JP2010259221A - Electronic apparatus for control center - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain an electronic apparatus for a control center by which the engagement state of connectors can be confirmed from the outside of a case of the electronic apparatus in which electronic parts and the connectors are housed. <P>SOLUTION: The electronic apparatus for the control center is housed in a control unit 5 of the control center 1 together with a main circuit apparatus for protecting the opening and closing of a load. In a protection control relay 9 being the electronic apparatus, the electronic parts are housed in both the cases 11, 12 of the electronic apparatus case 10 composed of the front surface case 11 and the backside case 12 which can be opened and closed by hinges 13, the first connector 21 is arranged on a switch substrate 20 of the front surface case 11, a second connector 22 fitted with the first connector 21 is arranged on a base substrate 14 at the side of the backside case 12, and an observation window 23 for confirming the engagement state of both the connectors 21, 22 is arranged at the front surface case 11 while both the cases 11, 12 are closed. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an electronic device incorporated in a control center that performs start-up control and protection of a motor used in a power plant or the like.

The control center is a device in which a main circuit switch, a protection device, a monitoring control device, and the like are collectively assembled into a closed casing. The interior of the housing is partitioned into a plurality of upper and lower stages to form a plurality of unit chambers. An opening / closing door is provided on the front surface of each unit chamber. When the opening / closing door is opened, a control unit is housed inside the opening so that the control unit can be pulled out from the front surface.
FIG. 5 shows an example of a control unit of a conventional control center. The figure shows the control unit pulled out from the unit room of the control center. The control unit 31 houses a main circuit device such as an electromagnetic switch and a transformer, as well as a circuit breaker 33 for ON / OFF switching of the main circuit power supply, inside a frame 32. Further, on the front side of the frame body 32, a small door 37 to which a panel mounting tool 36 such as an operation switch or a display lamp for displaying an operation status is attached is openable and closable. On the back side of the small door 37, electronic devices such as substrates and electronic components are accommodated in a case (see, for example, Patent Document 1).

JP-A-10-293601 (page 2-3, FIG. 1 and FIG. 3)

Since the control center is configured such that the control unit can be pulled out as described above, when maintenance / inspection of the equipment / parts accommodated in the control center is required, it can be carried out in units of the control unit. However, among the devices and parts constituting the control unit, those having a long life and those having a relatively short life are mixed. In recent years, since many electronic components have been used, some electronic components have a shorter life than circuit breakers, electromagnetic switches, and the like.
In the control unit of the control center as described in Patent Document 1 above, for example, the LED of the display housed inside the small door 37 corresponds to this. When replacing parts, open the control center door, open the small door 37, open the back case, replace the parts, connect the connector of the current-carrying part, return the case to the original, After closing, the procedure is to close the door of the unit room. At this time, when the case is closed, the fitting of the connector portion cannot be confirmed from the outside, so that there is a problem that the fitting state is insufficient and a connection failure may occur.

  The present invention has been made to solve the above problems, and to obtain an electronic device for a control center capable of confirming the fitting state of the connector from the outside of the electronic device case in which the electronic component and the connector are accommodated. With the goal.

  A control center electronic device according to the present invention is a control center electronic device housed in a control unit of a control center together with a main circuit device for opening / closing and protecting a load. An electronic device case composed of a case and a back case is configured to store electronic components, and the first connector of the electronic component stored in the front case is disposed on the substrate on the front case side. The second connector to be fitted is placed on the back case side substrate, and the front case is provided with a viewing window for confirming the fitting state of both connectors when both cases are closed. is there.

  According to the control center electronic device of the present invention, the electronic components are housed in both cases of the electronic device case including the front case and the back case, and the first connector arranged on the front case side and the rear case side are arranged. Because the front case is provided in the front case to check the mating state with the second connector, the connector mating state when the electronic device case is opened and closed by replacing electronic components Therefore, troubles due to poor connection of the connector portion can be prevented, and a highly reliable electronic device can be provided.

It is a partial front view of the control center by Embodiment 1 of this invention. It is a perspective view of the protection control relay which is an electronic device accommodated in the control unit of the control center of FIG. It is sectional drawing of the connector part seen from the arrow III-III direction of FIG. It is a bottom view of the protection control relay seen from the thick arrow direction of FIG. It is a perspective view of the control unit of the conventional control center.

Embodiment 1 FIG.
The control center electronic device according to the first embodiment will be described below with reference to the drawings.
First, the outline of the control center will be described with reference to FIG. In the control center 1, the interior of a vertically long casing 2 is divided into a plurality of parts in the vertical direction, and unit chambers 3 having openings on the front surface are formed in multiple stages. An opening / closing door 4 is provided at the front opening of each unit chamber 3 so that the unit chamber 3 can be opened and closed, and a control unit 5 is accommodated in the unit chamber 3 so as to be drawn out.

FIG. 1 is a front view of one stage in the unit chamber 3 provided in a plurality of stages, and shows a state in which the front opening / closing door 4 is opened and the internal control unit 5 is visible. In the frame 6 of the control unit 5, a circuit breaker 7 for turning on / off the main circuit power supply and a terminal block 8 for connecting the control line are arranged. Main circuit equipment such as transformers and control transformers are housed. Further, on the front side, along with the circuit breaker 7, a protection control relay 9 configured by housing electronic components such as an electronic relay and a CPU in a case is attached to the frame body 6. This protection control relay 9 corresponds to the electronic device of the present invention.
The opening / closing door 4 is provided with a window 4a in a portion corresponding to the operation handle portion of the circuit breaker 7 and a portion corresponding to the display portion of the protection control relay 9, and when the opening / closing door 4 is closed, the operation handle portion and the display portion are provided. Protrudes from the window 4a so that the operation handle can be operated from the outside and the display unit can be visually recognized.
The devices and parts accommodated in the control unit 5 vary depending on the load to be controlled by the control center 1 and the function of the unit, and FIG. 1 shows an example.

2 is a perspective view showing details of the protection control relay 9 shown in FIG. 1, and FIG. 3 is a cross-sectional view taken along line III-III in FIG. FIG. 4 is a bottom view of the protection control relay 9 as seen from the direction indicated by the thick arrow in FIG.
An electronic device case 10 constituting the protection control relay 9 includes a front case 11 and a back case 12, and both cases 11 and 12 are configured to be opened and closed by a hinge 13. FIG. 2 shows a state in which the front case 11 is opened. When the front case 11 is closed, the engagement claw 11a of the front case 11 is engaged with an engagement hole 12a provided in the back case 12 and fixed.

  A base substrate 14 is accommodated in the back case 12, and an electronic component 15 such as an IC for controlling a power supply circuit, an input circuit, a protection circuit, and the like is mounted on the base substrate 14 to control an electronic relay. It is composed. Further, on the front side of the base substrate 14, a display substrate 18 equipped with an LCD 16 and an LED 17 for displaying the operation status of the control target load of the control unit 5 is detachably attached. Moreover, the 2nd connector 22 fitted with the 1st connector 21 by the side of the front case 11 demonstrated below is provided.

  On the other hand, the front case 11 is formed with a see-through window 11b in a portion corresponding to the LCD 16 and the LED 17 which are display portions of the display substrate 18, and can be seen from the outside when the front case 11 is closed. The front case 11 is provided with a switch board 20 on which a switch unit 19 (see FIG. 1) such as a control switch and a mode switch that can be operated from the outside is mounted. The switch board 20 is provided with a first connector 21 for transmitting and receiving signals to the electronic components mounted on the switch board 20, and as shown in FIG. The base connector 14 on the 12th side is fitted and connected to the second connector 22 described above. A peephole 23 is formed in the front case 11 for confirming the fitting state of both the connectors 21 and 22 from the outside of the case.

  As shown in the bottom view of FIG. 4, a viewing window 23 is formed in the vicinity of the front case 11 where the first connector 21 is arranged, that is, in the case of the figure, on the side surface on the bottom side of the front case 11. ing. The viewing window 23 is formed by providing a rectangular hole in the front case 11 and covering the hole with a transparent plastic plate, for example, a transparent acrylic plate, for dust prevention. Since the point having the viewing window 23 is a feature of the present invention, the operation of the viewing window 23 will be described below.

In recent years, electronic control relays have also been developed, and electronic relays with various functions have been adopted. Electronic components used for this purpose are housed in a sealed electronic device case dedicated to electronic devices, separate from mechanical components such as circuit breakers and electromagnetic switches, to prevent electromagnetic noise, static electricity, dust and corrosion. Has been. Some of the housed electronic components have a relatively shorter life than mechanical components. For example, a liquid crystal display (LCD) or an LED. When the LCD reaches the end of its life, the display characters become thinner, and the visibility is degraded, such as part of the segments remaining disappeared. Therefore, such a relatively short-life electronic component is configured to be replaceable from the front side of the control center in a state where the control unit is housed in the unit chamber.
That is, in the case of the present embodiment, as described with reference to FIG. 2, the display board 18 on which the LCD 16 is mounted is detachably configured by being inserted into the connector, and is housed in the electronic device case 10 that can be opened and closed. Yes.

  To replace the display board 18, first, the operation handle of the circuit breaker 7 of the control unit 5 is turned to turn off the power, and the opening / closing door 4 on the front surface of the control unit 5 is opened. Next, the engagement of the engaging claws 11a of the front case 11 of the protection control relay 9 is released and the front case 11 is opened. Next, the display substrate 18 is separated and removed at the connector portion, and replaced with a new display substrate 18 that has been prepared. Since this operation is performed with the front case 11 opened, the fitting state of the connector portion of the display board 18 can be visually confirmed. When the replacement work is finished, the front case 11 is closed. At this time, the first connector 21 provided on the switch board 20 which is the connector of the electronic component on the front case 11 side is fitted with the second connector 22 provided on the base board 14 on the back case 12 side. It has become.

Since this replacement work is performed on a board-by-board basis, there is an advantage that it can be easily performed on the user side, but there is a backlash of the hinge 13 after the front case 11 is closed, and the cases 11 and 12 are completely tightened. If it is not disconnected, the connectors 21 and 22 cannot be sufficiently fitted together, which may result in poor connection. In order to prevent such problems, it is possible to observe and check whether the connectors 21 and 22 are sufficiently fitted from the viewing window 23 before energization.
After confirming the fitted state, the open / close door 4 of the control unit 5 is closed and the operation handle of the circuit breaker 7 is turned ON.

  In the above description, the display substrate 18 is described as an electronic component having a relatively short life. However, the switch substrate 20 on the front case 11 side is also frequently operated, so Become. After replacing the switch board 20 together with the board and closing both the cases 11 and 12 in the same procedure as described above, the fitting state of both the connectors 21 and 22 is confirmed from the viewing window 23 and checked.

  In the above description, the electronic device for the control center has been described as a protection control relay. However, the control center electronic device is not limited to the protection control relay. The electronic component on the front case side and the electronic component on the rear case side are connected to each other. It can be applied to all electronic devices that are connected by fitting.

  As described above, according to the control center electronic device of the first embodiment, the electronic device is configured by storing electronic components in both cases of the electronic device case including the front case and the back case that can be opened and closed by the hinge. The first connector for electronic components housed in the front case is arranged on the board on the front case side, the second connector to be fitted to the first connector is arranged on the board on the back case side, and both cases Since the front case is provided on the front case to check the mating state of both connectors when the connector is closed, the connector mating state can be Therefore, troubles due to poor connection of the connector portion can be prevented, and a highly reliable electronic device can be provided.

  In addition, since the electronic device is a protection control relay provided with an electronic relay for controlling the load and an LCD for displaying the load state, when the electronic device case is opened and closed in replacement work such as LDC having a relatively short life In addition, since the fitting state of the connector can be confirmed, it is possible to reliably provide a highly reliable electronic device by reliably performing the replacement work.

DESCRIPTION OF SYMBOLS 1 Control center 2 Case 3 Unit room 4 Opening / closing door 4a Window 5 Control unit 6 Frame 7 Circuit breaker 8 Terminal block 9 Protection control relay (electronic equipment)
DESCRIPTION OF SYMBOLS 10 Electronic device case 11 Front case 11a Engagement claw 11b Perspective window 12 Back surface case 12a Engagement hole 13 Hinge 14 Base board 15 Electronic component 16 LCD
17 LED 18 Display board 19 Switch part 20 Switch board 21 1st connector 22 2nd connector 23 Viewing window.

Claims (2)

In the control center electronic device housed in the control center control unit together with the main circuit device for opening / closing and protecting the load,
The electronic device is configured such that an electronic component is housed in both cases of an electronic device case including a front case and a back case that can be opened and closed by a hinge, and the first connector of the electronic component housed in the front case Is arranged on the board on the front case side, a second connector that fits with the first connector is arranged on the board on the back case side, and the two connectors are fitted in a state where the cases are closed. An electronic device for a control center, characterized in that a viewing window for confirming the state is provided in the front case. The control center electronic device according to claim 1,
The electronic equipment for a control center, wherein the electronic equipment is a protection control relay provided with an electronic relay for controlling the load and an LCD for displaying the state of the load.

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