CN203799255U - Control circuit of equipment control cabinet - Google Patents

Abstract

The utility model discloses a control circuit of an equipment control cabinet, belonging to the power distribution cabinet field. The control circuit of the equipment control cabinet solves the problem that the prior art can achieve basic equipment power supply control but cannot obtain the result of controlling the equipment. The control circuit of the equipment control cabinet comprises a power supply module, a switch module, a controller possessing a control signal input terminal and a feedback signal input terminal and a current sensor used for detecting that whether a load is working or not; the input terminal of the switch module is connected to the output terminal of the power supply module; the output terminal of the switch module is used for connecting to the power supply input terminal of the load; the control terminal of the switch module is connected to the output terminal of the controller; the current sensor is positioned on a circuit connected to the switch module and the load; and the output terminal of the current sensor is connected to the feedback signal input terminal of the controller. The control circuit of the equipment control cabinet can control the working state of equipment and can obtain the feedback of the working state of the equipment.

Description

A control circuit of an equipment control cabinet

technical field

The utility model belongs to the technical field of power distribution cabinets and relates to a control circuit of an equipment control cabinet.

Background technique

With the development of science and technology, a large number of intelligent control systems have been used in farms, farms, factories and other occasions. These intelligent control systems need to use power distribution control cabinets to control the corresponding equipment. The existing power distribution The control cabinet can realize basic equipment control, detect some environmental parameters, perform automatic control, and obtain some data that needs to be measured through various types of sensors.

For example, the patent No. CN201020668835.1 disclosed in the Chinese patent literature is a power distribution cabinet control device. The control device includes a main power supply and a backup power supply. The main power supply is connected to the electrical equipment through the first circuit breaker. The described The backup power supply is connected to the electrical equipment through the second circuit breaker, the main power supply is connected to the first circuit breaker through the control unit, the backup power supply is connected to the second circuit breaker through the control unit, and the control unit is connected to the main power supply, The detection of the power parameters of the backup power supply controls the opening and closing of the first circuit breaker and the second circuit breaker, so as to realize power supply to the equipment.

Although the power distribution cabinet control device can realize basic equipment power supply control, it cannot obtain the result of actually controlling the equipment, that is to say, it cannot know whether the equipment is in the working state of correct control, so it is also difficult to know whether the equipment or circuit Is there a fault in .

Contents of the invention

The utility model aims at the above-mentioned problems in the existing technology, and proposes a control circuit of the equipment control cabinet. The control circuit of the equipment control cabinet can control the working state of the equipment and can obtain the working state feedback of the equipment.

The utility model is realized through the following technical solutions: a control circuit of an equipment control cabinet, which is characterized in that the control circuit of the equipment control cabinet includes a power supply module, a switch module, a controller with a control signal input terminal and a feedback signal input terminal and A current sensor for detecting whether the load is working, the input end of the switch module is connected to the output end of the power module, the output end of the switch module is used to connect the power input end of the load, and the control end of the switch module is connected to the output of the controller terminal, the current sensor is arranged on the line connecting the switch module and the load, and the output terminal of the current sensor is connected to the feedback signal input terminal of the controller.

When the utility model works, a load is connected, where the load refers to electrical equipment. The power input end of the load is connected to the output end of the switch module. The controller controls the work of the load according to the signal input by its control signal input terminal. When the controller needs to control the load to work, the controller outputs the control signal to the switch module, and the switch module makes the power supply module and the load conduct. When the controller needs to control the load to stop working, the controller outputs a control signal to the switch module, and the switch module disconnects the circuit between the power module and the load. The current sensor detects the working state of the load and feeds it back to the controller. The controller judges whether the current load is in a normal control state to find out whether there is a fault in the circuit and upload it to the host computer. When the controller controls the load through the switch module and starts to work, the current sensor detects that there is current on the line connecting the switch module and the load. At this time, the current sensor outputs a current signal to the feedback signal input terminal of the controller. The controller judges that the circuit is normal, otherwise the current sensor Detecting that there is no current on the line connecting the switch module and the load, the controller judges that the circuit is faulty; when the load is not powered on, the current sensor detects that there is current on the line connecting the switch module and the load, and the current sensor outputs a current signal to the controller. The controller at the feedback signal input terminal of the device judges that the circuit is faulty, otherwise the circuit is normal.

In the above-mentioned control circuit of the equipment control cabinet, the switch module includes a relay one, a three-phase AC contactor and a leakage protection module one, and the contacts of the relay one are respectively connected to the output terminal of the power supply module and the input of the three-phase AC contactor The coil of the relay one is connected to the output terminal of the controller, the output terminal of the three-phase AC contactor is connected to the input terminal of the leakage protection module one, and the output terminal of the leakage protection module one is used to connect to the power input terminal of the load. Relay 1, three-phase AC contactor and leakage protection module correspond to the three-phase electric load connected to the three-phase power supply, and the power module includes three-phase power supply accordingly. Module one can control multiple three-phase electrical loads. The controller controls the contact closure and disconnection of the relay one to control the working state of the three-phase electric load. The leakage protection module protects the circuit so that the circuit operates normally.

In the above-mentioned control circuit of the equipment control cabinet, a manual switch 1 is connected in parallel at both ends of the contacts of the relay 1 . By setting the manual switch 1, the working state of the corresponding three-phase electric load can be manually controlled as required.

In the above-mentioned control circuit of the equipment control cabinet, a time relay 1 is connected in parallel at both ends of the contacts of the relay 1 . The time relay is a kind of relay whose output circuit needs to go through the specified accurate time to generate the contact action after adding or removing the input action signal. By setting the time relay one, when the controller fails, the time relay can be used for a certain time. Opening and closing the corresponding three-phase electric load makes the control circuit control mode of the control cabinet of this equipment more complete.

In the above-mentioned control circuit of the equipment control cabinet, the switch module includes a relay two and a leakage protection module two, the contacts of the relay two are respectively connected to the output end of the power supply module and the input end of the leakage protection module two, and the contacts of the second relay are connected to the input end of the leakage protection module two. The coil is connected to the output terminal of the controller, and the output terminal of leakage protection module 2 is used to connect to the power input terminal of the load. Relay 2 and leakage protection module 2 correspond to single-phase electric loads connected to single-phase power supply. The power supply module includes single-phase power supply accordingly. Multiple single-phase electric loads can be controlled by setting multiple relays 2 and leakage protection module 2. The controller controls the contact closure and disconnection of the second relay to control the working state of the single-phase electric load. Leakage protection module two protects the circuit so that the circuit operates normally.

In the above control circuit of the equipment control cabinet, the two ends of the contacts of the relay two are connected in parallel with the manual switch two. By setting the manual switch 2, the working state of the corresponding single-phase electric load can be manually controlled as required.

In the above-mentioned control circuit of the equipment control cabinet, a time relay 2 is connected in parallel at both ends of the contacts of the relay 2 . The time relay is a kind of relay whose output circuit needs to go through the specified accurate time to generate the contact action after adding or removing the input action signal. By setting the time relay 2, when the controller fails, it can be timed by the time relay 2. Opening and closing the corresponding single-phase electric load makes the control circuit control mode of the equipment control cabinet more complete.

Compared with the prior art, the control circuit of the equipment control cabinet has the following advantages:

1. The utility model is capable of timing control, automatic control, and manual control of the working state of the load, so as to better control the load work.

2. The utility model can detect the working state of the load and judge whether the current load is in a normal control state, so as to obtain whether there is a fault in the circuit.

Description of drawings

Fig. 1 is the structural representation of the utility model.

In the figure, 1. Controller; 2. Three-phase power supply; 3. Single-phase power supply; 4. Electric meter one; 5. Electric meter two; 6. Relay one; 7. Three-phase AC contactor; 8. Leakage protection module one; 9. Three-phase electric load; 10. Current sensor one; 11. Manual switch one; 12. Time relay one; 13. Relay two; 14. Leakage protection module two; 15. Single-phase electric load; 16. Current sensor two; 17. Manual switch 2; 18. Time relay 2.

Detailed ways

The following are specific embodiments of the utility model and in conjunction with the accompanying drawings, the technical solution of the utility model is further described, but the utility model is not limited to these embodiments.

As shown in FIG. 1 , a control circuit of an equipment control cabinet includes a power supply module, a switch module, a controller 1 with a control signal input terminal and a feedback signal input terminal, and a current sensor for detecting whether a load is working. The input end of the switch module is connected to the output end of the power module, the output end of the switch module is used to connect the power input end of the load, and the control end of the switch module is connected to the output end of the controller 1 . The current sensor is arranged on the line connecting the switch module and the load, and the output terminal of the current sensor is connected to the feedback signal input terminal of the controller 1 .

The switch module includes a relay one 6 , a three-phase AC contactor 7 and a leakage protection module one 8 . The contacts of relay one 6 are respectively connected to the output end of the power module and the input end of the three-phase AC contactor 7, the coil of relay one 6 is connected to the output end of the controller 1, and the output end of the three-phase AC contactor 7 is connected to the leakage protection module The input terminal of -8 and the output terminal of leakage protection module -8 are used to connect the power input terminal of the load. A manual switch 11 and a time relay 12 are connected in parallel at both ends of the contacts of the relay one 6 .

The switch module also includes a relay two 13 and a leakage protection module two 14, the contacts of the relay two 13 are respectively connected to the output of the power supply module and the input of the leakage protection module two 14, and the coil of the relay two 13 is connected to the output of the controller 1, The output terminal of the leakage protection module 2 14 is used to connect the power input terminal of the load, and the two ends of the contacts of the relay 13 are connected in parallel with a manual switch 2 17 and a time relay 2 18 .

The power supply module includes three-phase power supply 2, single-phase power supply 3, electric meter one 4 and electric meter two 5. The output end of the three-phase power supply 2 is connected to the input end of the ammeter-4, and the output end of the ammeter-4 is connected to a contact of the relay-6. The output terminal 3 of the single-phase power supply is connected to the input terminal 5 of the ammeter 2, and the output terminal 5 of the ammeter 2 is connected to a contact of the relay 2 13. In practice, only one three-phase power supply 2 may be provided, and the single-phase power supply 3 is formed by pulling out one phase from the three-phase power supply 2 .

The loads include a three-phase electric load 9 powered by three-phase electricity and a single-phase electric load 15 supplied by single-phase electricity.

The utility model can control single or multiple three-phase electric loads 9 powered by three-phase electricity. When controlling a single three-phase electric load 9, the three-phase electric loads 9 are correspondingly connected to the output terminal of the leakage protection module-8. That's it. When multiple three-phase electrical loads 9 need to be controlled, only a plurality of relays-6, three-phase AC contactors 7, leakage protection module-8, manual switch-11 and time relay-12 need to be set, and according to the above The corresponding connection method can be connected.

The utility model can control a single or multiple single-phase electric loads 15 powered by single-phase electricity. When controlling a single single-phase electric load 15, the single-phase electric load 15 is correspondingly connected to the output end of the leakage protection module 2 14 That's it. When it is necessary to control multiple single-phase electric loads 15, it is only necessary to set multiple relays 13, leakage protection module 2 14, manual switch 2 17 and time relay 2 18, and connect them according to the above-mentioned corresponding connection methods .

In this embodiment, a single three-phase electric load 9 and a single single-phase electric load 15 are controlled. What is shown in FIG. 1 is the connection structure when controlling a single three-phase electric load 9 and a single-phase electric load 15 . The current sensor is used to detect whether the load is working. In this embodiment, a current sensor is used to detect a load, so there are two current sensors, which are respectively a current sensor-10 for detecting the three-phase electric load 9 and a current for detecting the single-phase electric load 15 Sensor 2:16.

The following is the working principle of the utility model:

Control a single three-phase electric load 9 and a single single-phase electric load 15, connect the three-phase electric load 9 to the output terminal of leakage protection module one 8, and connect the single-phase electric load 15 to the output terminal of leakage protection module two 14, where the load Refers to electrical equipment. The controller 1 controls the work of the corresponding load according to the signal input from its control signal input terminal. The signal input to the controller 1 can be the signal fed back after the sensor detects, and the controller 1 generates a control signal according to the signal fed back by the sensor to control the corresponding load. , the controller 1 can regularly control the working state of the corresponding load.

When the controller 1 needs to control the three-phase electrical load 9 to work, the controller 1 outputs a control signal to the coil of the relay one 6, and the contact of the relay one 6 is closed so that the three-phase AC contactor 7 is also turned on. At this time, the three-phase power supply 2 conducts with the three-phase electric load 9, and the three-phase electric load 9 starts to work when it is powered on. When the controller 1 needs to control the three-phase electric load 9 to stop working, the controller 1 controls the contact of the relay-6 to disconnect. , at this time the three-phase load is powered off. The current sensor 10 detects the working state of the three-phase electric load 9 and feeds it back to the controller 1. The controller 1 judges whether the current load is in a normal control state to find out whether there is a fault in the circuit and upload it to the host computer.

Specific workflow: when the controller 1 controls the three-phase electric load 9 to work through the switch module, if the current sensor one 10 detects that there is current on the line connecting the leakage protection module one 8 and the three-phase electric load 9, then the current sensor one 10 Output the current signal to the feedback signal input terminal of the controller 1, and the controller 1 judges that the circuit is normal. Otherwise, if the current sensor-10 detects that there is no current on the line connecting the leakage protection module-8 and the three-phase electric load 9, the controller 1. Determining that the circuit is faulty; when the load is not powered on, the current sensor 10 detects that there is current on the line connecting the leakage protection module 8 and the three-phase electric load 9, and the current sensor 10 outputs a current signal to the controller 1 at this time The feedback signal input terminal controller 1 judges that the circuit is faulty, otherwise the circuit is normal.

When the controller 1 needs to control the single-phase electric load 15 to work, the controller 1 outputs a control signal to the coil of the relay two 13, and the contact of the relay two 13 is closed. When the single-phase electric load 15 is energized and starts to work, when the controller 1 needs to control the single-phase electric load 15 to stop working, the controller 1 controls the contact of the relay 2 13 to disconnect, and the single-phase load is powered off. The current sensor 2 16 detects the working state of the single-phase electric load 15 and feeds it back to the controller 1. The controller 1 judges whether the current load is in a normal control state to find out whether there is a fault in the circuit and upload it to the host computer.

Specific work flow: when the controller 1 controls the single-phase electric load 15 to work through the switch module, if the current sensor two 16 detects that there is current on the line connecting the leakage protection module two 14 and the single-phase electric load 15, then the current sensor two 16 Output the current signal to the feedback signal input end of the controller 1, and the controller 1 judges that the circuit is normal. Otherwise, if the current sensor 2 16 detects that there is no current on the line connecting the leakage protection module 2 14 and the single-phase electric load 15, the controller 1. Judging that the circuit is faulty; when the load is not powered on, the current sensor 16 detects that there is current on the line connecting the leakage protection module 14 and the single-phase electric load 15, and the current sensor 2 16 outputs a current signal to the controller 1 The feedback signal input terminal controller 1 judges that the circuit is faulty, otherwise the circuit is normal.

The operator can manually control the working state of the corresponding three-phase electric load 9 through the manual switch one 11 as required. The operator can switch on and off the three-phase electric load 9 at regular intervals when the controller 1 fails through the time relay one 12 . Therefore, the control circuit control mode of the equipment control cabinet is more complete. Similarly, the operator can manually control the working state of the corresponding single-phase electric load 15 through the manual switch 2 17 as needed, and the operator can control the single-phase electric load 15 through the time relay 2 18 when the controller 1 fails. Timed opening and closing.

The relay one 6 and the relay two 13 can also be connected with indicator lights respectively, and the corresponding indicator lights are on when the controller 1 sends a control signal to control its operation. The current sensor can also be connected with an indicator light, through which the working state of the current sensor can be indicated.

The utility model integrates the control modes of timing control, automatic control and manual control, can detect the working state of the load and judge whether the current load is in a normal control state, so as to obtain whether there is a fault in the circuit.

The specific embodiments described herein are only examples to illustrate the spirit of the present invention. Those skilled in the technical field to which the utility model belongs can make various modifications or supplements to the described specific embodiments or adopt similar methods to replace them, but they will not deviate from the spirit of the utility model or go beyond the appended claims defined range.

Although this paper uses a lot of controller 1, three-phase power supply 2, single-phase power supply 3, electric meter one 4, electric meter two 5, relay one 6, three-phase AC contactor 7, leakage protection module one 8, three-phase electric load 9. Current sensor one 10, manual switch one 11, time relay one 12, relay two 13, leakage protection module two 14, single-phase electric load 15, current sensor two 16, manual switch two 17, time relay two 18 and other terms, However, the possibility of using other terms is not excluded. These terms are only used to describe and explain the essence of the utility model more conveniently; interpreting them as any kind of additional limitation is contrary to the spirit of the utility model.

Claims (7)

1. the control circuit of an equipment control cabinet, it is characterized in that, the control circuit of this equipment control cabinet comprises power module, switch module, there is the controller (1) of control signal input end and feedback signal input end and the current sensor of whether working for detection of load, the input end of described switch module connects the output terminal of power module, the output terminal of switch module is for connecting the power input of load, the control end of described switch module connects the output terminal of controller (1), described current sensor is arranged on the circuit that switch module is connected with load, the output terminal of described current sensor connects the feedback signal input end of controller (1).

2. the control circuit of equipment control cabinet according to claim 1, it is characterized in that, switch module comprises relay one (6), three-phase ac contactor (7) and leakage protection module one (8), the contact of described relay one (6) connects respectively the output terminal of power module and the input end of three-phase ac contactor (7), the coil of described relay one (6) connects the output terminal of controller (1), the output terminal of described three-phase ac contactor (7) connects the input end of leakage protection module one (8), the output terminal of leakage protection module one (8) is for connecting the power input of load.

3. the control circuit of equipment control cabinet according to claim 2, is characterized in that, the two ends, contact of described relay one (6) are parallel with hand switch one (11).

4. according to the control circuit of the equipment control cabinet described in claim 2 or 3, it is characterized in that, the two ends, contact of described relay one (6) are parallel with the time relay one (12).

5. the control circuit of equipment control cabinet according to claim 2; it is characterized in that; switch module comprises relay two (13) and leakage protection module two (14); the contact of described relay two (13) connects respectively the output terminal of power module and the input end of leakage protection module two (14); the coil of described relay two (13) connects the output terminal of controller (1), and the output terminal of leakage protection module two (14) is for connecting the power input of load.

6. the control circuit of equipment control cabinet according to claim 5, is characterized in that, the two ends, contact of described relay two (13) are parallel with hand switch two (17).

7. according to the control circuit of the equipment control cabinet described in claim 5 or 6, it is characterized in that, the two ends, contact of described relay two (13) are parallel with the time relay two (18).