JPS62203505A - Control center - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a control center in which unit devices for controlling and protecting loads are housed in an outer box in multiple stages and can be taken in and out from the front and back.

[Technical Background of the Invention] Conventionally, this type of control center has been provided with a horizontal busbar and a vertical busbar that branches vertically from the horizontal busbar at the back inside the outer box, and several busbars on the front side of these busbar groups. Unit rooms separated by shelf boards are formed in multiple stages, and unit devices for controlling and protecting loads are housed in each unit room.

A power supply disconnector is provided on the back of the unit device, and a load disconnector and a control circuit plug are provided on the side. A wiring processing room is provided next to the unit room, and the load disconnector and control circuit plug of the unit device face the wiring processing room. A main circuit cable and an external control circuit cable are drawn into this wiring processing chamber, and these cables are connected to the load disconnector and control circuit plug of the unit device, respectively.

[Problems with the Background Art] In recent years, with the development of automatic control, it has been desired that this type of control center be capable of controlling a large number of small-capacity loads such as small electric motors and electric valves. To meet this demand, since only one load can be connected to one unit device, it is necessary to increase the number of unit devices housed within the outer box.

However, with the above configuration, the volume of the outer box is within the standard, and since the wiring processing chamber is provided on the side inside the outer box, it is not possible to secure a sufficient volume of the unit chamber. For this reason, there is a limit to the number of unit devices that can be stored. Furthermore, even if the unit devices are housed in multiple stages within the unit room, the number of main circuit cables and external control circuit cables increases accordingly, making it impossible to accommodate all of these cables in the wiring processing room. However, connecting these cables at the back side of the unit room is
Basolateral is not possible due to the arrangement of horizontal and vertical generatrix groups there.

[Purpose of the Invention] The present invention has been made in view of the above circumstances, and its purpose is to provide a control center that can control and maintain a large number of loads without causing difficulty in storing and connecting cables. It is on offer.

[Summary of the Invention] The present invention provides a wiring processing chamber in the rear side of the unit device in the outer box of the control center, and connects the fixed side and movable side of the plug device to the front surface of this wiring processing chamber and the rear surface of the first position device. Each connector is provided separately, and the main circuit cable and external control circuit cable are connected to the fixed side connector of this plug device.The conventional horizontal bus bar and vertical bus bar are eliminated, and the rear side of the unit device is wide. The feature is that not only a wiring processing room is secured, but also a large storage space for unit devices can be secured.

[Embodiment of the Invention] An embodiment of the present invention will be described below with reference to the drawings. First, FIGS. 4 to 6 showing the overall configuration of the control center will be described.

Reference numeral 1 denotes a vertically elongated outer box, and as shown in FIG. 5, the front half of the outer box 1 is divided by a number of shelf boards 2, and unit chambers 3 are formed in multiple stages below. In each unit room 3, unit devices 4 are housed in multiple stages so that they can be taken in and out back and forth, and a unit door 5 is provided on the front side. On the other hand, a wiring processing chamber 5 is formed in the rear half of the outer box 1 located behind the unit device 4, and a plug mounting plate 6 and a relay terminal block 7 for interconnecting external control circuits are provided here. is being used. The plug mounting plate 6 is located at the front of the wiring processing chamber 5,
A large number of units are installed so as to form pairs with each unit room 3. 1 to 3 show unit devices 4, and each unit device 4 houses, for example, a main circuit device 8 for two circuits and a monitoring/control device 9. The main circuit device 8 includes an electromagnetic contactor 10, an electromagnetic contactor 11, and an overcurrent relay 12, and the monitoring/control device 9 includes an auxiliary relay 13 and a fuse 14.
and an illuminated push button switch 15.

Reference numeral 16 denotes a plug device for connecting the unit device 4 to a power source, a load, and an external control circuit, and this plug device is composed of a fixed side connector 17 and a movable side connector 18. Fixed side connector 1
Reference numeral 7 is attached to the plug mounting plate 6 on the front side of the wiring processing room 5, that is, on the back side of the unit room 3, and is connected to the main circuit cable 19 connected to the power supply and load, and the external cable connected to the remote operation panel, relay panel, etc. An external control circuit cable 20 connected to the control circuit is connected. On the other hand, the movable connector 18
is arranged freely above the rear surface of the unit device 4. This movable side connector 18 is connected to the main circuit device 8 and the monitoring/control device 9, and when the pi position device 4 is stored in the unit room 3, it is connected to the fixed side connector 17 and pulled out from the unit room 3. It will be separated from this at some point. In addition, FIG. 7 shows a circuit diagram for one circuit of the (11th) device 4. In the figure, 21 is a negative 6:f motor circuit, which is connected to the unit via the main circuit cable 19 and the plug device 16. They are respectively connected to the electromagnetic contactors 10 and 11 in the device 4. 22° 23
and 24 are first to third external control circuits, which are connected to the fixed side connector 17 of the plug device 16 and the relay terminal 7a via the external control circuit cable 20. 25
and 26 are excitation coils of the electromagnetic contactors 10 and 11, which together with the contact groups 25a and 26a constitute a well-known interlock circuit.

According to this embodiment, the following effects can be obtained. That is, unlike the conventional case, since a horizontal busbar and a vertical busbar are not provided in the outer box, the wiring processing chamber 5 can be provided at the rear side of the unit device 4, and a wide space can be secured for the wiring processing chamber 5. Therefore, even if the number of loads is increased and the number of distribution circuit cables 19 and external control circuit cables 20 is increased, the connection work can be easily performed. In addition, since the wiring processing chamber 5 is provided at the rear side of the unit device 4, the outer box 1
All of the space in the front half of the building can be used as the unit room 3. This allows the unit device 4 to be inserted into the outer box 1.
The number of storage units can be increased, which in turn makes it possible to control and protect a large number of loads.

[Effects of the Invention] As described above, the present invention makes it possible to connect the main circuit cable and the external control circuit cable using a plug device in the wiring processing room provided at the rear side of the unit device. Moreover, a large space in the wiring processing room can be secured, and a large number of loads can be controlled and protected without causing difficulty in storing and connecting cables.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, Fig. 1 shows a unit device, Fig. 2 is a cross-sectional plan view taken along the line I-I, Fig. 2 is a partial front view, and Fig. 3 shows the main parts. 4 is a front view of the whole, FIG. 5 is a vertical sectional view, FIG. 6 is a rear view, and FIG. 7 is a circuit diagram. . In the drawing, 1 is an outer box, 4 is a unit device, 5 is a wiring processing room, 1
6 is a plug device, 17 is a fixed side connector, 18 is a movable side connector, 19 is a main circuit cable, 20 is an external control circuit cable, and 21 is a motor circuit (load). Applicant: Toshiba Corporation: Figure 3 Figure 4 Figure 5 Figure 6 Figure 7

Claims (1)

[Claims] 1. In an outer box in which unit devices for controlling and protecting the load are stored in multiple stages so that they can be taken in and out in the front and back, a wiring processing room is provided in the rear side of the unit devices in the outer box. A connector for the fixed side and a movable side of the plug device are provided in the front of the wiring processing room and the rear of the unit device, respectively, and the main circuit cable and the external control circuit cable are connected to the connector on the fixed side of the plug device. A control center characterized by: