency constrained to such short-life parts, and there is a problem that a replacement work that follows the above replacement procedure occurs each time, resulting in trouble.

In addition, in the operation of drawing out the control unit and dismantling the replacement device and parts, for example, a worker is dispatched from the manufacturer so as not to cause trouble in the operation of the control center due to a work miss. In many cases, it is difficult to perform the replacement operation by the user.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a control center that can easily replace a short-lived component among the components and components constituting the control unit.

A control center according to the present invention is a control center in which a control unit including a main circuit device for opening and closing a load and a protection control relay is housed in a unit chamber divided into multiple stages in a box body. Electronic components that are accommodated in a case that can be opened and closed from the outside of the box body and disposed in a control unit, and which have short lifespan among components constituting the protective control relay, are detachably mounted on the front side of the case.

According to the control center of the present invention, the protective control relay disposed in the control unit is housed in a case that can be opened and closed from the outside of the box body, and detachably attaches an electronic component having a short life span among the components to the front side of the case. Short replacement electronic components can be easily replaced from the outside of the control center, greatly reducing the replacement work time. For this reason, operation loss is reduced by shortening the apparatus downtime at the time of replacement, and a price reduction effect can be expected. In addition, the life of the control center can be easily extended.

1 is a partial front view of a control center according to Embodiment 1 of the present invention.
FIG. 2 is a perspective view of a protection control relay in a control unit housed in the control center of FIG. 1. FIG.
FIG. 3 is a sectional view seen from III-III of FIG. 2.
It is a figure explaining opening / closing of the whole case of a protection control relay.
5 is a perspective view showing a conventional control center.
6 is a perspective view of a control unit accommodated in the control center of FIG. 5.

Embodiment 1

1 is a partial front view of a control center according to Embodiment 1 of the present invention. Since the whole structure of a control center is the same as FIG. 5 demonstrated by the term of the background art, illustration and description are abbreviate | omitted. 1 corresponds to an enlarged portion of one of the control units 33 arranged in multiple stages of the control center shown in FIG. 5.

As for the control center 1, the inside of the box body 2 is divided in multiple numbers, and the unit chamber 3 which has an opening part in the front surface is formed in multiple stages. Opening and closing doors 4 are provided in the front openings of the unit chambers 3 so that the unit chambers 3 can be opened and closed. In the unit chambers 3, the control units 5 are retractable. . 1 is a view of one of the control units 5 provided in a plurality of stages viewed from the front with the opening / closing door 4 open, showing a state where the front portion of the control unit 5 housed therein is seen. Apparatus viewed from the front, comprising a control handle portion of a circuit breaker (7) for turning on / off a main circuit power supply, an electronic relay, an electronic component such as a CPU, a protective control relay (8) housed in a case, and a control line connection Although the terminal block 9 is shown in the figure, on the inner side thereof, a main circuit device such as an electronic switchgear and a control transformer and a control device such as a current sensor are arranged in the frame body 6 of the control unit 5. The support is fixed.

The opening / closing door 4 is provided with the window 4a in the part corresponding to the operation handle part of the circuit breaker 7, and the part corresponding to the display part of the protection control relay 8, and the opening / closing door 4 was closed. In this state, the operation handle can be operated from the outside and the display can be visually confirmed.

In addition, the control unit 5 is provided with a power grip (not shown) on the back side, and is configured to detachably hold a power supply busbar (not shown) disposed on the rear surface side of the box body 2. When the control unit 5 is taken out of the unit chamber 3, the power supply grip is released from the bus bar. Although drawing out the drawing control unit 5 is abbreviate | omitted, it will be in the state similar to FIG. 6 demonstrated by the term of the background art.

In addition, the equipment and parts accommodated in the control unit 5 differ depending on the load to be controlled and the function of the unit.

FIG. 2 is a perspective view showing the details of the protection control relay 8 shown in FIG. 1, and FIG. 3 is a sectional view seen from III-III of FIG. 2.

The case constituting the protective control relay 8 is composed of a back case 10 and a front case 11, and both cases are configured to be opened and closed by a hinge 12. In FIG. 2, the front case 11 is shown in an open state, and when the front case 11 is closed, the coupling ratchet portion 11a provided on the opposite side of the hinge 12 of the front case 11 is formed in the rear case 10. It is fixed in combination with).

The base case 13 is accommodated in the rear case 10, and the base substrate 13 is equipped with electronic components 14 such as an IC for controlling a CPU, a power supply circuit, an input circuit, a protection circuit, and the like. The relay is configured. In addition, on the front side of the base substrate 13, a display substrate 16 equipped with an LCD 15 for displaying the operation status of the control target load of the control unit 5 is detachably mounted. As shown in FIG. 3, the attachment and detachment is performed at the connectors 17 and 18 provided on the display substrate 16 side and the base substrate 13 side, respectively. 3A illustrates a state in which the front case 11 is closed because the display substrate 16 is mounted on the base substrate 13, and FIG. 3B opens the front case 11 to remove the display substrate 16. The process is shown.

The LCD 15 is equipped with a backlight (LED system) 15a for easy viewing from a distance. In addition, the display substrate 16 is provided with an LED display unit 20 for informing on, off, failure, error, and the like.

On the other hand, the front case 11 is provided with a viewing window 11b at a portion corresponding to the LCD 15 that is the display portion of the display substrate 16, and the LCD 15 is viewed from the outside when the front case 11 is closed. And the LED display unit 20 are visible. In addition, the front case 11 is provided with switch sections 19 such as control switches and mode switches that can be operated from the outside (see FIG. 1). And as shown in FIG. 2, the switch board | substrate 21 is arrange | positioned at the back surface side of the switch part 19 of the front case 11. As shown in FIG. The connector 22 is provided in the switch board 21, and when the front case 11 is closed, it is connected in connection with the connector 23 provided in the base board 13 on the back case 10 side. have.

In addition, the projection part 11c is provided in the part which opposes the display board 16 inside the front case 11, and when the front case 11 is closed, as shown in FIG. It is comprised so that the both side parts of the display board 16 may be lightly pressed by 11c. In this way, the display substrate 16 is supported at three points and can be fixed securely.

The protection control relay 8 configured as described above is attached to the front surface portion of the control unit 5 as follows. That is, as shown in FIG. 1, while the hinge 12 of the case is attached to the support member 24 provided to extend from the frame body 6 of the control unit 5, the side surface of the rear case 10 is provided. The attachment part 10b formed at one end is firmly tightened and fixed to the frame body 6 of the control unit 5 with a bolt or the like.

The protective control relay 8 mounted in this way occupies a large area with respect to the front opening of the control unit 5, thereby degrading workability during installation, inspection, and replacement of equipment and components on the inner side. .

4, the frame body 6 of the control unit 5 in the whole case of the protection control relay 8 (a state in which the back case 10 and the front case 11 are united). In order to open and close, the hinge 12 for opening and closing the front case 11 is shared with the hinge for opening and closing the frame body 6. That is, the hinge 12 part of the back case 10 and the front case 11 is couple | bonded with the support member 24 by one hinge pin 25. As shown in FIG. When the whole case is opened, opening and closing is enabled as shown by an arrow by releasing the bolt on the attaching part 10b side.

Next, in the control center 1 comprised as mentioned above, the replacement | work operation at the time of changing the control apparatus and components accommodated in the control unit 5 for failure or product life is demonstrated.

The control center is an opening / closing control device that opens and closes, controls, and protects by concentrating loads of a large number of electric motors and the like, and high reliability is required for long-term stable use. For this reason, the built-in control equipment and components are designed for long life, and are replaced with new ones on a regular basis or when there is a failure. The normal replacement operation is to turn off the breaker of the control unit to be replaced, open the open / close door on the front, draw out the control unit, remove the target device and parts, replace it with a new one, and then replace the control unit with the original unit room. It will be inserted into and restored.

However, among the control equipment and parts to be incorporated, there is a relatively short electronic component having a long product life, and therefore, a replacement cycle is shortened. Therefore, it is preferable that the electronic component having a short product lifetime can be replaced as simply as possible. For this reason, in this embodiment, it is made to replace the electronic component of short life among the components which comprise the protection control relay 8 easily, and this replacement operation is demonstrated below.

Among the components constituting the protection control relay 8, examples of the electronic components having a short lifespan include the LCD 15, the backlight (LED system) 15a, the LED display unit 20, and the like. In this embodiment, they are collected and mounted on the display substrate 16 which can be detached. So, below, the case where the display board 16 is replaced is demonstrated.

First, the power is turned off by turning the operation handle of the breaker 7 of the control unit 5 to be the target, and the opening / closing door 4 of the front of the control unit 5 is opened. Next, the front case 11 is opened by releasing the engagement of the coupling ratchet portion 11a of the front case 11 of the protection control relay 8. Next, as shown by a thick arrow in FIG. 3B, the display substrate 16 is removed from the connector 17 and 18, and the new display substrate 16 prepared is removed from the base substrate 13. Insert into the connector 18 on the side. Then, the front case 11 is closed, and the opening / closing door 4 on the front side of the control unit 5 is closed.

Thus, when the operation | work of replacing the display board 16 of the protection control relay 8 generate | occur | produces, it opens and closes from the exterior of the box body 2, without taking out the control unit 5 from the unit chamber 3; Since the replacement can be performed simply by opening the door 4 and the front case 11, the replacement work can be easily performed in a short time. Therefore, in the past, for example, a worker came out from a device manufacturer to perform a replacement work. However, since the replacement work can be easily performed by a user, the work time and price are greatly reduced, and the life of the device is greatly reduced. It can increase reliability.

In addition, conventionally, since LCD and LED were soldered to the base substrate 13, when replacement occurred, collective replacement was performed for every base substrate 13 on which they were mounted. By the way, in the case of batch replacement, the factor which reduces reliability increases easily. Because, as is generally known, the failure of the device has a high initial failure rate, the reliability of the device decreases as the replacement device parts increase due to the collective replacement. In addition, there is an increased chance of causing a work miss due to the replacement work (decreased contact reliability due to the connector replacement work, possibility of causing connection forgetting, etc.).

In addition, in the batch replacement for each base board 13, since the replacement of the CPU in charge of all functions and detachment of an I / O connector occur, the input / output sequence test which confirms that all functions operate correctly, and setting confirmation It is necessary to sufficiently check the soundness of the equipment, such as testing (it is necessary to confirm the set values of dozens of items), and a considerable time is required during the replacement work. In recent years, since there are many continuous operation plants, there is a tendency to shorten the possible plant downtime. If the downtime can be shortened, operating loss can be reduced and a large price reduction effect can be obtained.

In this embodiment, since only the display board 16 was exchangeable from the outside and replaced by the collective replacement, since the CPU replacement is not accompanied, the confirmation test after the replacement operation is not necessary, It is only confirmation of lighting indication and is completed in very short time. As described above, the shortening of the replacement time is more than the cost reduction effect by simply reducing the labor cost of the worker, and in practice, the price reduction effect by reducing the operating loss is much greater.

In the above description, among the components constituting the protection control relay, an electronic component having a short life is used as the display substrate 16 on which the LCD 15 with the backlight 15a or the LED display unit 20 are mounted. Although it demonstrated, it is not limited to this, It can apply to the general electronic component of short life compared with other component apparatus and components.

As described above, according to the control center of the present embodiment, the protective control relay disposed in the control unit is housed in a case that can be opened and closed from the outside of the box body, and the electronic component having a short life span among the components is placed on the front side of the case. By attaching to and detaching from an external device, the replacement of electronic components with short lifespans can be easily performed from the outside of the control center, and the replacement work time can be greatly reduced. For this reason, operation loss is reduced by shortening the apparatus downtime at the time of replacement, and a large price reduction effect can be acquired. In addition, the state of high reliability can be easily maintained, and the life of the control center can be extended.

In addition, among the components constituting the protective control relay, the electronic component having a short lifespan is a display board equipped with an LCD or the like for displaying the operation status of the load, thereby replacing the display substrate which plays an important role in displaying the operation status. Even if it is easy to implement, it is possible to easily provide a highly reliable control center.

The case accommodating the protective control relay includes a back case fixed to the frame body of the control unit, and a front case provided to be opened and closed by a hinge on the back case, and the display board is connected to the base board housed in the back case. By holding the connector freely detachable, the display board can be easily replaced by only opening the front case of the protective control relay from the outside of the box body.

In addition, the inside of the front case is provided with protrusions at positions opposite to the display substrate, and when the front case is closed, the display substrate is pressed and fixed to the protrusions so that the detachable display substrate can be reliably held and fixed in use. Therefore, the connection can be secured and high reliability can be maintained.

In addition, the entire case of the protective control relay can be configured to be opened and closed with respect to the frame body of the control unit, and the hinge for opening and closing the front case and the hinge for opening and closing the entire case can be used, thereby adding a simple configuration to the case. It is possible to provide a control center that allows easy assembly and replacement of equipment and components on the rear side.

1: control sensor 2: box body
3: unit room 4: opening and closing door
4a: Window 5: Control Unit
7: breaker 8: protection control relay
10: back side case 13: base board

Claims

In the control center in which the main unit and the control unit provided with the protection control relay for the opening and closing of a load, and a control unit are accommodated in the unit room divided | segmented in multiple stages within the box body,
The protection control relay is accommodated in a case openable from the outside of the box body and disposed in the control unit,
The case accommodating the protection control relay comprises a back case fixed to the frame body of the control unit, and a front case provided to be opened and closed with respect to the back case.
An electronic component having a short life span among the components constituting the protection control relay is detachably attached to the front side of the case.

The method according to claim 1,
The said electronic component with short lifespan is a control board which mounts the LCD which displays the operation state of the said load.

The method according to claim 2,
The display substrate is detachably held by a connector to a base substrate accommodated in the rear case.

The method according to claim 3,
The inside of the front case is provided with a projection at a position facing the display substrate, and when the front case is closed, the display substrate is configured to be pressed and fixed to the projection.

The method according to claim 3 or 4,
And a hinge for opening and closing the front case and a hinge for opening and closing the entire case, configured to open and close the entire case with respect to the frame body of the control unit.