High-Performance Training Device for Junior Maintenance Electrician Skill Assessment

Product Introduction

This training device is developed in accordance with the electrical control circuits and practical electronic circuits specified in the skill training and assessment standards for junior and intermediate maintenance electricians issued by the Ministry of Human Resources and Social Security. Practical training on this device enables learners to quickly master practical technologies and operational skills of relevant courses. Featuring pertinence, practicability, scientific design and advanced performance, the equipment is suitable for student training. Meanwhile, it serves as ideal equipment for junior and intermediate maintenance electrician skill assessments carried out by vocational skill appraisal authorities, universities, colleges, vocational schools and technical schools.

Product Features

(I) Power Control Cabinet The cabinet adopts double-layer matte textured spray-painted iron structure with aluminum panel. Equipped resources of main control function board:

1.Power is supplied to the training bench via three-phase four-wire power input after passing through earth leakage protection switch and fuses.

2.One 450V analog AC voltmeter is installed on the control panel. The voltages of three power grid phases can be observed by switching via a band switch.

4)Background System: Includes account management, equipment management, maintenance request management and user management. Equipment Management:

4.Low-voltage AC power supply: Equipped with one transformer, primary voltage 220V, secondary voltages 26V AC and 6.3V AC. 6.3V supplies power for signal indicator lamps; 26V serves as AC power supply for rectifier circuit in dynamic braking.

5.Four 5408 diodes for rectifier circuit of dynamic braking.

6.Three 75Ω/75W resistors for reduced-voltage starting of motors; one 10Ω/25W resistor for dynamic braking of asynchronous motors.

(II) Training Desk Specifications: 1600 (L) × 700 (W) × 1500 (H) mm. Two drawers are arranged on the left and right sides of the desk. The main structure of the desk adopts high-performance surface anodized aluminum profiles and one-step die-cast aluminum connecting components.

The connecting parts are manufactured by die casting (non-welding process), followed by machining, shot blasting, sand blasting and surface electrostatic spraying.

The desk is easy and fast to install and allows DIY assembly by users. Desk uprights adopt industrial aluminum profile forming process with surface oxidation treatment; cross-section dimension: 70×70mm, four sides with grooves, groove width about 8mm, with matched plastic end caps at ends. The desktop adopts 25mm E1 grade melamine faced board.

A supporting frame is arranged under the desktop, with bearing capacity not less than 300kg. A storage cabinet is equipped to place training hanging boxes. Four heavy-duty lockable PU swivel casters are installed at the bottom of storage cabinet for easy movement. The overall training device features concise yet sophisticated design with high-end appearance, conforming to aesthetic standards and development trend of modern products.

Two desk legs at the rear of the training desk extend upwards, fitted with two specially molded aluminum beams with sliding grooves to form the support frame for electrical training hanging boxes. The support frame matches electrical control training hanging boxes, enabling convenient vertical installation and flexible horizontal shifting. The power control cabinet is installed on the top of the support frame.

(III) Training Hanging Boxes The hanging boxes are pre-installed with fuses, toggle switches, AC contactors, time relays, DC contactors, pushbutton switches, signal indicator lamps, thermal overload relays and other components.

All components adopt well-known domestic and international brands. Wiring of various training components is implemented on terminal blocks, avoiding component wear caused by repeated screw disassembly directly on components.

Wiring is arranged inside trunking for process wiring training. Connection between training circuits and device power supply adopts safety sockets and highly reliable sheathed banana plug connecting wires for safe and fast operation.

1. DW-01 Maintenance Electrician Training Module

(I) The hanging board is equipped with AC contactors, pushbutton indicator lamps (6.3V), terminal blocks, safety sockets, etc.

2. DW-02 Maintenance Electrician Training Module

(II) The hanging box is equipped with plug-in fuses, low-voltage circuit breakers, thermal overload relays, time relays, terminal blocks, safety sockets, etc.

3. DW-03 Maintenance Electrician Training Module

(III) The hanging box is equipped with changeover switches, solenoid valves, joystick switches, limit switches, etc.

4. Three-phase squirrel-cage asynchronous motor, 380V, Y connection

5. Three-phase squirrel-cage asynchronous motor, 380V, delta connection

Technical Specifications

1. Input Voltage: 3-phase 4-wire (or 3-phase 5-wire) AC 380V±10%, 50Hz

2.Operating Environment: Ambient temperature: -10℃ ~ +40℃; Relative Humidity ＜85% (at 25℃)

3.Overall Dimensions: 1600×700×1600 mm

4.Device Capacity: ＜1.5 kVA

Practical Training Projects

1. Power electronics technology (traditional rectification)

1. Direct-on-Line Starting Control of Three-Phase Asynchronous Motor
2. Contactor Jog Control Circuit for Three-Phase Asynchronous Motor
3. Contactor Self-locking Control Circuit for Three-Phase Asynchronous Motor
4. Forward Rotation Control Circuit with Overload Protection
5. Button Interlock Contactor Forward & Reverse Rotation Control Circuit for Three-Phase Asynchronous Motor
6. Sequence Control of Three-Phase Asynchronous Motors
7. Multi-location Control of Three-Phase Asynchronous Motors
8. Contactor-controlled Y/△ Reduced-Voltage Starting Control Circuit
9. Time Relay-controlled Y/△ Reduced-Voltage Starting Control Circuit
10. Installation, Commissioning of Energized Delay Y-△ Starting Control Circuit with DC Dynamic Braking
11. Contactor Interlock Forward & Reverse Rotation Control Circuit
12. Composite Interlock (Button + Contactor) Motor Forward & Reverse Rotation Control Circuit
13. Contactor-controlled Series Resistance Reduced-Voltage Starting Control Circuit
14. Time Relay-controlled Series Resistance Reduced-Voltage Starting Control Circuit
15. Automatic Reciprocating Control Circuit for Workbench
16. Half-wave Rectification Dynamic Braking Control Circuit
17. Single-phase Operation Plug Braking Control Circuit
18. Wiring, Fault Detection and Maintenance of C620 Lathe
19. Wiring, Fault Detection and Maintenance of Z3040 Radial Drilling Machine
20. Electronic Skill Innovation Training

A. Basic Experiments

1. Lighting up the first LED
2. LED Blink Experiment
3. LED Running Light
4. Buzzer Control
5. Static Digital Tube Display
6. Dynamic Digital Tube Display
7. Independent Key Detection
8. Matrix Keyboard Experiment
9. 8×8 LED Dot Matrix (Light a Single Dot)
10. 8×8 LED Dot Matrix (Number Display)
11. External Interrupt 0
12. External Interrupt 1
13. Timer 0 Interrupt
14. Timer 1 Interrupt
15. Serial Communication
16. EEPROM I2C Communication
17. DS18B20 Temperature Sensor Experiment
18. DS1302 Real-Time Clock
19. Infrared Communication
20. AD Analog-to-Digital Conversion
21. DA Digital-to-Analog Conversion
22. LCD1602 Liquid Crystal Display

B. Intermediate Experiments

1. DS1302 Clock Display on LCD1602
2. Scrolling Display on LCD1602
3. Infrared Value Display via LCD1602
4. Matrix Keyboard Key Value Display on LCD1602
5. Temperature Display on LCD + Serial Port Temperature Reception
6. Chinese Character Display on LED Dot Matrix
7. Number Display on LED Dot Matrix
8. LED Running Light Controlled by Timer
9. Buzzer Controlled by Keys
10. Digital Tube Controlled by Keys
11. Timer Stopwatch (Query Mode)
12. Buzzer Playing Music: Osmanthus Blossoms in August
13. Matrix Keyboard Controlled Digital Tube Shift Display
14. Doorbell Design
15. Stopwatch
16. Music Player

C. Advanced Experiments

1. Ultrasonic Distance Measurement (LCD1602 Display)
2. Ultrasonic Distance Measurement (Digital Tube Display)
3. Incubation Environment Temperature & Humidity Monitoring System Design
4. Single-Chip Microcomputer-based Indoor Air Purification System
5. Single-Chip Microcomputer-based Temperature and Humidity Acquisition System
6. Single-Chip Microcomputer-based Intelligent Calculator