JPH0245401B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a control unit of a power supply control device, particularly a power supply control device that is vertically stacked in multiple stages within a power supply control device for distributing power from a power source to each load, and disposed within the power supply control device. The present invention relates to a control unit of a power supply control device such as a control center that receives power supply from vertical power supply buses and controls loads.

This type of control unit is usually a hardwired circuit breaker,
It consists of a main circuit consisting of an electromagnetic switch and a thermal relay, and a control circuit that controls the main circuit equipment and operates, stops, and protects each load.

Hereinafter, a conventional example of the wiring configuration of each control unit of the control circuit will be explained, taking as an example a control center whose main target is an electric motor as a load. FIG. 1 shows a perspective view of a control center. In FIG. 1, a large number of control centers 10 are generally installed in a row. Each control center 10 has a unit compartment 14 in which control units 12 are housed in multiple stacks, a vertical wire compartment 16, a horizontal bus bar compartment 18, and a general terminal block compartment 20.

FIG. 2 shows an example of a circuit diagram of the control unit 12. In FIG. 2, a plug-in connector 22, a molded circuit breaker 24, an electromagnetic switch 26,
The thermal relay 28 and the control power supply transformer 30 constitute a main circuit. On the control circuit side connected between terminals 32X and 32Y of the control circuit power supply common to each control unit, there is a trip contact 28B of the thermal relay 28, a changeover switch 34 for switching the unit to either independent operation or linked operation, and a load switch. A push-button switch 36 with a lamp that also serves as the operation indicator lamp and the ON push button A contact during independent operation, and the load stop indicator lamp and the cut-off push button B during independent operation.
push button switch 38 with lamp that also serves as a contact point;
Electromagnetic switch 26 for maintaining the ON state during independent operation
, a failure electromagnetic relay 40 that attracts when the thermal relay 28 trips due to a load failure, a failure indicator lamp 42, and a B contact 26B of the electromagnetic switch 26. Terminals P1 and P2 are interlock operation command input terminals that are supplied from a central control device (not shown) when the changeover switch 34 is set to the interlock operation side, and a short circuit between these terminals P1 and P2 causes the electromagnetic switch 26 to operate. , the load is in an operating state, and the electromagnetic switch 26 is released by opening between the terminals P1 and P2, and the load is in a stopped state. 26A2 is the A contact of the electromagnetic switch 26, terminals P3 and P4 are output terminals to the central control device in the operating state of the load, 40A is the A contact of the faulty electromagnetic relay 40, and terminals P5 and P6 are to the central control device in the faulty state. This is the output terminal of

FIG. 3 shows the wiring configuration between each control unit of the control circuit, in which the same parts as in FIG. 1 are given the same reference numerals. In FIG. The terminals P1 to P6 of each control unit in FIG.
It is connected to the. The inter-panel wiring 48 is connected to the control center 10 from the general terminal block 46, either in a row or separately, and is connected to a central control device (not shown) that centrally controls each of the control units 12.

As mentioned above, the conventional type requires the vertical wiring 44 and the crossover wiring 48, and therefore has the following drawbacks.

It requires a lot of wiring work and takes a long time to deliver.

Generally, the number of crossover wirings 48 is enormous, so the wiring section and the general terminal block section 20 to which the general terminal block 46 is attached become large, and the unit section 2
4 cannot be wide.

When a control unit 12 is added or removed, it is necessary to add or remove vertical wiring 44 and crossover wiring 48 for the control unit, and this work is generally performed after the complete assembly. However, it was difficult to rearrange the lines in a narrow space.

The control circuit power supply for each control unit is often generated individually within each unit as shown in Figure 2, and therefore the output signal to the central control device must be a no-voltage signal. It was necessary to install an auxiliary relay within the unit, which increased the size of the unit.

The present invention has been made in view of the above-mentioned conventional problems, and its purpose is to provide a transmission station within each control unit for transmitting signals between the control units and between the control unit and a separately installed central control device. It is an object of the present invention to provide a control unit which eliminates the above-mentioned drawbacks of the conventional art by comprising: and a branch transmission line connecting the transmission station and a signal transmission bus line disposed within a power supply control device.

The present invention is vertically stacked in multiple stages within a power supply control device for distributing power from a power source to each load.
A control unit that receives power supply from vertical power supply buses disposed vertically within the power supply control device and that transmits power from the power supply to control the power supply to the corresponding loads, the control unit controlling the power supply in the control unit. A transmission station that accepts command signals for control operations, decodes them, and sends signals regarding the power distribution status of the control unit, and a signal transmission bus connected to this transmission station in the power supply control device. It is characterized by having a branch transmission line for transmitting signals, and transmitting signals to and from the central control device via the signal transmission bus.

Hereinafter, preferred embodiments of the present invention will be described based on the drawings. FIG. 4 shows a circuit diagram of the control unit of the present invention in which the same parts as in FIG. 2 are given the same reference numerals. In FIG. Transmission station 5
0 is connected, and a branch transmission line 52 is connected to the signal transmission station 50 and a signal transmission bus (not shown).

FIG. 5 shows the wiring configuration of the control unit of the present invention, in which the same parts as in FIG. This is a connection point provided in advance on the signal transmission bus 54 to the signal transmission bus 54. The signal transmission station 50 provided in the control unit connects to the signal transmission bus 54 via the connection point 56.
It is connected to the main circuit equipment and decodes the transmission signals from other control units and central control equipment to control the main circuit equipment. A crossover wiring 58 is used to connect the signal transmission buses and between the signal transmission buses and a central control device (not shown).

FIG. 6 is a cross-sectional plan view showing a specific embodiment of the control center 10, and FIG. 7 is a front view of the control unit 12 housed in the control center with the door open. In FIGS. 6 and 7, the control center 10 has corner columns 60 arranged at the four corners, and an intermediate column 62 arranged between the unit section 14 and the vertical wire section 16. Further, the vertical electric wire section 16 and the vertical busbar section 64 are separated by a vertical support frame 66, and the upper and lower ends of these columns 60, 62 and the vertical support frame 66 are connected by a horizontal frame 68. Guide rails 72 are formed at both ends of a partition plate 70 that separates the upper and lower parts of the control unit 12. Three phases (three lines) of the vertical power supply bus 74 having a substantially Z-shaped cross section are fixed within the vertical support frame 66 by an insulating support device (not shown).

Next, the configuration of the control unit 12 of the present invention including the signal transmission station 50 will be explained in detail with reference to FIGS.
Numeral 76 is a U-shaped unit case, and 78 is a front horizontal member on which a latch device (not shown) is disposed and which is also used as a drawer handle. 80 is an instrument mounting plate that divides the inside of the unit case into front and rear parts, 82
is a mounting rail provided on the outer surface of the unit case side plate 76a. A connector 84 for plug-in connection with the vertical power bus 74 and a control power transformer 30 are provided on the rear surface of the instrument mounting plate 80. A molded circuit breaker 24, an electromagnetic switch 26, a thermal relay 28, a signal transmission station 50, a unit terminal block 86, etc. are provided on the front surface of the equipment mounting plate 80. An operating handle device 88 and push button switches 36 and 38 with lamps are attached to the door 12a of the control unit 12 for operating the circuit breaker 24 from the outside. A main circuit cable 92 and a control circuit cable 94 are led from the vertical wire section 16 to the thermal relay 28 and the terminal block 86, respectively, through a gap 90 between the unit case side plate 76a and the lower partition plate 70. There is. Above cable 9
A signal transmission bus 54 is disposed on the side opposite to the lead-in side of the terminals 2 and 94, that is, on the left side of the control unit 12 in FIGS. Similarly to the above, the wiring is routed through the gap 90 between the side plate 76a and the partition plate 70.

FIG. 8 shows a connecting portion between the branch transmission line 52 and the signal transmission bus 54. As shown in FIG. A plug-in receptacle 52a is attached to the terminal of the branch transmission line 52, and the plug-in receptacle 52a is inserted through an opening 100 made in a lid 98 of an insulating case 96 that accommodates a plurality of signal transmission buses 54 in parallel. A tab 54a inserted into the insulating case 96 and formed on the signal transmission bus 54
It's stuck in.

According to the control unit of the present invention configured as described above, the following effects can be obtained.

Signal communication between each control unit or between each control unit and the central control device can be realized by signal transmission, and the conventional vertical wiring 44 and crossover wiring 48 are no longer necessary, and the number of wiring steps can be greatly reduced.

The length of the electric wires used for the conventional wiring 44, 48 varies, but the branch transmission line 52 according to the present invention has a constant length, so it can be easily manufactured.
Connection to the signal transmission bus 54 can also be made with a single touch.

Since the conventional general terminal block 46 and crossover wiring 48 are no longer necessary, the general terminal block section 20 can be made smaller, and the unit section 14 can be enlarged accordingly, so that the storage of control units can be increased.

Wiring changes due to the addition or removal of a control unit can be easily made using only the branch transmission line, without being affected by the wiring of other control units.

The terminals P1 to P6 in the control unit and auxiliary relays such as the failure electromagnetic relay 40 are no longer necessary, and the space in the control unit can be used effectively.

Although the embodiments of the present invention have been described above with respect to a control center, similar effects can be obtained even if the present invention is used in a fixed collective control panel of control units.

[Brief explanation of drawings]

Fig. 1 is a perspective view of the power supply control device, Fig. 2 is a conventional circuit diagram of the control unit, Fig. 3 is a wiring configuration diagram when the conventional control unit is used in the power supply control device of Fig. 1, and Fig. 4 is A circuit diagram of the control unit of the present invention, Fig. 5 is a wiring configuration diagram of the power supply control device when the control unit of the present invention is used, and Fig. 6 is an enlarged view of the power supply control device equipped with the control unit of the present invention taken along the line of Fig. 1. FIG. 7 is a front view of the control unit of the present invention, and FIG. 8 is a diagram showing the connection between the branch transmission line and the signal transmission bus of the control unit of the present invention. In each figure, the same members are given the same reference numerals, 10 is a control center, 12 is a control unit, 50 is
5 is a signal transmission station, 52 is a branch transmission line, 54 is a signal transmission bus, and 74 is a vertical power supply bus.

Claims (1)

[Scope of Claims] 1. The power source is vertically stacked in multiple stages within a power source control device for distributing power from the power source to each load, and is vertically arranged within the power source control device to transmit power from the power source. A control unit that individually receives power from a vertical power supply bus and controls the power supply to the corresponding loads, and receives and decodes command signals for power supply control operations in the control unit.
A transmission station that transmits a signal regarding the power distribution status of the control unit; and a branch transmission line that is connected to this transmission station and connects to a signal transmission bus in the power supply control device, and that transmits a signal through the signal transmission bus. A control unit for a power supply control device, characterized in that it performs signal transmission with a centralized control device.