I. Overview

II. Features

1. The components of the electrical control circuit are all mounted on mounting plates as hanging boards, which are easy to operate and replace, facilitating function expansion or new training development; the selection of operation contents is typical, practical, and scientific.
2. The operation platform can be put into use only with a three-phase four-wire AC power supply.
3. The control circuits for skill training and specially designed small motors can simulate various electrical drag systems in factories, and can meet the requirements of maintenance electricians for skill training in installation, commissioning, fault analysis, and troubleshooting.
4. All components of the relay contact control circuit training are led to terminal blocks through wires. Students only need to connect wires on the terminals during wiring, which is beneficial to protect the components; during training, wires are routed through trunking for process wiring training.
5. Electrical components such as contactors and thermal relays adopt well-known domestic and foreign brands to ensure the quality and performance of the equipment.
6. Equipped with voltage-type leakage protectors and current-type leakage protectors to ensure the safety of operators; each power output has monitoring and short-circuit protection functions. In case of misoperation or short circuit caused by wrong wiring during training, the device can automatically protect, avoid burning fuses and damaging electrical appliances, and ensure the smooth progress of training.
7. The control panel is also equipped with a timer and alarm recorder (service manager), providing a unified standard for the assessment of students’ experimental skills.
8. The connection between the training circuit and the device power supply is through safety sockets and high-reliability sheathed structure pistol plugs, which is safe and fast.
9. The device is equipped with a three-phase power output short-circuit soft cut-off protection function, which prevents damage to components due to short circuits caused by wrong wiring or misoperation during students’ training, and at the same time ensures the smooth progress of training and saves training costs.

III. Technical Performance

1. Input voltage: three-phase four-wire 380V±10% 50Hz
2. Working environment: ambient temperature range -5～+40℃, relative humidity <85% (25℃), altitude <4000m
3. Device capacity: <1.5KVA
4. Overall dimensions: 1600×700×1530mm

IV. Device Configuration

(I) DW02 Power Supply Control Panel

1. Three-phase four-wire power input, after passing through the leakage protector and main switch, the contactor is controlled to turn on and off through start and stop buttons, and is equipped with an emergency stop control button.
2. There is one 450V pointer-type AC voltmeter on the control panel, which can observe three grid voltages through a band switch.
3. Timer and alarm recorder (service manager), which is usually used as a clock, with functions of setting training time, timing alarm, and power cut-off; it can also automatically record the total number of leakage alarms and power short circuits caused by wiring or operation errors, providing a unified standard for the assessment of students’ training skills.
4. AC low-voltage power supply: equipped with a transformer, with primary side 220V, secondary side 26V and 6.3V AC voltage. 6.3V is used for the power supply of signal indicator lights, and 26V is used for the AC power supply of the rectifier circuit in energy consumption braking.
5. Four 5408 diodes, used for the rectifier circuit of energy consumption braking.
6. Three 75Ω/75W resistors are used for motor step-down starting, and one 10Ω/25W resistor is used for asynchronous motor energy consumption braking.

(II) Training Table

V. Training Projects

1. Single-phase start-stop control circuit
2. Asynchronous motor inching control circuit
3. Asynchronous motor two-location control circuit
4. Asynchronous motor interlocking forward and reverse control circuit
5. Double interlocking control circuit
6. Automatic sequence control circuit
7. Manual sequence starting
8. Asynchronous motor star-delta control circuit
9. Asynchronous motor energy consumption braking control circuit
10. Button interlocking three-phase asynchronous motor forward and reverse control circuit
11. Contactor interlocking three-phase asynchronous motor forward and reverse control circuit
12. Double interlocking three-phase asynchronous motor forward and reverse control circuit
13. One-way step-down starting and reverse connection braking control circuit
14. Asynchronous motor reverse connection braking control circuit
15. Automatic reciprocating control circuit
16. Forward and reverse inching, starting control circuit
17. Automatic reciprocating control circuit with inching function
18. Asynchronous motor self-locking control circuit
19. Asynchronous motor single-phase inching, starting control circuit
20. Manual control circuit for stator series resistance step-down starting of three-phase asynchronous motor
21. Automatic control circuit for stator series resistance step-down starting of three-phase asynchronous motor
22. Contactor-controlled two-speed motor control circuit
23. Time relay-controlled two-speed motor control circuit
24. C620-1 lathe control circuit
25. Electric hoist control circuit
26. Y3150 gear hobbing machine control circuit
27. Electric hoist circuit
28. Z3040 radial drilling machine circuit
29. CA6140 lathe circuit
30. Starting of shunt-excited DC motor
31. Speed regulation of shunt-excited DC motor
32. Forward and reverse rotation of shunt-excited DC motor
33. Braking of shunt-excited DC motor
34. Socket and one switch control one lamp (incandescent lamp, fluorescent lamp + two-pole leakage switch)
35. Two two-way switches control one lamp (incandescent lamp, fluorescent lamp + two-pole leakage switch)
36. Three switches control one lamp (incandescent lamp, fluorescent lamp + two-pole leakage switch)
37. Wiring of fluorescent lamp circuit
38. Wiring of sound-controlled switch controlling incandescent lamp circuit
39. Wiring of touch delay switch controlling incandescent lamp circuit
40. Wiring of human body induction switch controlling incandescent lamp circuit
41. Direct wiring circuit of single-phase watt-hour meter
42. Wiring circuit of single-phase watt-hour meter through current transformer
43. Wiring circuit of voltmeter and ammeter
44. Wiring of voltmeter measuring three-phase voltage with universal changeover switch
45. Control circuit wiring of one current transformer used in single-phase circuit
46. Three current transformers connected in star wiring circuit
47. Three current transformers connected in delta wiring circuit
48. Measuring circuit of three-phase power factor meter
49. Wiring circuit of three-phase three-wire active watt-hour meter
50. Wiring circuit of three-phase three-wire active watt-hour meter through current transformer
51. Wiring circuit of three-phase four-wire active watt-hour meter
52. Wiring circuit of three-phase four-wire reactive watt-hour meter through current transformer
53. Wiring circuit of three-phase four-wire reactive watt-hour meter
54. Wiring circuit of three-phase four-wire reactive watt-hour meter through current transformer

VI. Configuration of Training Component Hanging Boxes