JPH1022U - Power control panel - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To simplify the assembling work by omitting a large number of control devices such as auxiliary relays and timers and complicated wiring.
Provided is a power control panel that facilitates maintenance and can easily respond to design changes. SOLUTION: Control units Cu1 to Cu5 having programmable controllers PC corresponding to respective motors M1 to M5 to be controlled are provided in the panel. The programmable controller PC is provided with a plurality of input / output terminals for connecting a power supply and a motor control device. Each programmable controller PC has a plurality of preset standard sequences, and a plurality of dip switches SW1 and SW for switching these standard sequences.
2, the combination of ON and OFF of the dip switches SW1 and SW2 is set so as to configure a sequence suitable for the control method of the corresponding motors M1 to M5.

Description

[Detailed description of the invention]

[0001]

[Industrial applications]

 The present invention relates to a power control panel for controlling a plurality of motors of a building facility or the like.

[0002]

[Prior art]

 In a conventional power control panel, a plurality of auxiliary relays, timers, and the like for controlling a motor are provided, and they are connected in a complicated manner. Therefore, maintenance is not easy. In general, installation of auxiliary relays, timers, etc. and their connection work are performed at the factory based on the design drawings provided in advance.However, design changes are often made. Therefore, the equipment and its connections must be changed. Changing equipment and connections on site requires a high level of knowledge and skill, and is a time-consuming and difficult task.

[0003]

[Problems to be solved by the invention]

 Therefore, the present invention simplifies the assembling work, simplifies maintenance, and easily responds to design changes by omitting a number of control devices such as auxiliary relays and timers and their complicated connections. The task is to provide a power control panel that can perform the control.

[0004]

[Means for Solving the Problems]

 In the present invention, in order to solve the above problems, control units Cu1 to Cu5 having programmable controllers PC corresponding to the respective motors M1 to M5 to be controlled are provided in the panel, and the power supply and motor control for the programmable controllers PC are provided. A plurality of input / output terminals for connecting the devices are provided, each programmable controller PC is provided with a plurality of preset standard sequences, and a plurality of dip switches SW1 for switching these standard sequences are provided. , SW2, and a combination of ON and OFF of the dip switches SW1 and SW2 is set so as to form a sequence suitable for the control method of the corresponding motors M1 to M5, respectively.

[0005]

[Action]

 In the power control panel of the present invention, one programmable controller PC is provided corresponding to one motor M1 to M5 to be controlled. Therefore, a plurality of programmable controllers PC are provided in the power control panel that controls the plurality of motors M1 to M5. These programmable controllers PC are the same, have a plurality of preset standard sequences, and have a plurality of dip switches SW1 and SW2 for switching these standard sequences. Therefore, the dip switches SW1 and SW2 of the corresponding programmable controllers PC are set so that a sequence conforming to the control method required for each motor is set, and the required power supply and equipment are connected to the input / output terminal 32. And assembled.

[0006]

[Embodiment of the invention]

 Drawings will be described using an example in which the present invention is applied to a power control panel of a building facility. FIG. 1 is a front view of a display unit group provided on a door of a control panel box, FIG. 2 is a front view of a control unit provided inside the control panel box, FIG. 3 is an explanatory view of a dip switch, and FIG. Fig. 5 and Fig. 10 show the motor control circuit using the control unit and the display unit according to the present invention, and the conventional motor control circuit equivalent to this. 5A is an exploded connection diagram of a first air conditioner motor according to the present invention, FIG. 5B is an exploded connection diagram of a conventional first air conditioner motor, and FIG. FIG. 6 (B) is an exploded connection diagram of a conventional electric room blower motor, and FIG. 7 (A) is an exploded connection diagram of an electric room blower motor according to the present invention. FIG. 7B shows a conventional electric room. FIG. 8 (A) is an exploded connection diagram of a second air conditioner motor according to the present invention, FIG. 8 (B) is an exploded connection diagram of a conventional second air conditioner motor, 9A is an exploded connection diagram of a drain pump motor according to the present invention, FIG. 9B is an exploded connection diagram of a conventional drain pump motor, and FIG. 10 is a system configuration diagram of a control unit and a display unit. .

In FIG. 1, five display units Du 1 to Du 5 are attached to a door D of a control panel box. Each of these display units is connected to a corresponding control unit Cu described later via a multiplex transmission line W. The display unit Du1 relates to the first air conditioner motor M1 shown in FIGS. 3 and 5, and includes a digital load current display device 1, two on / off pushbutton switches 2, 3, a failure alarm stop switch 4, , A buzzer 5. Each of the switches 2, 3, and 4 is provided with an LED indicator so as to be turned on during operation. The display unit Du2 is related to the electric room blower motor M2 shown in FIGS. 3 and 6, and includes a digital load current display device 6, four push-button switches 7, 8, 9, and 9 for stopping manual, off, automatic, and failure alarms. A buzzer 11 is provided. Each of the switches 7, 8, 9, and 10 is provided with an indicator light. The display unit Du3 relates to the electric room blower motor M3 shown in FIGS. 3 and 7, and has four digital push-button switches 13, 14, 1 for manual, off, interlocking, and failure alarm stop. 5, 16 and a buzzer 17 are provided. Each of the switches 13, 14, 15, 16 is provided with an indicator light. The display unit Du4 relates to the second air conditioner motor M4 shown in FIG. 3 and FIG. 8, and includes a digital load current display device 18 and six push buttons of hand, cut, far, failure alarm stop, on, and off. Switches 19, 20, 21, 22, 23, 24 and a buzzer 25 are provided. Each of the switches 19, 20, 21, 22, 23, and 24 is provided with an indicator light. The display unit Du5 relates to the drainage pump motor M5 shown in FIGS. 3 and 9, and includes a digital load current display device 26, and four push button switches 27, 28, and 29 for manual, off, automatic, and failure alarm stop. , 30, and a buzzer 31. Each of the switches 27, 28, 29, 30 is provided with an indicator light.

The control unit Cu shown in FIG. 2 is provided in the control panel box one by one corresponding to each of the motors M1 to M5. The control unit Cu has a built-in programmable controller PC, and has an input / output terminal block 32 and dip switches SW1 and SW2. The input / output terminal block 32 is for connecting a power supply and a motor control device to the programmable controller PC, and has five input terminals I0 to I4, five output terminals O0 to O4, a power input terminal POW, It has a device input terminal CT, a communication cable connection terminal SIG with the display unit Du, and a spare input / output terminal COM. Each programmable controller has a plurality of preset standard sequences. The dip switches SW1 and SW2 are used to switch the standard sequence of the programmable controller, and include eight switches 1-1 to 1-8 and 2-1 to 2-8 shown in FIG. 3, respectively. By switching these switches, the sequence of the programmable controller can be set as shown in the table below.

[Table 1]

[0009] The motors M1 to M5 of the building equipment controlled by the power control panel of this embodiment are connected as shown in the connection diagram of FIG. That is, magnet switches MS1 to MS5 are interposed between the motors M1 to M5 and the power supply, respectively, and the operation thereof controls the start and stop of the motors M1 to M5. Each load current is detected by the transformers CT1 to CT5, inputted to the display units Du1 to Du5 via the transformer input terminal CT and the programmable controller PC, digitized, and digitized to display the load current display devices 1, 6, 12, 18, 18, 26 is displayed. The first air conditioner motor M1 is controlled by a control circuit shown in FIG. 5A by applying the control unit Cu1 and the display unit Du1 in the control panel according to the present invention. The specific circuit configuration is equivalent to the control circuit using the conventional auxiliary relay shown in FIG. That is, in FIG. 5 (B), when the push button switch BS1 is turned on, the coil of the magnet switch MS1 is excited, the contact MS1a is closed and self-held, and the air conditioner motor M1 starts. MS 1b is a b contact of the magnet switch MS1, RL is a display lamp of a push button switch, GL is a turn-off display lamp, OL is a failure display lamp, Th is a thermal relay, 41 is an operation display relay coil of the monitoring panel 40, Reference numeral 42 denotes a failure display relay coil of the monitoring panel 40. The monitoring panel 40 is provided with a contact 41a of an operation display relay and a contact 42a of a failure display relay, and performs operation display and failure display. When the present invention is applied, as shown in FIG. 5 (A), necessary terminals POW, I0, I1, COM1, COM2, COM3, O0, O1, O2 of the control unit Cu1 are required. And the communication transmission line W connects the control unit Cu1 and the display unit Du1. Then, the switch 1-1 of the dip switch SW1 of the control unit Cu1 is turned on, and all others are set off. Thus, a sequence equivalent to that of FIG. 5B is obtained. Therefore, the motor M1 can be started and stopped by the push button switches 2 (BS1) and 3 (BS2) of the display unit Du1.

The electric room blower motor M2 is controlled by a control circuit shown in FIG. 6A by applying the control unit Cu2 and the display unit Du2 according to the present invention. The specific circuit configuration is equivalent to the control circuit using the conventional auxiliary relay shown in FIG. That is, in FIG. 6B, by switching the manual changeover switch COS1 and the automatic changeover switch COS2, whether the coil of the magnet switch MS2 is excited by the operation of the switch COS1 or by the operation of the contact C1 outside the panel. Is to be selected. MS2a is the a contact of the magnet switch MS2, MS2b is the b contact, RL is the indicator light of the push button switch, GL is the same indicator light, OL is the failure indicator lamp, Th is the thermal relay, and 51 is the monitor panel 50. The operation display relay coil 52 is a failure display relay coil of the monitoring panel 50. The monitoring panel 50 is provided with a contact 51a of an operation display relay and a contact 52a of a failure display relay to perform operation display and failure display. Therefore, when the present invention is applied, as shown in FIG. 6A, the terminals POW, I0, I1, I3, COM1, COM2, COM3, O0, O1, O2 of the control unit Cu2 are respectively connected. The necessary wiring is performed, and the control unit Cu2 and the display unit Du2 are connected by the communication transmission line W. Then, the switches 1-2 and 1-7 of the dip switches SW1 of the control unit Cu2 are turned on, and all others are set off. Thus, a sequence equivalent to that of FIG. 6B is obtained. Accordingly, the motor M2 can be started by the manual changeover switch 7 of the display unit Du2 and stopped by the disconnection switch 8 (COS1), and automatically operated by the automatic changeover switch 9 (COS2) to operate the external contact C1. To start and stop.

The electric room exhaust motor M3 is controlled by a control circuit shown in FIG. 7A by applying the control unit Cu3 and the display unit Du3 according to the present invention. The specific circuit configuration is equivalent to the control circuit using the conventional auxiliary relay shown in FIG. That is, in FIG. 7B, by switching the interlocking changeover switch COS4 and the manual changeover switch COS3, the excitation of the coil of the magnet switch MS3 is performed by the operation of the switch COS3, or the contact C2 that is linked to the blower motor M2. Is selected. MS3a is the a contact of the magnet switch MS3, MS3b is the b contact of the same, RL is the display lamp of the push button switch ON, GL is the cut-off display lamp, OL is the failure display lamp, Th is the thermal relay, and 61 is the operation display of the monitoring panel 60. Reference numeral 62 denotes a failure display relay coil of the monitoring panel 60. The monitoring panel 60 is provided with a contact 61a of an operation display relay and a contact 62a of a failure display relay, and performs operation display and failure display. When the present invention is applied, as shown in FIG. 7A, required terminals POW, I0, I1, COM1, COM2, COM3, O0, O1, O2 of the control unit Cu3 are respectively provided. Wiring is performed, and a communication transmission line W connects between the control unit Cu3 and the display unit Du3 and between the control unit Cu3 and the control unit Cu2. Then, the switches 1-2 and 1-6 of the dip switches SW1 of the control unit Cu3 are turned on, and all others are turned off. Thus, a sequence equivalent to that in FIG. 7B is obtained. Accordingly, the motor M3 can be started by the manual changeover switch 13 (COS3) of the display unit Du3 shown in FIG. 1 and stopped by the disconnection switch 14, and can be switched to the interlocked state by the interlocking switch 15 (COS4). By operating the interlocking contact C2, the motor can be started and stopped in conjunction with the blower motor M2.

The second air conditioner motor M4 is controlled by a control circuit shown in FIG. 8A by applying the control unit Cu4 and the display unit Du4 according to the present invention. The specific circuit configuration is equivalent to the control circuit using the conventional auxiliary relay shown in FIG. That is, in FIG. 8 (B), by exchanging the remote switch COS6 and the hand switch COS5, the coil of the magnet switch MS4 is excited by the operation of the push button switches BS3 and BS4, or the monitor panel 70 is not shown. Whether to operate the contacts CXa and TXb based on the operation of the ON / OFF pushbutton switch is selected. CX is a relay coil that operates when the on / off button switch of the monitoring panel 70 is on, TX is a relay coil that operates when the off / on button switch of the monitoring panel 70 is on, MS4b is a b contact of the magnet switch MS4, and RL is a push button. A switch-on display lamp, GL is a turn-off display lamp, OL is a failure display lamp, Th is a thermal relay, 71 is a relay coil for operation display of the monitoring panel 70, and 72 is a relay coil for failure display of the monitoring panel 70. The monitoring panel 70 is provided with a contact 71a of an operation display relay and a contact 72a of a failure display relay, and performs operation display and failure display. When the present invention is applied, as shown in FIG. 8 (A), each terminal POW, I0, I1, I3, I4, COM1, COM2, COM3, COM4, O0, O1 of each terminal of the control unit Cu4. , O2, O3, and O4, respectively, and the control unit Cu4 and the display unit Du4 are connected by a communication transmission line W. Then, the switches 1-1, 1-2, 1-4, and 2-8 of the dip switches SW1 of the control unit Cu4 are turned on, and all others are set to off. Thus, a sequence equivalent to that of FIG. 8B is obtained. Accordingly, the motor M3 is switched to the operation of the push-button switches 23 (BS3) and 24 (BS4) by the hand switch 19 (COS5) of the display unit Du4 shown in FIG. 1, and is started and stopped by these operations. . In addition, the remote control switch 20 (COS6) can be used to switch to the monitoring panel operation and start and stop with a signal from the monitoring panel. Further, it can be stopped by the disconnection switch 27.

The drain pump motor M5 is controlled by a control circuit shown in FIG. 9A by applying the control unit Cu5 and the display unit Du5 according to the present invention. The specific circuit configuration is equivalent to the control circuit using the conventional auxiliary relay shown in FIG. That is, in FIG. 9B, by switching the manual changeover switch COS7 and the automatic changeover switch COS8, the coil of the magnet switch MS5 is excited by the operation of the manual changeover switch COS7 or the operation of the liquid level relay contact C3. It is designed to select whether or not. WLR is a liquid level relay coil provided in the water tank, MS5a is a contact a of the magnet switch MS5, MS5b is a b contact thereof, RL is an operation display lamp, GL is a stop display lamp, OL is a failure display lamp, Th is a thermal relay, C4 is a liquid level relay contact, 81 is an operation display relay coil of the monitor panel 80, and 82 and 83 are failure display relay coils of the monitor panel 80. The monitoring panel 80 is provided with the operation display relay contacts 81a and 83a and the failure display relay contact 82a to perform operation display and failure display. Thus, when the present invention is applied, as shown in FIG. 9A, each terminal POW, I0, I1, I3, I4, COM2, COM3, COM4, O0, O1, O2 of each terminal of the control unit Cu5. , O3 are connected to each other, and the control unit Cu5 and the display unit Du5 are connected by the communication transmission line W. Then, the switch 2-1 of the dip switch SW1 of the control unit Cu5 is turned on, and all others are turned off. Thus, a sequence equivalent to that in FIG. 9B is obtained. Therefore, the motor M5 can be started by the manual changeover switch 27 of the display unit Du5 and can be stopped by the disconnection switch 28, and can be automatically switched by the automatic changeover switch 29 to start by the operation of the liquid level relay contact C3. Can be stopped.

The power control panel system according to the present invention is configured as shown in FIG. The control unit Cu has a built-in programmable controller PC, a dip switch input circuit 81, a DC input circuit 82, a DC output circuit 83, a voltage for converting the current value from the transformer CT into a voltage value, a current conversion circuit. 84, an analog input circuit 85 for inputting an analog current value, a communication circuit 86 for sending a digital communication signal from the programmable controller PC to the display unit Du or another control unit Cu via the transmission line W, A VR value input circuit 87 for setting a timer. The display unit Du has a built-in programmable controller PC2 to which a dip switch input circuit 91, an LED display circuit 92, a push button input circuit 93, a buzzer circuit 94, and a communication signal from the control unit Cu are transmitted via a transmission line W. And a communication circuit 95 for receiving. Thus, the control unit Cu in the panel and the display unit Du of the door are connected only by the multiplex transmission line W, and other electric wires are omitted. The control unit Cu and the display unit Du according to the present invention can be applied to configure a number of control circuits other than those described above.

[0015]

[Effect of the invention]

 As described above, in the present invention, the control units Cu1 to Cu5 having the programmable controllers PC corresponding to the respective motors M1 to M5 to be controlled are provided in the panel, and the power supply and the motor control for the programmable controllers PC are provided to the programmable controllers PC. A plurality of input / output terminals for connecting devices are provided, and each programmable controller PC has a plurality of preset standard sequences, and a plurality of dip switches SW1 for switching between these standard sequences. , SW2, and the power control panel by setting the combination of ON and OFF of the dip switches SW1 and SW2 so as to configure a sequence suitable for the control method of the corresponding motors M1 to M5. , Auxiliary relays, timers, and many other control devices and their Can be omitted sloppy connection, therefore, the assembling operation is simple, maintenance is easy, has the effect that Ru can easily cope with design changes.

[Brief description of the drawings]

FIG. 1 is a front view of a display unit group provided on a door of a control panel box.

FIG. 2 is a front view of a control unit provided inside a control panel box.

FIG. 3 is an explanatory diagram of a dip switch.

FIG. 4 is a single-line diagram of a motor for building equipment.

FIG. 5A is an exploded connection diagram of a first air conditioner motor according to the present invention, and FIG. 5B is an exploded connection diagram of a conventional first air conditioner motor.

6A is an exploded connection diagram of an electric room blower motor according to the present invention, and FIG. 6B is an exploded connection diagram of a conventional electric room blower motor.

7A is an exploded connection diagram of an electric room exhaust fan motor according to the present invention, and FIG. 7B is an exploded connection diagram of a conventional electric room exhaust motor.

FIG. 8A is a developed connection diagram of a second air conditioner motor according to the present invention, and FIG. 8B is a developed connection diagram of a second conventional air conditioner motor.

9 (A) is an exploded connection diagram of a drain pump motor according to the present invention, and FIG. 9 (B) is an exploded connection diagram of a conventional drain pump motor.

FIG. 10 is a system configuration diagram of a control unit and a display unit.

[Explanation of symbols]

 M1 First air conditioner motor M2 Electric room blower motor M3 Electric room exhaust fan motor M4 Second air conditioner motor M5 Drain pump motor PC Programmable controller Cu1 control unit Cu5 control unit Cu3 control unit Cu4 control unit Cu5 Control unit SW1 DIP switch SW2 DIP switch

Claims (2)

[Utility model registration claims] In a power control panel for controlling a plurality of motors, a programmable controller corresponding to each motor to be controlled is provided in the panel, and a plurality of power supply and motor control devices are connected to the programmable controller. An input / output terminal is provided, and each of the programmable controllers includes a plurality of preset standard sequences, includes a plurality of dip switches for switching these standard sequences, and is adapted to a corresponding motor control method. A power control panel, wherein a combination of ON and OFF of the dip switch is set so as to form a sequence. 2. A programmable controller in the panel is further connected to an instrument transformer provided in a load circuit, and converts an analog signal relating to a load current value from the instrument transformer into a digital signal. While providing an analog-digital conversion unit, the door of the switchboard is provided with a display unit corresponding to each motor, the display unit has a switch for controlling each motor,
A digital display device for load current is provided, and these switches and the display device for load current are connected to the programmable controller in the panel by a common communication transmission line, and the corresponding motors are controlled by the switches on the display unit. 2. The power control panel according to claim 1, wherein the load current is digitally displayed on a display device.