1. Introduction

The maintenance electrician skill assessment training device (or electrician experiment platform) is designed according to the requirements of the "worker grade standard" and "vocational skill appraisal" issued by the Ministry of Labor and Social Security. This equipment is suitable for higher vocational schools and secondary vocational schools. "Motor and Control", "Motor and Drive", "Motor and Transformer", "Programmable Controller" Teaching and training for courses such as "Technology" and non-mechanical and mechanical majors' compulsory course units or elective course units "Motor Control Circuit" and "Machine Tool Circuit Maintenance".

This equipment is also suitable for the internship of the "Electrical Equipment Maintenance" course of mechanical and electrical majors in technical schools. It is also suitable for the installation and maintenance electrician intermediate class, the installation and maintenance electrician advanced class, the installation and maintenance electrician technician class, the installation and maintenance electrician advanced class Training and practical operation of the technician class.

2. Features of the device:

1. The electrical control circuit components are all installed on the mounting board as a hanging board, which is convenient to operate and replace, which is convenient for expanding functions or developing new training. The selection of operation content is typical and practical;

2. The console only needs three-phase four-wire AC power to be put into use;

3. The control circuit for skill training and the specially designed small motor can simulate various electric drive systems in the factory, and can meet the technical requirements of installation, debugging, fault analysis and elimination of maintenance electricians;

4. The device is equipped with voltage and current leakage protectors, which can ensure the safety of the operator's life;

5. All components are led to the wiring terminals through wires, and students only need to wire on the terminals when wiring, which is beneficial to protect the components;

6. Carry out wiring through the wiring trough and conduct process wiring training.

7. It has a timing and alarm recorder, which provides a unified standard for the assessment of students' training skills.

3. Technical performance:

1. Appearance: overall size 1755mm×750mm×1790mm;

2. The material of the training bench: steel structure;

3. Power supply:

1) Input: three-phase AC 380V ±10% 50HZ three-phase five-wire;

2) AC output:

Fixed: Three-phase five-wire 380V plug-in type 1 group, 220V plug-in type 1 group, 220V socket type 3 groups, adjustable: 0～220V continuously adjustable; (with overcurrent protection alarm cut off the power supply, intelligent misoperation record Features)

3) DC output:

Fixed: Excitation power supply 110 V/0.5 A 1 group, +12 V/1.5A 1 group; -12V/1.5 A 1 group; +5 V/1.5A 1 group, (with over-current protection alarm cut off the power supply, intelligent error Operation record function). Adjustable: armature power supply 0～220V/1.5A 1 group (with voltmeter monitoring output), 0～24 V adjustable 2 A 1 group (with voltage/current meter for monitoring output status);

4. Interface and instrument: configurable clicker, with answering function, with teacher computer, intelligent assessment hanging board can be used for intelligent training assessment;

5. Experiment manager: It has the functions of clock, timing reminder, timing power-on, and timing power-off.

6. Misoperation recording device: Misoperation alarm, record and cut off the corresponding power supply function.

7. Meter/header:

1) Internal measurement display: 1 pointer AC voltmeter, 1 digital DC voltmeter, 1 pointer DC voltmeter, 1 pointer DC ammeter; real-time monitoring of the measured voltage/current changes;

2) For training and measurement: 1 digital display power factor meter, 1 digital AC/DC voltmeter each, and 1 digital AC/current meter each;

8. Rectifier bridge: 1 group.

9. Transformer for training: (input) 380 V/220V (output) 110 V, 36 V, 20 V (two groups), 12 V, 6.3 V; (with over-current protection alarm to cut off the power supply, intelligent misoperation record Features)

Maintenance electrician skill assessment training device-aluminum alloy frame

4. Examples of typical training projects that can be completed by this equipment

1. The mechanical characteristic experiment of DC motor;

2. Forward and reverse experiment of DC motor;

3. Start experiment of DC motor;

4. DC motor armature series resistance start control circuit connection training;

5. DC motor step-down start control circuit connection training;

6. DC motor speed control experiment and armature series resistance speed control circuit connection training;

7. DC motor changes the power supply voltage and speed regulation circuit connection training;

8. DC motor changes the excitation current speed regulation circuit connection training;

9. Three-phase AC asynchronous motor mechanical characteristic experiment;

10. DC motor mechanical performance characteristic experiment;

11. The control circuit connection of the inching and one-way continuous rotation of the AC asynchronous motor;

12. The connection of the forward and reverse control circuit of the three-phase AC asynchronous motor with contactor interlock;

13. Connection of the forward and reverse control circuit of the three-phase AC asynchronous motor with button interlock;

14. The connection of the forward and reverse control circuit of the three-phase AC asynchronous motor interlocked by the button and contactor;

15. The connection of the Y-△ (manual switching) start control circuit of the three-phase AC asynchronous motor;

16. The connection of the Y-△ (time relay switching) start control circuit of the three-phase AC asynchronous motor;

17. The connection of the stator winding series resistance to start the control circuit;

18. Connection of three-phase AC asynchronous motor dynamic braking control circuit;

19. The connection of the three-phase AC asynchronous motor reversely connected to the brake control circuit;

20. Connection of sequence control circuit of multiple (3 and below) motors

21. The connection of the motor's reciprocating stroke control circuit;

22. Connection of two-speed motor speed control circuit;

23. Stepper motor control training

24. Simple relay program control circuit connection;

25. Connection of ordinary lathe control circuit;

26. Inspection and elimination of common faults in the electrical control circuit unit of the CA6140 lathe;

27. Inspection and elimination of common faults in the electrical control circuit unit of the X62W milling machine;

28. Panel function parameter setting and operation training;

29. The inverter controls the jog and start-stop of the motor;

30. Multi-stage control of motor speed;

31. Power frequency and variable frequency switching control;

32. Motor open-loop speed regulation based on analog control;

33. Motor open loop speed regulation based on panel operation;

34. The protection and alarm function training of the frequency converter;

35. Open loop speed regulation of frequency converter based on PLC analog control;

36. Inverter closed-loop speed regulation based on PLC analog control;

37. Three-phase thyristor fully controlled bridge rectifier circuit;

38. Three-phase thyristor KC785 integrated trigger circuit;

39. Switch motor control training;

40. Current regulator circuit;

41. Speed regulator circuit;

42. Overcurrent protection circuit;

43. Double closed-loop DC motor control training;

1. Failure phenomenon of lathe electrical control circuit:

1) All motors are missing one phase, and all control loops fail;

2) One phase of the spindle motor is missing;

3) One phase of the spindle motor is missing;

4) One phase of M2 and M3 motors is missing, and the control loop fails;

5) The cooling pump motor is missing one phase;

6) The cooling pump motor is missing one phase;

7) One phase is missing for the fast moving motor of the tool post;

8) One phase is missing for the fast moving motor of the tool post;

9) Except for the lighting lamp, other controls are invalid;

10) The control circuit fails;

11) When the indicator light is on, other controls are invalid;

12) The spindle motor cannot be started;

13) Except for the rapid movement control of the tool post, other controls fail;

14) The fast moving motor of the tool post does not start, and the fast moving of the tool post fails;

15) The machine control is invalid;

16) The spindle motor starts, the cooling pump control fails, and QS2 does not work.

2. Failure phenomenon of the electrical control circuit of the milling machine:

1) One phase is missing for both the forward and reverse rotation of the spindle motor, one phase is missing for the feed motor and the cooling pump, and the control transformer and lighting transformer are out of power;

2) The spindle motor lacks one phase regardless of the forward or reverse rotation;

3) One phase is missing when the feed motor reverses;

4) The rapid feed solenoid can't move;

5) The lighting and control transformers are out of power, the lighting is off, and the control circuit is invalid;

6) The control transformer is out of power and the control circuit fails;

7) The lighting is not on;

8) The control circuit fails;

9) The control circuit fails;

10) The spindle brake fails;

11) The spindle cannot be started;

12) The spindle cannot be started;

13) The table feed control fails;

14) Downward, rightward, and forward movement of the worktable will invalidate the control;

15) Backward, upward, and left feed control of the worktable is invalid;

16) Both rapid traverses are disabled.

Maintenance electrician skill assessment training device (cabinet type)

5. Equipment configuration:

1. The training unit hanging board, built-in 3 high-power disk resistors, used in conjunction with other hanging boards; this unit hanging board can be used with other hanging boards to complete the start of the motor stator winding series resistance, the DC motor armature series resistance start, etc. Practical training.

2. Electric drag hanger, 1 three-phase leakage protection circuit breaker, 1 3P fuse, 2 1P fuse, 1 time relay, 3 indicator lights, 3 AC contactors, 3 thermal relays, 3 buttons, 1 emergency stop switch, 21 terminal blocks, etc.; (contactors and thermal relays use Schneider).

3. This hanging board can independently complete basic control circuits such as motor rotation direction, step-down start, electrical control, and self-locking, interlocking, time and other controls, and the motor control circuit connection training composed of overload, zero voltage, leakage, and short circuit protection. . It can also complete the training and assessment of electric motor control circuit connection for electrician induction, elementary and intermediate assessment.

4. Power drag expansion hanger, 4 travel switches, 1 master switch, 1 universal changeover switch, 1 AC contactor, 1 thermal relay, 2 electronic time relays, 1 indicator light, 1 button Only, 18 terminal blocks, etc.; (contactors and relays use Schneider).

5. LCD single answerer, matching with the intelligent training and assessment hanging board, LCD man-machine interface, Chinese display, displaying more information and more intuitive; with 1 2000mm cable, used for single-station training equipment assessment .

6. Intelligent training and assessment hanging board for lathe circuit, including 1 three-phase leakage protection circuit breaker, button, 3,, 2 master switches, indicator yellow 36V, 1 green, 36V1, red 36V2 Only, red 220V1, fuse 3P2, fuse, 1P2, AC contactor 127V3, transformer 380V/127V36V1, thermal relay 2, number special-shaped tube 1 set, safety socket 14, handle 1 pair, guide rail 20cm, one smart assessment board;

7. Electric hoist circuit intelligent training and assessment hanging board, including 1 three-phase leakage switch, 4 buttons, 3 travel switches, 2 green indicators, 4 red, 1 fuse 3P, 1P, 2 , 4 AC contactors, 2 thermal relays, 1 set of special-shaped pipes, 3 safety sockets red, 3 yellow, 3 green, 1 blue, 1 black, 1 pair of handles, 20cm guide rail, 8 terminal blocks Only, one smart assessment board

8. Let students master the electrical working principle of the electric hoist and its troubleshooting skills, and cooperate with the clicker to complete the intelligent training and assessment.

9. T68 boring machine circuit intelligent training assessment, including 1 three-phase leakage protection circuit breaker switch, 5 buttons, 5 master switches, 1 yellow indicator light, 3 green, 1 red 380V, and 1 red 220V , Red 36V4 pcs, fuses 3P2 pcs, 1P3 pcs, AC contactors 7 pcs, transformer 1 pcs, thermal relay 1 pcs, time relay 1 pcs with handle switch 2 pcs, safety socket 14 pcs, handle 1 pair, guide rail 20cm, There are 14 connecting terminals and one intelligent assessment board, allowing students to master the electrical working principle of the T68 boring machine circuit and its troubleshooting skills, and cooperate with the clicker to complete the intelligent training assessment.

10. X62W type milling machine circuit intelligent training and assessment hanging board, including 1 three-phase leakage protection circuit breaker, 8 button switches, master switch A6140 type lathe electrical working principle and its troubleshooting skills. 4 pcs, indicator yellow 1 pcs, green 2 pcs, red 3 pcs, red 2 pcs, fuses 3P2 pcs, 1P2 pcs, AC contactors 6 pcs, transformer 380V/127V1 pcs, 380V/36V1 pcs, thermal relay 3 Only, can switch 2 pcs, rod type resistor 2 pcs, number tube 1 set, safety socket 4 pcs yellow, 4 pcs green, 4 pcs red, 3 pcs blue, 1 pc black, 1 pair of handles, 15cm guide rail, 10 terminal blocks Only, one smart assessment board;

11. Training motor:

Three-phase asynchronous motor (380V, single-speed generator with tachometer)

PN(W): 60, nN(r/min): 1400, UN(V): three-phase AC380, IN(A): 0.33, connection group: △/Y tachometer generator

PN(W): 1.0, nN1(r/min): 1400, U1(V): DC10

Three-phase asynchronous motor with centrifugal switch

PN(W): 60, nN(r/min): 1400, UN(V): three-phase AC380IN(A): 0.33, connection group: △/Y

Separately Excited DC Motor

PN(W): 120, nN(r/min): 1000, U1N(V): DC110, U2N(V): DC110, IN(A): 1.25

Three-phase two-speed asynchronous motor

PN(W): 40/25, nN(r/min): 2800/1400, UN(V): three-phase AC380IN(A): 0.25/0.2, connection group: △/2Y

Slip motor (380, Y type connection) three-phase synchronous motor

nN(r/min): 1400, UN(V): three-phase AC380, IN(A): 0.5 Connection group: Y

Field winding

UN(V): DC50, IN(A):1

12. Mitsubishi mainframe hanging board, including one Mitsubishi mainframe FX2N-48MR mainframe, one analog module FXON-3A, safety socket, isolation board, 1 pair of handles, 1 set of iron hanging board;

13. PLC training hanging board, panel made of PCB board, including 10 kinds of independent items, made of PCB board, 1 pair of handles, 1 set of iron hanging board; cooperate with the mainframe hanging board to complete the automatic washing machine training, Automatic feeding device, light of iron tower, assembly line, automatic/manual control of traffic light, motor control, automatic mixing of multiple liquids, stepping motor, automatic water level control of water tower, LED digital tube display training. (Small socket)

14. Mitsubishi inverter hanging board, including 1 Mitsubishi inverter FR-D720S-0.4kW, safety socket, 1 pair of handles, 1 set of iron hanging board;

All the contacts of the inverter are connected to the safety plug on the control panel, and can be used independently through the switch on the inverter panel; the inverter can also be used in conjunction with the PLC; (large socket)

15. The simulation training system and simulation training unit communicate with the computer through the serial port, and can complete 13 training projects such as four-story elevator control. The action of the software simulation load is controlled by the PLC, and the I/O variables of the programmable controller corresponding to the various actions in the animation can be edited and modified through the simulation control software

16. The power electronic hanging board and panel adopt the original PCB board and the actual circuit of the industrial site; built-in three-phase isolation transformer, three-phase synchronous transformer and other power sources, can independently complete three-phase thyristor half-controlled bridge rectifier circuit, three-phase thyristor full-controlled bridge Training content such as integrated rectifier circuit and three-phase thyristor KC785 integrated starting circuit;

17. Power electronic hanging boards and panels adopt the original PCB board and the actual circuit on the industrial site; built-in built-in current regulation circuit, speed regulation circuit, overcurrent protection circuit, PWM control switching power supply circuit; it can be completed with DL002-01 Double closed loop DC speed control system;

18. Training wires, including electrical, electronic, and patch cords.

19. Communication cables, including Mitsubishi communication cables, hanging board communication cables, RS232C/RS422 communication cables, etc.

20. Software, Mitsubishi GXDEVELOPER8.34L-C (CD-ROM) programming software, simulation software, intelligent assessment software.

21. Maintenance of electrician and electronic motor and vocational qualification training and evaluation simulation software: the software content includes safe electricity knowledge, electrician tools, electrician knowledge diagrams, electrician meters, electrician lighting circuits, motors, transformers, low-voltage electrical appliances, electric tractors, oscilloscopes, low-frequency signals Source, welding process, SMT technology, electronic product manufacturing process, troubleshooting, wiring, reducer three-dimensional disassembly and assembly, shafting mechanism disassembly and assembly (including more than ten experiments such as cylindrical gear shafting, bevel gear shafting and worm shafting) The school can select the corresponding training module for training according to the student’s learning progress. In order to protect intellectual property rights and reduce disputes on property rights, bidders need to provide the original copyright in accordance with the name of the software and provide a demonstration of the software. If a false certificate is used to respond to the bid, once verified, it shall be treated as an invalid bid, and the original manufacturer and the bidder shall be held accountable.

22. Electric safety and electric shock first aid virtual simulation system: using two-dimensional and three-dimensional virtual screens to teach students the safety and first aid methods of electricity use. The software includes single-phase electric shock, two-phase electric shock, step electric shock, and low-voltage electric shock. First aid, high-voltage electric shock first aid, artificial respiration rescue method, hand-in-hand breathing rescue method, chest heart compression protection method and other principles are explained and taught, single-phase electric shock is divided into maintenance live line disconnection, maintenance socket electric shock, outdoor electric shock and other principle demonstrations. Low-voltage electric shock and high-voltage electric shock teaching mainly explain how to rescue people in low-voltage or high-voltage electric shocks for students. Artificial respiration rescue method, hand-in-hand breathing rescue method, chest heart compression rescue method are displayed using 3D virtual simulation technology, after rendering and Retouching makes the model look the same as the real parts, and the picture is lifelike. Through practical training, students can be trained on the safe use of electricity in the training room, improve their safety awareness, and enable students to learn some self-help methods, so that students can take certain safety measures when encountering danger, protect themselves, and become familiar with various Causes of electrical accidents and practical operational measures to deal with electrical accidents to reduce the occurrence of electrical accidents. In order to protect intellectual property rights and reduce property rights disputes, bidders need to provide the original copyright in accordance with the name of the software, and provide a system demonstration. If a false certificate is used to respond to the bid, once verified, it shall be treated as an invalid bid, and the original manufacturer and the bidder shall be held accountable.