Three-phase five-wire alternating current safety system

Abstract

The utility model discloses a three-phase five-wire alternating current safety system, which relates to the field of safety protection and comprises a phase sequence detection module used for detecting a three-phase phase sequence and outputting the three-phase phase sequence to a main control module; the error and omission detection module is used for detecting connection information of the ground wire, the zero line and the three-phase live wire and feeding back the connection information to the main control module; the LCD display module is used for receiving the control of the main control module and displaying the information of a three-phase live wire, a ground wire and a zero wire; the alarm module is used for receiving the control of the main control module and giving an alarm prompt; the main control module is used for comprehensively controlling the circuit to work; compared with the prior art, the beneficial effects of the utility model are that the wiring is simple, and only five incoming lines need to be connected and five outgoing lines need to be connected; after all operations are normal, the output control module delays and then supplies power to the rear stage; faults are clear, corresponding errors can be clearly displayed through the LCD display module, and timely feedback can be achieved through the alarm module.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of safety protection, specifically a three-phase five-wire alternating current safety system. BACKGROUND

[0002] 380V (three-phase five-wire, three live wires, one neutral wire, one ground wire) is used more frequently in factories, construction sites, etc. ; In the use of worker wiring, there are often ABC mistakes, ABC missed connections, or ground leakage, incorrect connections with neutral wire, incorrect connections with ground wire, etc. In motor application scenarios, there may be motor non-rotation, motor reverse rotation, motor jitter, etc. Such problems not only damage equipment, but also may cause equipment components to fly off, posing a risk to personal safety. In the case of leakage, ABC items connected to neutral wire and ground wire, incorrect connections, etc., there is a high-voltage electric shock hazard. When the human body comes into contact with such high voltage, the current will quickly pass through the body, causing serious electric shock injuries. The current of this voltage level is enough to cause cardiac arrest, respiratory arrest, and severe burns, and may even directly cause death.

[0003] In order to ensure equipment safety and prevent dangerous situations from occurring, it is necessary to detect safety hazards. SUMMARY

[0004] The utility model aims at providing a three-phase five-wire alternating current safety system to solve the problems raised in the background.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0006] A three-phase five-wire alternating current safety system, comprising:

[0007] A phase sequence detection module for detecting three-phase phase sequence and outputting to a main control module;

[0008] A mistake and omission detection module for detecting connection information of ground wire, neutral wire, and three-phase live wire and feeding back to the main control module;

[0009] An LCD display module for accepting control of the main control module and displaying information of three-phase live wire, ground wire, and neutral wire;

[0010] An alarm module for accepting control of the main control module and alarming;

[0011] An output control module for accepting control of the main control module, disconnecting the power supply circuit, and stopping power supply to the electrical load;

[0012] A main control module for comprehensively controlling the circuit operation;

[0013] The phase sequence detection module is connected with the main control module, the missing detection module is connected with the main control module, and the main control module is connected with an LCD display module, an alarm module and an output control module.

[0014] As a further scheme of the utility model: phase sequence detection module includes chip U3, the model of chip U3 is JZ8PSOP8, the 2nd pin of chip U3 is connected with the processing signal LU1X of firewire LU1 in turn through resistance R3, R9, the 3rd pin of chip U3 is connected with the processing signal LU2X of firewire LU2 in turn through resistance R10, R14, the 4th pin of chip U3 is connected with the processing signal LU3X of firewire LU3 in turn through resistance R15, R20, the 7th pin of chip U3 is connected with the first end of photoelectric coupler U4, the second end of photoelectric coupler U4 is grounded, the fourth end of photoelectric coupler U4 is connected with one end of resistance R21, main control module, the other end of resistance R21 is connected with voltage VCC, and the third end of photoelectric coupler U4 is grounded.

[0015] As a further scheme of the utility model: missing detection module includes photoelectric coupler U5, photoelectric coupler U7, photoelectric coupler U8, photoelectric coupler U9, photoelectric coupler U10, photoelectric coupler U12, photoelectric coupler U13, the first end of photoelectric coupler U5 is connected with firewire LU1 in turn through resistance R22, diode D16, the second end of photoelectric coupler U5 is connected with ground wire E, the third end of photoelectric coupler U5 is grounded, and the fourth end of photoelectric coupler U5 is connected with main control module.

[0016] The first end of photoelectric coupler U7 is connected with firewire LU2 in turn through resistance R23, diode D17, the second end of photoelectric coupler U7 is connected with ground wire E, the third end of photoelectric coupler U7 is grounded, and the fourth end of photoelectric coupler U7 is connected with main control module.

[0017] The first end of photoelectric coupler U9 is connected with firewire LU3 in turn through resistance R26, diode D19, the second end of photoelectric coupler U9 is connected with ground wire E, the third end of photoelectric coupler U9 is grounded, and the fourth end of photoelectric coupler U9 is connected with main control module.

[0018] The first end of photoelectric coupler U12 is connected with ground wire E in turn through resistance R28, diode D21, the second end of photoelectric coupler U12 is connected with zero wire N, the third end of photoelectric coupler U12 is grounded, and the fourth end of photoelectric coupler U12 is connected with main control module.

[0019] The first end of photoelectric coupler U8 is connected with firewire LU1 in turn through resistance R24, diode D18, the second end of photoelectric coupler U8 is connected with zero wire N, the third end of photoelectric coupler U8 is grounded, and the fourth end of photoelectric coupler U8 is connected with main control module.

[0020] The first end of photoelectric coupler U10 is connected with firewire LU2 in turn through resistance R27, diode D20, the second end of photoelectric coupler U10 is connected with zero wire N, the third end of photoelectric coupler U10 is grounded, and the fourth end of photoelectric coupler U10 is connected with main control module.

[0021] The first end of the optical coupling U13 is connected with the live wire LU3 through the resistor R29 and the diode D22 in sequence, the second end of the optical coupling U13 is connected with the neutral wire N, the third end of the optical coupling U13 is grounded, and the fourth end of the optical coupling U13 is connected with the main control module.

[0022] As a further scheme of the utility model: the alarm module includes a buzzer BUZ1, one end of the buzzer BUZ1 is connected with the voltage VCC, the second end of the buzzer BUZ1 is connected with one end of the resistor R18, and the other end of the resistor R18 is connected with the main control module.

[0023] As a further scheme of the utility model: the output control module includes three output control units, the output control unit includes a triode Q1 and a relay K1, the base of the triode Q1 is connected with the main control module through the resistor R6, the emitter of the triode Q1 is grounded, and the collector of the triode Q1 is connected with the voltage VDD.

[0024] Compared with the prior art, the utility model has the beneficial effects that: the utility model is simple in wiring, only needs to connect 5 input lines (LU1, LU2, LU3, E, N) and connect 5 output lines (the corresponding output lines of LU1, LU2, LU3, E, N) to achieve the purpose; it is safe to use, after everything is normal, the output control module is delayed to supply power to the rear stage; the fault is clear, the corresponding error can be displayed through the LCD display module, and the alarm module can be set to feedback in time. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is a schematic diagram of a three-phase five-wire alternating current safety system.

[0026] Figure 2 It is a circuit diagram of a phase sequence detection module.

[0027] Figure 3 It is a circuit diagram of a missing detection module.

[0028] Figure 4 It is a circuit diagram of an LCD display module.

[0029] Figure 5 It is a circuit diagram of an alarm module.

[0030] Figure 6 It is a circuit diagram of an output control module. DETAILED DESCRIPTION

[0031] Clearly and completely describe the technical scheme in the embodiments of the utility model with reference to the drawings in the embodiments of the utility model, apparently, the described embodiment is only a part of the embodiment of the utility model, but not all the embodiments, based on the embodiment in the utility model, all other embodiments obtained by the ordinary skill in the art without making creative labor belong to the range of protection of the utility model.

[0032] Please refer to Figure 1 A three-phase five-wire alternating current safety system, comprising:

[0033] Phase sequence detection module, for detecting three-phase sequence, output to the main control module;

[0034] Wrong and missing detection module, for detecting the connection information of ground wire, zero line and three-phase firewire, feedback to the main control module;

[0035] LCD display module, for accepting the control of the main control module, displaying the information of three-phase firewire, ground wire and zero line;

[0036] Alarm module, for accepting the control of the main control module, alarm prompt;

[0037] Output control module, for accepting the control of the main control module, disconnecting the power supply circuit and stopping the power supply for the power load;

[0038] Main control module, for comprehensive control of circuit work;

[0039] Phase sequence detection module connects the main control module, wrong and missing detection module connects the main control module, and the main control module connects the LCD display module, alarm module and output control module.

[0040] In the embodiment, please refer to Figure 2 The phase sequence detection module comprises a chip U3, the model number of the chip U3 is JZ8PSOP8, the No. 2 pin of the chip U3 is connected with the processing signal LU1X of the firewire LU1 through the resistors R3 and R9 in sequence, the No. 3 pin of the chip U3 is connected with the processing signal LU2X of the firewire LU2 through the resistors R10 and R14 in sequence, the No. 4 pin of the chip U3 is connected with the processing signal LU3X of the firewire LU3 through the resistors R15 and R20 in sequence, the No. 7 pin of the chip U3 is connected with the first end of the optocoupler U4, the second end of the optocoupler U4 is grounded, the fourth end of the optocoupler U4 is connected with one end of the resistor R21 and the main control module, the other end of the resistor R21 is connected with the voltage VCC, and the third end of the optocoupler U4 is grounded.

[0041] The three-phase (fire line LU1, LU2, LU3) phase difference 120 degree principle is used, the signal is fed back to the chip U3 after being reduced by two resistors, and is output to the main control module after being isolated by the optocoupler. The main control module judges whether the three-phase sequence is correct or not, and whether there is a three-phase missing.

[0042] In the embodiment, please refer to Figure 3 The error and missing detection module includes optocouplers U5, U7, U8, U9, U10, U12, and U13. The first end of the optocoupler U5 is connected to the fire line LU1 through the resistor R22 and the diode D16 in sequence, the second end of the optocoupler U5 is connected to the ground wire E, the third end of the optocoupler U5 is grounded, and the fourth end of the optocoupler U5 is connected to the main control module.

[0043] The first end of the optocoupler U7 is connected to the fire line LU2 through the resistor R23 and the diode D17 in sequence, the second end of the optocoupler U7 is connected to the ground wire E, the third end of the optocoupler U7 is grounded, and the fourth end of the optocoupler U7 is connected to the main control module.

[0044] The first end of the optocoupler U9 is connected to the fire line LU3 through the resistor R26 and the diode D19 in sequence, the second end of the optocoupler U9 is connected to the ground wire E, the third end of the optocoupler U9 is grounded, and the fourth end of the optocoupler U9 is connected to the main control module.

[0045] The first end of the optocoupler U12 is connected to the ground wire E through the resistor R28 and the diode D21 in sequence, the second end of the optocoupler U12 is connected to the zero line N, the third end of the optocoupler U12 is grounded, and the fourth end of the optocoupler U12 is connected to the main control module.

[0046] The first end of the optocoupler U8 is connected to the fire line LU1 through the resistor R24 and the diode D18 in sequence, the second end of the optocoupler U8 is connected to the zero line N, the third end of the optocoupler U8 is grounded, and the fourth end of the optocoupler U8 is connected to the main control module.

[0047] The first end of the optocoupler U10 is connected to the fire line LU2 through the resistor R27 and the diode D20 in sequence, the second end of the optocoupler U10 is connected to the zero line N, the third end of the optocoupler U10 is grounded, and the fourth end of the optocoupler U10 is connected to the main control module.

[0048] The first end of the optocoupler U13 is connected to the fire line LU3 through the resistor R29 and the diode D22 in sequence, the second end of the optocoupler U13 is connected to the zero line N, the third end of the optocoupler U13 is grounded, and the fourth end of the optocoupler U13 is connected to the main control module.

[0049] The strong and weak electric signals are isolated by the optocoupler to detect whether the ground wire E or the zero line N is missing, or whether the three-phase is incorrectly connected with the ground wire E or the zero line N. The main control module judges whether it is abnormal based on the feedback signals LU1 E, LU2 E, LU3 E, N E, LU1 N, LU2 N, and LU3 N.

[0050] Please see Figure 4 , the abnormal information detected by the master control module is fed back to the LCD display module, and the LCD mode is adopted for display, and the specific condition is displayed and processed in the Chinese character mode, which is more intuitive; when an error occurs, it is easy to see where the problem occurs, and it is not necessary to exclude them one by one, so that the relevant personnel can observe conveniently.

[0051] In the embodiment, please see Figure 5 , the alarm module comprises a buzzer BUZ1, one end of the buzzer BUZ1 is connected with the voltage VCC, the second end of the buzzer BUZ1 is connected with one end of a resistor R18, and the other end of the resistor R18 is connected with the master control module.

[0052] When the wiring is abnormal or fails, the signal BUZZ of the master control module becomes low, so that there is a voltage difference between the two ends of the buzzer BUZ1, and the buzzer BUZ1 buzzes to alarm.

[0053] In the embodiment, please see Figure 6 , the output control module comprises three output control units, and each output control unit comprises a triode Q1 and a relay K1; the base of the triode Q1 is connected with the master control module through the resistor R6, the emitter of the triode Q1 is connected with the ground, and the collector of the triode Q1 is connected with the voltage VDD.

[0054] When it is judged that the wiring is normal through the phase sequence detection module and the missing detection module, the control module outputs a high level to drive the triodes Q1, Q2 and Q3 to be turned on after a delay, the relays K1, K2 and K3 are powered on to work, the corresponding switches are closed, and three-phase alternating current is supplied.

[0055] When it is judged that the wiring is abnormal through the phase sequence detection module and the missing detection module, the master control module does not output a high level to drive the triodes Q1, Q2 and Q3 to be turned on, all the outputs are closed, and three-phase power supply is not performed.

[0056] The working principle of the utility model is as follows: the phase sequence detection module is used for detecting three-phase phase sequence and outputting to the master control module; the missing detection module is used for detecting the connection information of the ground wire, the zero line and the three-phase live wire and feeding back to the master control module; the LCD display module is used for accepting the control of the master control module and displaying the information of the three-phase live wire, the ground wire and the zero line; the alarm module is used for accepting the control of the master control module and alarming; the output control module is used for accepting the control of the master control module, disconnecting the power supply circuit and stopping power supply for the electric load; and the master control module is used for comprehensively controlling the circuit to work.

[0057] It is apparent for a person skilled in the art that the present application is not restricted to the details of the exemplary embodiments described above and that it can be implemented in other concrete forms without departing from the spirit or the essential characteristics of the application. Therefore, the embodiments should be considered as exemplary only and in no way as restrictive.

[0058] In addition, it should be understood that, although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be appropriately combined to form other embodiments that those skilled in the art can understand.

Claims

1. A three-phase five-wire AC power safety system, characterized in that, This three-phase five-wire AC power safety system includes: The phase sequence detection module is used to detect the three-phase phase sequence and output it to the main control module; The error detection module is used to detect the connection information of the ground wire, neutral wire and three-phase live wires, and feed it back to the main control module; The LCD display module is used to receive control from the main control module and display information about the three-phase live wire, ground wire, and neutral wire. The alarm module is used to receive control from the main control module and provide alarm prompts. The output control module is used to receive control from the main control module, disconnect the power supply circuit, and stop supplying power to the electrical load. The main control module is used for the operation of the integrated control circuit. The phase sequence detection module is connected to the main control module, the error detection module is connected to the main control module, and the main control module is connected to the LCD display module, the alarm module, and the output control module.

2. The three-phase five-wire AC power safety system according to claim 1, characterized in that, The phase sequence detection module includes chip U3, model JZ8PSOP8. Pin 2 of chip U3 is connected to the processing signal LU1X of live wire LU1 through resistors R3 and R9. Pin 3 of chip U3 is connected to the processing signal LU2X of live wire LU2 through resistors R10 and R14. Pin 4 of chip U3 is connected to the processing signal LU3X of live wire LU3 through resistors R15 and R20. Pin 7 of chip U3 is connected to the first terminal of optocoupler U4. The second terminal of optocoupler U4 is grounded. The fourth terminal of optocoupler U4 is connected to one end of resistor R21 and the main control module. The other end of resistor R21 is connected to voltage VCC. The third terminal of optocoupler U4 is grounded.

3. The three-phase five-wire AC power safety system according to claim 1 or 2, characterized in that, The error detection module includes optocouplers U5, U7, U8, U9, U10, U12, and U13. The first terminal of optocoupler U5 is connected to the live wire LU1 through resistor R22 and diode D16 in sequence. The second terminal of optocoupler U5 is connected to the ground wire E. The third terminal of optocoupler U5 is grounded. The fourth terminal of optocoupler U5 is connected to the main control module. The first terminal of optocoupler U7 is connected to the live wire LU2 through resistor R23 and diode D17 in sequence. The second terminal of optocoupler U7 is connected to the ground wire E. The third terminal of optocoupler U7 is grounded. The fourth terminal of optocoupler U7 is connected to the main control module. The first terminal of optocoupler U9 is connected to the live wire LU3 through resistor R26 and diode D19 in sequence. The second terminal of optocoupler U9 is connected to the ground wire E. The third terminal of optocoupler U9 is grounded. The fourth terminal of optocoupler U9 is connected to the main control module. The first terminal of optocoupler U12 is connected to ground E through resistor R28 and diode D21 in sequence. The second terminal of optocoupler U12 is connected to neutral line N. The third terminal of optocoupler U12 is grounded. The fourth terminal of optocoupler U12 is connected to the main control module. The first terminal of optocoupler U8 is connected to the live wire LU1 through resistor R24 ​​and diode D18 in sequence. The second terminal of optocoupler U8 is connected to the neutral wire N. The third terminal of optocoupler U8 is grounded. The fourth terminal of optocoupler U8 is connected to the main control module. The first terminal of optocoupler U10 is connected to the live wire LU2 through resistor R27 and diode D20 in sequence. The second terminal of optocoupler U10 is connected to the neutral wire N. The third terminal of optocoupler U10 is grounded. The fourth terminal of optocoupler U10 is connected to the main control module. The first terminal of optocoupler U13 is connected to the live wire LU3 via resistor R29 and diode D22 in sequence. The second terminal of optocoupler U13 is connected to the neutral wire N. The third terminal of optocoupler U13 is grounded. The fourth terminal of optocoupler U13 is connected to the main control module.

4. The three-phase five-wire AC power safety system according to claim 1, characterized in that, The alarm module includes a buzzer BUZ1. One end of the buzzer BUZ1 is connected to voltage VCC, and the other end of the buzzer BUZ1 is connected to one end of resistor R18. The other end of resistor R18 is connected to the main control module.

5. The three-phase five-wire AC power safety system according to claim 1, characterized in that, The output control module includes three output control units, each containing a transistor Q1 and a relay K1. The base of transistor Q1 is connected to the main control module via resistor R6, the emitter of transistor Q1 is grounded, and the collector of transistor Q1 is connected to voltage VDD.

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