JPS6258841A - 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 comprises a plurality of unit devices in which main circuit devices for switching and protecting loads are grouped into unit circuits, which are housed in multiple stages in an outer box. Concerning the roll center to controller 1.

[Technical Background of the Invention] As is well known, a conventional control center includes an outer box 2 in which units 1 and chambers 1 are formed in multiple layers, and a main circuit device for opening/closing and protecting loads, as shown in FIG. A unit device 3 (magnetic contactor, circuit breaker, etc.) stored in the unit room 1 in a drawable manner for each unit circuit, and a window/Ia installed in the front opening of each unit room 1. 13 of
'i! /l, and is designed to perform main circuit opening/closing, start/stop control, monitoring, and protection operations for I11JJ machines, etc. Therefore, on the front of each unit device 3,
Three display operation devices 7 including indicator lights 6, etc. for indicating the operation status of the operation members 5 and 171 for the electromagnetic contactors 12j are installed, and this display operation device 7 can be used when the door 4 is open and closed. It is provided so that it can be viewed and operated through the window 4a. 7 [Problems in the Background Art] However, in the conventional control center described above, since the display operation device @ 7 is provided for each unit device 3, there are As the operability of the unit device 3 increases, it becomes difficult to confirm the displayed contents, which leads to problems such as not only is there a point of illumination, but also the task of replacing the indicator light 6 becomes difficult. Furthermore, since the unit devices 3 are separated from each other by the doors 4, if drip-proof and dust-proof structures are required, these structures must be applied to each unit device 3 individually, which is extremely uneconomical. be.

[Object of the Invention] The present invention has been made in view of the above-mentioned circumstances, and its object is to provide a plurality of display operation devices that are paired with each unit device in a state where they are separated from the unit device so that the front side of the outer box By centrally arranging multiple display and operating devices, it is possible to improve the visibility and operability of each display and operation device, and also to simplify the structure when adopting a drip-proof and dust-proof structure. Even though the display and operation devices are arranged centrally on the front side, the number of connection wires connecting each unit device and display and operation devices can be significantly reduced, resulting in the simplification of the overall structure. The aim is to provide a control center for the performance of the project.

[Summary of the Invention] In order to achieve the above object, the present invention includes a front door rotatably mounted on the front opening of an outer box formed of multi-tiered unit chambers for storing unit devices. By centrally arranging a plurality of display and operation devices each having a display means and an operation means for monitoring and operating the status of each unit device on this front door, the display and operation device's g
In addition to improving visibility and operability19, if a drip-proof and dust-proof structure is adopted, the structure will be improved only between the front door and the outer box.
In general, in order to send and receive signals etc. at each of the unit devices and display/operation devices in the pair, it is necessary to install a Install multiple common bus lines for transmitting signals, etc., and connect these common bus lines to each unit in the above pair! By using a configuration in which 17 devices and display operation devices are used in a time-sharing manner, each unit device and display operation device 4! ! The number of connection wires required to connect the devices can be significantly reduced, and the number of connection wires required can be reduced by providing a configuration in which power is supplied to at least each of the display and operation devices via the common bus bar. It will be further reduced! This is what I did to get it.

[Embodiment of the Invention] An embodiment of the present invention will be described below with reference to FIGS. 1 to 10.

First, in FIGS. 1 to 3 showing the mechanical configuration, 1
Reference numeral 1 designates an outer box having a vertically long rectangular shape. A front opening 11a is formed on the front side of the outer box, and a unit chamber 13 partitioned vertically by a number of shelf members 12 is arranged in multiple stages (this In the embodiment, it is formed in eight stages). Reference numeral 14 denotes, for example, eight unit devices that are housed in the respective unit chambers 13 in a drawable manner, and as shown in FIG. 3, these are circuit breakers 16. Main circuit equipment such as electromagnetic contactor 17 and main circuit disconnector 18. In addition to providing one control circuit disconnection section, a circuit board 20 is attached to, for example, the left side wall via a spacer 21, and a required number of lead wires 22a, for example, 14, are provided from this circuit board 20. First plug 22
has been derived. In addition, on the front side of the unit device 14, a security door 23 is provided with a side-opening structure via a hinge mechanism 24 to prevent hands or tools from easily touching the live parts and to prevent arc discharge. The security door 23 is provided with the operation handle 16 in its closed state.
A window portion 23a facing a is formed.

Now, on the outer box 11, a fixed panel 25 is fixed to the F section of the front opening 11a, and a ventilation panel 26 having a ventilation opening 26a at the lower part is fixed, and the space between each of these panels 25 and 26 is fixed to the outer box 11. There is one front fi in the open part of
27 is pivoted in a horizontally opening structure via a hinge mechanism 28 attached to the left edge of the front opening 11a. Although not specifically shown in the drawings, this front door 27 has a gasket 29 (see FIG. 2) attached around its back side for the purpose of dustproofing, and a locking mechanism for locking it in the closed state. Further, a total of eight display and operation devices 30, paired with each of the unit devices 14, are centrally arranged at a suitable height position, for example, in the middle portion. The display operating device 30 is provided with, for example, five indicator lights 31 for displaying the operating status, which are display means for monitoring the status of the unit @14, and the electromagnetic contact j11.
For example, five operation switches 32 are provided as operation means for performing operations such as 17 and the like. Furthermore, the back side of each of the display and operation devices 30 is exposed on the back side of the front door 27, and a portion of this back side near the hinge mechanism 28 is connected to the same lead wire 22a led out from the circuit board 20. A second plug 33 having a number (14) of lead wires 33a is led out. On the other hand, 34 is, for example, 14 common bus bars, and this common bus bar 34 is connected to the outer box 11.
A portion 34a attached to the front edge of the inner side of the left wall (a portion closer to the hinge mechanism 28) so as to extend vertically corresponding to each unit device 14, and a portion 34a attached to the rear side of the front door 27 closer to the hinge mechanism 28, corresponding to each unit device 14. A portion 34b attached to the portion so as to extend vertically corresponding to the display operation device 30, and each of these portions 34a.

A flexible transition section 34 located between the upper ends of 34b
It is composed of c. And this common bus line 3
4 on the outer box 11 side is provided with a first plug 35 that is close to and paired with the first plugs 22, of which there are eight in total. Stopper 2
3, wherein the lead wire 22a and the common bus bar 34 are connected one-to-one in the connected state of the wires 2 and 35;
Also, a portion 34b of the common bus bar 34 on the front door 27 side
is provided with a second connector 36 which is in close proximity to and pairs with the second connectors 33, which are eight in total, and when these connectors 33 and 36 are connected, the lead The line 33a and the common bus 34 are connected one-to-one. Note that in this embodiment, each display operation device 3
0 and the lead wire 338 are also connected via the auxiliary plug 37.

The electrical configuration is shown in FIGS. 4 to 9, and will be explained below. However, in the following explanation, in order to facilitate understanding, these divisions will be indicated by adding subscripts a to h to each of the eight unit devices 14 and display operation devices 30 in order from the top. I did it.

That is, in FIG. 4 showing the overall configuration, numeral 38 is a synchronization signal generation circuit provided inside the outer box 11, which is the fifth synchronization signal generation circuit.
As shown in the figure, it consists of a square wave oscillation circuit 40 incorporating a crystal oscillator 39, and sends its relatively high frequency oscillation output to one CLK line in the common bus 34 as a pulse-like synchronous signal.
Output as 43c.・11 is a counter circuit provided inside the outer box 11 so as to directly receive the synchronization signal SC, and as shown in FIG.
It consists of a 4-bit binary counter 42 that counts C and an AND circuit 43 that receives signals from a total of four output terminals of this binary counter 42.

Therefore, in this counter circuit 41, 2) every time the count value of the m counter 42 reaches a constant value "1111" (in other words, every time the synchronization signal SC is input for 16 pulses), the AND circuit 43 outputs is inverted to a high level signal, and the high level signal is the timing signal S.
t to one TIM line of the common bus 34. 44 is a power supply circuit also provided in the outer box 11, which, as shown in FIG. It consists of a full-wave rectifier circuit 46 and a smoothing capacitor 47 that rectify and smooth the secondary side output, and the smoothed output, that is, the low voltage DC output, is sent to two P lines (positive voltage side) and N line of the common bus 34. (Negative voltage side).

48 is each circuit board 2 in the intermediate device ff114a to 14h.
This is a timing circuit which is connected to the power supply circuit 44 as well as to receive the synchronization signal QSc from the CLK line and the timing circuit 3j from the TIM line. .This timing circuit 481, specifically, as shown in FIG.
It is composed of a 16-bit 1- shift register (only 8 bits are shown in the figure) consisting of a flip-flop 48a, a NAND circuit 48b, and an inverter 43c, and its data terminal DO and clock terminal CO are connected to the TIM line and CIK line, respectively. Connected. Therefore, in this timing circuit 48, every time the synchronization signal Sc is input,
The state in which the time division signal Sd having the same time width as the timing signal St is outputted from any one of the output line Qa of the first stage to the output line of the 16th stage (not shown) is sequentially shifted. become. In the timing circuit 48,
The first stage output line Qa to the eighth stage output line Qh are connected to the control line 49 via jumper terminals Ja to Jh, respectively, and in the timing circuit 48 in the unit device 14a, the jumper terminal Short-circuit Ja and similarly connect unit device 1.
In each timing circuit 48 in 4b to 14h, by selectively shorting the jumper terminals Jb to Jh, the timing circuit 48 connects the control line 49 to the control line 49 for each unit bag ff14a to 14h to which it belongs. The configuration is such that the time division signal Sd assigned at a unique timing is output.

Reference numeral 50 denotes a first transmitting/receiving device provided on each circuit board 20 in the unit devices 14a to 14h, which is installed so as to be supplied with power from the power supply circuit 44, respectively. It consists of a receiving circuit 52. Further, 53 is, for example, five (5)-couplers provided on the circuit board 20, and these are the input lines 51+ to 5 of the transmitting circuit 51.
1. The electromagnetic contactors 17. in the unit devices 1da to 14h are respectively interposed in the unit devices 1da to 14h. Overload relay, ground fault I! A command signal (high level signal) for driving the indicator lamp 31 outputted from each auxiliary contact of the three electric lamps (all not shown) is received and applied to the transmitting circuit 51. The -F auxiliary contact is turned on when the corresponding device is in operation, and gives the above-mentioned command signal to the light receiving side of the corresponding photocoupler 53.
Further, when the ho 1-coupler 53 receives the above command signal, it outputs the command signal to the corresponding lines 511 to 515. , 54 are, for example, five operation auxiliary relays provided on the circuit board 20, which connect the respective excitation coils 56a to the output lines 521 to 525 of the receiving circuit 52 and the negative output terminal of the power supply circuit 44, respectively. The auxiliary relays for the electromagnetic contactors 17 in the unit devices 14a to 14h are provided so as to be operated when a high level signal is output to the output lines 521 to 525 by intervening therein. , and reset other protection relays (none of which are shown). Specifically, as shown in FIG.
The other input terminal of each AND circuit 55 is connected to the control line 49, and the output terminal of each AND circuit 55 is connected to five of the common bus lines 34. It is connected to the D1 line to D5 line. Therefore, in this transmitting circuit 51,
The input lines 511 to 515 are enabled to operate only during the period when the hour/minute v1 signal Sd is output to the control line 49.
The output (command signal) is given to the D1 line to D5 line.

Further, the receiving circuit 52 specifically connects the five lines D6 to Dl within the common bus line 34, as shown in FIG. It is composed of an 8-bit latch circuit 56 (only 5 bits are shown in the figure) consisting of a D flip-flop 56a and an inverter 56b that receive the output from the line at each data terminal, and its enable terminal E is connected to the control line. 49
The output terminals of the first to fifth stages are connected to the output lines 521 to 52. are connected to each other. Therefore, this receiving circuit 52 is enabled to operate only during the period when the time division signal g'sd is output to the control line 49, and provides the outputs of the D6 line to D10 line to the output lines 521 to 525. , the state is maintained when the time division signal Sd is no longer output to the control line 49.

On the other hand, 57 is a timing circuit provided in each of the display and operation devices 308 to 30h, which is connected to the P line and the N line.
In addition to being supplied with power from the CL line, the synchronization signal Sc from the CL K line and the timing signal 3t from the TIM line
connected to receive. This timing circuit 5
7 has the same configuration as the timing circuit 48 (see FIG. 7), and in the timing circuit 57 in the display operating device 30a, jumper terminal Ja is short-circuited, and the timing circuit 57 in the display operating device 30a is short-circuited. Each timing circuit 57 in the devices 30b to 30h has a jumper terminal Jb-Jhe.
By selectively short-circuiting, a time-sharing signal is transmitted to the control line 58 at a unique timing that coincides with the timing circuit 48 in the corresponding unit device 148-14h for each display operation device 30a-30h to which it belongs. It is configured to output Sd. 59 is a display operation device 30
A second transmitting/receiving device provided at 8h to 30h, respectively,
This consists of a transmitting circuit 60 and a receiving circuit 61, which are provided to be supplied with power from the P line and the N line, respectively. Specifically, the transmitting circuit 60 has the same configuration as the transmitting circuit 51 (see FIG. 8), and each of the AND circuits 55 has one input terminal connected to the operating switch 32. The lines 601 to 60s are connected to the P line through each line, and the other input terminals are commonly connected to the control line 58, and the output terminal is D8.
It is connected to the line to DIG line. Therefore, when the operation switch 32 is turned on, the corresponding AND circuit 55
An operation signal (high level signal) is given to the control line 58, and the transmitting circuit 60 etc. sends a time-division signal Q to the control line 58.
It is enabled to operate only during the period when 3d is being output, and the operation signal is applied to the D6 line to the DIO line.

Further, the receiving circuit 61 has the same configuration as the receiving circuit 52 (see FIG. 9), and has an enable terminal E.
are connected to the control line 58, and output terminals of the first to fifth stages are output lines 611 to 6 with the indicator light 31 interposed therebetween].

The data terminals of the D flip-flop 56a are connected to the D1 line to the D5 line. Therefore, the receiving circuit 61
In this case, the control line 58 is enabled to operate only during the period when the time division signal Sd is output, and the outputs of the D1 line to D5 line are provided to the output lines 61+ to 615. It is turned on when output j of lines 611 to 615 becomes a high level signal.

Next, the operation of the above configuration will be explained with reference to the timing chart of FIG. 10. When each power supply circuit 44 is supplied with power, the output of that power supply circuit 44 is
48-14. Timing circuit 48 in h. Timing times ff157. in the first transmitting/receiving device 50 and the display operating devices 308 to 30h. The signal is applied to the second transmitting/receiving device 59 via the P line and the N line, thereby driving these devices. In addition, in this state, the synchronization signal generation circuit 3
8 and the counter circuit 41, and a pulse-like synchronization signal SC and a timing signal St as shown in FIGS. 10(a) and 10(b) are output from each at a relatively fast cycle. Then, the timing circuits 48 and 57 in the unit devices 14a to 14h and the display and operation devices 30a to 30h
As shown in FIGS. 10(C) to 10(j), first, for example, a time-sharing signal Sd is outputted from the first stage unit bag fJ14a and the display control device 30a, After this, each time the synchronization signal SC is input, the unit device 14 of the next stage is
b-14h1 The timing circuits 48.57 in the display operating devices 30b-30h output time-division signals Sd in time series. At this time, the timing circuit 49.57
Each of the jumper terminals Ja-Jh in the above is selectively assigned to the unit devices 14a to 14h1 and the display and operating devices 308 to 30h and is short-circuited. The first transmitting/receiving device 50 and the second transmitting/receiving device @5 whose functions are enabled are the intermediate device 1
48-14h9 The display operation device 30a-30h sequentially changes to an operable state at a relatively quick cycle. That is, for example, when the time-sharing signal Sd is input to the first transmitting/receiving device 50 in the unit bag ff1lda and the second transmitting/receiving device 58 in the display operation device 30a, the , each AND circuit 55 in the transmitting circuit 51 allows the command signal from the photocoupler 53 to pass only during the period when the time-division signal 3d is received, and at the same time, the latch circuit 56 in the receiving circuit 61 connects the enable terminal E to the In response to the signal @Sd, it becomes ready for operation, and as a result, command signals can be transmitted and received between the transmitting circuit 50 and the receiving circuit 61 only during the period when the time-division signal y3d is output. Also, between the transmitting circuit 60 and the receiving circuit 52, each AND circuit 55 in the transmitting circuit 60 allows the operation signal from the operating switch 31 to pass only during the period when the time-sharing signal 3d is received, and at the same time, the The latch circuit 56 receives the time-series signal Sd at the enable terminal E and changes its operable state to 9, and as a result, the operation is performed between the transmitting circuit 60 and the receiving circuit 52 only during the period when the time-divided signal Sd is output. It becomes possible to send and receive signals. In this way, the state in which transmission and reception is possible between the first transmitting/receiving device 50 and the second transmitting/receiving device 59 is possible for each of the unit devices 148 to 14h9 and the display operating devices 30a to 30h, depending on the output cycle of the time-sharing signal Sd. It will be sequentially switched to
In short, the common bus 34 is exclusively used at different timings by pairs of eight unit devices 148 to 14h and display and operation devices 308 to 30h.

According to this embodiment described above, the following effects can be expected.

(B) Since the display operation device 30 that pairs with each unit device 14 is centrally arranged at an appropriate height position on the front door 27, its operation and confirmation of display contents are restricted to the height position of the corresponding unit device 14. This can be easily done without causing any damage, and the replacement work of the indicator light 31 is also facilitated.

(['') One front prompt 2 is attached to the front opening 11a of the outer box 11.
7, so if drip-proof and dust-proof construction is required, install two gaskets on this one front door 27 and change the ventilation panel 26 to a structure without ventilation openings 26a. By simply doing this, all the unit devices 14 can be made drip-proof and dust-proof. Therefore, the structure is simpler and cheaper than in the past, which required these structures to be applied to each of the plurality of unit devices.

(c) Connecting lines necessary for transmitting and receiving signals between the plurality of unit bags @ 14 and the display operation device 30 are shared by the common bus 34, and the connection line from the power supply 144 to the display control device 30 is shared.
Since the configuration is such that power is also supplied via this common bus bar 34, the number of required connection lines can be significantly reduced, and the overall structure can be simplified and the assembly work efficiency can be improved accordingly. In addition, in this case, the outer box 11 and the front door 2
The number of connecting lines that cross between 7 and 7 will also be reduced, and the front
There is no possibility that the opening/closing of 5'I27 will be hindered.

(d) Common bus line 34, unit device 14 and display operation device 3
0 and the first connector 22, 35 and the second connector 33.
, 36, it is possible to improve the work efficiency when taking out and taking out the unit device 14 and replacing it, and when replacing the display operation device 39.

Moreover, in this case, this and the unit device 14 are connected to the common bus 34.
A first connector 35 provided to connect between this and the display operating device 30, and a second connector 33 provided to connect this and the display operating device 30 to the common bus bar 34 are connected to the corresponding unit devices. 14
and the display device 30, the lead wires 22a, 33a connecting them can be made to have a relatively short constant length, and the connecting portion including these lead wires 22a, 33a can be standardized. As a result, it is possible to improve manufacturability, reduce costs due to the interconnection effect, and improve maintainability.

In the above embodiment, a case where eight unit devices 14 and eight display operation devices 30 are provided is explained, but in this embodiment, the timing circuits 48 and 57 are constituted by 16-bit shift registers and are divided into 16. Since it is configured to generate the time-division signal Sd, up to 16 unit devices and display operation devices can be incorporated without making any changes to the electrical configuration. It is also possible to easily construct a double-sided controller 1 to a roll center with eight unit devices and a display/operation device provided on the back side. Of course, if the time division signal Sd is further subdivided, the common bus 34 can be shared by a larger number of unit devices 14 and display operation devices 30. Further, in the above embodiment, the timing circuit 48 and the first transmitting/receiving device 50 in the unit device 14 may be configured to be directly supplied with power from the power supply circuit 44.

[Effects of the Invention] As is clear from the above description, according to the present invention, the visibility and operability of the display operation device can be improved, and when a drip-proof and dust-proof structure is adopted, the structure can be made into an ellipse. Moreover, the required number of connection wires connecting a small number of unit devices and display operation devices can be significantly reduced, and the overall structure can be simplified and manufacturability can be improved.
This provides excellent effects such as simplifying the work of replacing unit devices and display/operation devices.

[Brief explanation of drawings]

1 to 10 show an embodiment of the present invention,
Figure 1 is the overall front view with the front door open, Figure 2 is the overall front view with the front door open.
The figure is a front view of the entire unit with the front door closed, Figure 3 is a schematic perspective view of the unit device, Figure 4 is a diagram showing the overall schematic electrical configuration, and Figure 5 is a synchronization signal generation 6 is an electric circuit diagram showing the power supply circuit, FIG. 7 is an electric circuit diagram showing the timing circuit, FIG. 8 is an electric circuit diagram showing the transmitting circuit, and FIG. 9 is an electric circuit diagram showing the circuit and counter circuit. An electric circuit diagram showing the receiving circuit and FIG. 10 are timing charts for explaining the operation. Moreover, FIG. 11 is a perspective view showing a conventional example. In the figure, 11 is an outer box, 11a is a curved opening, 13 is a unit chamber, 14 is a unit device, 16 is a wiring breaker (main circuit device), 17 is an electromagnetic contactor (main circuit device), and 20 is a circuit board, 22.35 is the first plug, 27 is the front door, 28 is the hinge mechanism, 29 is the seal, 30 is the display operating device, 3
1 is an indicator light (display means), 32 is an operation switch (operation means), 33.36 is a second plug, 34 is a common bus bar, 38
41 is a counter circuit, 44 is a power supply circuit, 48.57 is a timing circuit, 50 is a first transmitting/receiving device, 51 is a transmitting circuit, 52 is a receiving circuit, 53 is a photocoupler, and 54 is an operational aid. 59 is a second transmitting/receiving circuit, 60 is a transmitting circuit, and 61 is a receiving circuit. Applicant Toshiba Corporation Figure 1 Figure 2 Figure 3 Figure 8 Figure 9 (e) (4; (t) (5" (g) (-4) Figure 10

Claims (1)

[Claims] 1. An outer box that has a front opening and has unit chambers formed in multiple stages inside, and a plurality of unit devices that are housed in each of the unit chambers and have main circuit equipment, etc. for switching and protecting loads, organized into unit circuits. a front door pivotably mounted on the front opening of the outer box; and a front door centrally disposed on the front door to monitor and operate the status of each unit device. a plurality of display and operation devices each having a display means and an operation means for the operation, a plurality of common busbars installed near the pivot portion of the front door, and a plurality of common busbars connecting these and each of the unit devices to the common busbar; a first connector provided in the same manner as above, a second connector provided in the common bus line so as to connect this and each of the display operating devices, and a second connector provided in each of the unit devices and the display means. a first transmitting/receiving device that transmits a command signal for driving via the common bus and receives an operation signal from the operating means via the common bus; and the operating means provided in each of the display and operating devices. a second device that transmits an operation signal from the display unit via the common bus line and receives a command signal for driving the display unit via the common bus line;
a transmitting/receiving device; a timing circuit provided in each of the unit devices and the display operating device and generating a time-sharing signal assigned at a unique timing to each paired unit device and display operating device; a power supply circuit that supplies power to the display operating device via the common bus, and the first and second transmitting/receiving devices receive time-shared signals from timing circuits in the unit device and display operating device to which they belong, respectively. A control center configured to perform transmission and reception in synchronization.