KR20100064390A

KR20100064390A - Control center

Info

Publication number: KR20100064390A
Application number: KR1020107009881A
Authority: KR
Inventors: 도시히코 미야우치
Original assignee: 미쓰비시덴키 가부시키가이샤
Priority date: 2008-02-14
Filing date: 2008-06-09
Publication date: 2010-06-14
Also published as: JPWO2009101714A1; WO2009101714A1; JP4932009B2; TWI378618B; TW200935694A; CN101946380A

Abstract

A control unit 5 having a main circuit device for opening / closing and protecting a load, a protective control device, and a display unit 10 for displaying a load state is provided in a unit chamber 3 divided into casings 2 in a multi-stage manner. In the control center 1, which is housed and configured so that the display unit 10 can be visually recognized from the outside of the case body 2, the display unit 10 includes a liquid crystal display unit having a liquid crystal display element with a backlight. 12), and the backlight is configured to turn white when normal and turn orange when an abnormality occurs.

Description

Control Center {CONTROL CENTER}

BACKGROUND OF THE INVENTION 1. Field of the Invention 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, and more particularly, to a display unit for displaying a load state thereof.

The control center is a device in which the main circuit breaker, the protection device, and the supervisory control device are assembled together in a closed outer case.

4 is a perspective view illustrating an example of a conventional control center, and FIG. 5 is a perspective view of a control unit housed therein. As shown in FIG. 4, the inside of the case body 21 of the control center is divided into a plurality of upper and lower stages, and a plurality of unit chambers are formed, and an opening / closing door 22 is formed on the front surface of each unit chamber. ) Is installed. And the control unit 23 is accommodated in the unit room so that it can be pulled out from the front surface.

As shown in FIG. 5, the control unit 23 includes a main circuit device such as an electronic switch and a transformer, as well as a circuit breaker 25 for switching the main circuit power supply ON / OFF, inside the frame 24. On the front side of the frame 24, a supervisory control mechanism such as a display lamp 26 for displaying the operation status and an operation switch is arranged.

The control unit 23 is housed in the unit chamber of the case body 21 so that the operation handle of the breaker 25 can be operated, the display lamp 26 can be monitored and the operation switch can be operated. The incision 22a is formed in 22 (for example, refer patent document 1).

[Patent Document 1] Japanese Unexamined Patent Publication No. 10-293601 (Second page 2-3, Fig. 1 and Fig. 3)

Since the control unit 23 is required by the number of loads to be controlled, normally, as shown in FIG. 4, the control centers of plural surfaces are arranged in a row in a row, and depending on the scale, they are arranged in plural rows again. Is composed.

In the conventional control center as described above, when an abnormality occurs in the control target load, the operator is informed of the abnormality by lighting or flashing the display lamp 26 of the control unit 23. When the number of loads to be controlled is very large, the number of control units 23 of the control center becomes very large. Therefore, even if the display lamp 26 is turned on or flashes to inform an abnormality in any one of the control units 23, There is a problem that it is very difficult to immediately determine the control unit from the control unit 23.

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 determine a control unit that notifies a load abnormality among control units of a plurality of control centers.

In the control center according to the present invention, a control unit having a main circuit device for opening / closing and protecting a load, a protective control device, and a display unit for displaying a load state is housed in a unit room divided into casings in a casing body. In the control center configured to be visible from the outside of the case body, the display section includes a liquid crystal display element with a backlight, and is configured to change the color of the backlight in normal and abnormal conditions.

According to the control center of the present invention, the display unit of the control unit constituting the control center includes a liquid crystal display element with a backlight, and is configured to change the color of the backlight in normal and abnormal conditions, thereby causing an abnormality in the load to be controlled. In this case, the abnormally displayed control unit can be easily discriminated among the control units of the control center arranged in a large number, so that it is possible to quickly cope with an abnormal load.

1 is a partial front view showing a control center in Embodiment 1 of the present invention.
FIG. 2 is a diagram illustrating a display unit included in a control unit accommodated in the control center of FIG. 1.
3 is a diagram illustrating a liquid crystal display of FIG. 2.
4 is a perspective view showing a conventional control center.
5 is a perspective view of a control unit housed in the control center of FIG. 4.

BEST MODE FOR CARRYING OUT THE INVENTION [

Embodiment 1

1 is a partial front view of a control center according to Embodiment 1 of the present invention. The overall configuration of the control center is equivalent to FIG. 4 described in the background art, and the description and explanation are omitted. FIG. 1 corresponds to an enlarged portion of a control unit of a part of the interior arranged in multiple stages of the control center shown in FIG. 4.

In FIG. 1, the control center 1 is divided into a plurality of interiors of a case body 2 serving as an outer case, and a unit chamber 3 having an opening on its front surface is formed in multiple stages. Opening / closing doors 4 are provided in the front openings of the unit chambers 3 to open and close the unit chambers 3, and control units 5 are housed in the unit chambers 3 in such a manner that they can be pulled out. . The figure shows two stages of the control unit 5 housed in a plurality of stages, and the upper end shows a state where the front part of the control unit 5 housed inside the unit chamber 3 is opened by opening and closing the door 4. The lower part has shown the state which the opening-closing door 4 closed.

When the open / close door 4 is opened, it is a device which is visible from the front side, and is equipped with the operation handle 7a of the circuit breaker 7 which turns ON / OFF the main circuit power supply, and the electronic components, such as an electronic relay and a CPU, and the protection accommodated in the case. Although the control relay 8 and the terminal block 9 for control line connection are shown, inside these, the main circuit apparatuses, such as an electromagnetic switch and a control transformer, and protective control apparatuses, such as a current sensor, are shown. Is arranged, supported and fixed in the frame body 6, and the control unit 5 is comprised by these. However, the equipment and parts to be accommodated vary depending on the function of the load or the unit to be controlled. On the front side of the protective control relay 8, a display portion 10 for displaying the state of the load is provided.

When the opening / closing door 4 is closed, the operation handle 7a of the breaker 7 can be operated from the outside, and the operation handle 7a of the opening / closing door 4 can be visually recognized. The window 4a is opened in the portion corresponding to the display portion 10.

2 is an enlarged view of the display portion 10 and shows a portion seen from the outside of the opening / closing door 4.

The display unit 10 includes an LED display unit 11 for displaying an operation state such as operation, stop, failure, transmission error, etc., and a liquid crystal display unit for displaying main circuit current, trip current, error code, failure factor, etc. 12). The liquid crystal display portion 12 is composed of a liquid crystal display element 13 with a backlight.

In addition, although it consists of the switch part 14 in which the control switch and mode switches were arrange | positioned in the lower side of the display part 10, since it is not a main part of this invention, description is abbreviate | omitted.

FIG. 3 is a diagram illustrating details of the liquid crystal display 12 of FIG. 2. For example, the liquid crystal display 12 displays a large main circuit current value during normal operation, and displays a trip current value when an abnormality such as a trip occurs in the load.

The liquid crystal display element 13 adopts STN (Super Twisted Nematic) type. In addition, the contrast display by the liquid crystal display element 13 is a negative display in which the character portion 13a is a light display, and the background portion 13b other than the character portion is a dark display. have. In addition, the backlight has two colors, white and orange. (The character portion also includes a symbol and the like.)

In normal operation, the backlight is turned white and the character portion 13a is displayed in white by the transmitted light. At this time, the color of the background portion 13b other than the character portion is blue unique to the STN type, and appears to be light blue by the backlight.

When an abnormality occurs in the load and the signal is notified, the backlight is changed to orange, and the character portion 13a is displayed in bright orange color by the transmitted light. At this time, the colors of the background portion 13b other than the character portion are combined with blue and orange of the backlight to become a dark orange color with a blue color.

In addition, although the character part is shown by the segment system in FIG. 3, the dot matrix system may be sufficient.

Next, the effect | action of the display part 10 comprised as mentioned above is demonstrated.

As described with reference to FIG. 4 of the background art, the control center 1 includes a plurality of control centers arranged horizontally in a row. It is composed. In many cases, for example, those with ten or more planes in the transverse direction may be arranged beyond ten columns. Since the control unit 5 is housed in the casing 2 of each control center 1 in multiple stages, and the display unit 10 is provided for each control unit 5, a considerable number of display units 10 are provided. Are arranged neatly. At the time of the operation, the operator monitors the display unit 10 of each control unit 5 while circulating the passage between the control centers 1 arranged in the nirvana, and performs operation control of the load and maintenance and inspection.

If an abnormality occurs in the load, the display unit 10 of the control unit 5 notifies the abnormality. However, as described above, the control unit 5 displaying the abnormality among the many display units 10 is arranged. In order to find out quickly, it is desirable to be able to visually recognize the display unit as far as possible. In the conventional control center, an abnormality is mainly indicated by the blinking of the lamp of the LED display unit, but the LED display unit is a small point light source. It was difficult to quickly find an abnormal display of the display portion 10 of the control unit 5.

For this reason, in Embodiment 1 of this invention, the liquid crystal display part 12 was made into the liquid crystal display element 13 with a backlight, and the color of a backlight was changed and displayed at the time of abnormality. That is, when an abnormality occurs, the display unit 10 of the control unit 5 lights or flashes the fault lamp of the LED display unit 11, and the liquid crystal display unit 12 displays a trip current value, for example. It also switches the backlight from white to orange. By doing this, the worker can find out the control unit 5 in which the abnormality occurred among the many display parts 10, and can respond quickly.

Here, the STN type is adopted for the liquid crystal display element 13, the contrast display is made negative, and the color of the backlight is adopted as two colors of white and orange.

The control center is an opening / closing control device which concentrates loads of a large number of electric motors, and opens and closes, controls and protects, and high reliability is required so that it can be used stably for a long time. Therefore, since the liquid crystal display 12 must also have a long life and high reliability, for this reason, many TN (Twisted Nematic) types have been adopted in the liquid crystal display device for this reason. However, the TN type has a drawback that the viewing angle is narrow. There was this. When the display portion 10 of the deteriorated control center 1 is viewed from a remote place, the viewing angle of the liquid crystal display portion 12 is preferably as wide as possible.

Therefore, like the TN type, the STN type has a long service life and a wider viewing angle than the TN type. This makes it possible to obtain the display portion 10 that can be viewed from a distance while maintaining high reliability with a long lifespan.

In addition, as a result of various combinations of positive display, negative display and the color of the backlight, the negative display has better visibility even if the brightness of the surrounding environment is changed than the positive display, and the backlight is changed from white (normal). The combination changing to orange (abnormal) was found to have good visibility of the abnormal indication. That is, as a background color at the time of abnormal display, a composite color between the blue color of the STN type element and the orange color of the backlight is not discolored in color, and a high contrast can be obtained, and the background color of the display portion at normal display (light blue) We knew that we could distinguish well from).

Thus, by adopting the white and orange backlight, the character can be clearly recognized as a white character on a light blue background during normal operation, and a bright orange character on a dark orange background which is blue when an abnormality occurs. In particular, it is possible to clearly distinguish anomalies from a distance, especially when an anomaly occurs.

In addition, in the abnormal state, the orange backlight may not only light but also blink. Moreover, you may combine lighting and blinking, such as only blinking the character part 13a.

As mentioned above, according to the control center of Embodiment 1, the display part of the control unit which comprises a control center is provided with the liquid crystal display element with a backlight, and it controls so that a color of a backlight may be changed at the time of a normal and abnormal occurrence. When an abnormality occurs in the target load, the control unit in which the abnormality is displayed can be easily discriminated among the control units of the control center arranged in a large number, so that the abnormality of the load can be quickly dealt with.

In addition, since the liquid crystal display element is of the STN type, it has a wide viewing angle, so that abnormal display of the display portion can be distinguished from a distance, and has a long lifetime, thereby maintaining high reliability.

In addition, the contrast display of the liquid crystal display element is made by the display of the character portion and the negative display of the background of the character portion other than the dark portion, so that the visibility of the display portion at the time of abnormality is increased compared to the positive display, thereby providing a display portion that is easy to see. have.

Furthermore, the backlight has two colors, white and orange, and in normal operation, the backlight is turned white and the character portion is displayed in white, and when an abnormality occurs, the backlight is turned on in orange and the character portion is displayed in orange. The visibility of the display unit at the time of abnormality becomes high, and it becomes easy to discriminate abnormality display from a distance, and therefore it is possible to respond quickly to an abnormality.

Claims

A control unit having a main circuit device for opening / closing and protecting a load, a protective control device, and a display unit for displaying the state of the load is housed in a unit compartment divided into multiple stages in a case body, and the display unit is external to the case body. In a control center configured to be visually recognized by
The display unit includes a liquid crystal display device with a backlight, and is configured to change the color of the backlight in normal and abnormal conditions.

The method according to claim 1,
The control center of the liquid crystal display device, characterized in that the STN type.

The method according to claim 2,
The contrast display by said liquid crystal display element is a negative display which makes the character part light display and makes the background part other than a character part dark display.

The method according to claim 3,
The backlight has two kinds of colors: white and orange. In the normal state, the backlight is turned to white and the character portion is displayed in white. When the abnormality occurs, the backlight is turned to orange and the character portion is turned on. Control center, characterized in that configured to display in the orange.