Agricultural mechanical braking system anatomy training desk

 

1. Based on a complete renovation 250 dragging mechanism (including frame, front and rear bridges, etc.), students can analyze the braking system through observation of the external structure of the system and conduct tr--ning descriptions. Working principle and its working process.

 

2. The mobile table uses high -intensity steel structure welding, and the surface is sprayed on the surface. The bottom of the mobile platform has a self -locking foot wheel device, which can be moved for convenient teaching.

 

3. Applicable to the theory and m--ntenance tr--ning needs of various schools, the teaching functions of the theory and m--ntenance tr--ning of brake systems in various schools, and fully meet the teaching functions such as the structure display, work simulation, and tr--ning tr--ning of the dragging mechanism.

 

This experimental equipment is complete, convenient, safe and reliable.

 

2. Technical specifications

 

Dimensions: about 2000 × 1400 × 1200mm (long × width × height)

 

External power supply: AC 220V ± 10% 50Hz

 

Work temperature: -40 ℃ ～+50 ℃

 

Color: white

 

Steel pipe: 50*50*3mm

 

Mobile foot wheel: 200*100mm

This device is based on the teaching requirements of courses such as "Power System Relay Relay Protection", "Electricity Engineering", "Electricity Automation", "Microcomputer Protection of Electric Power System", and combined with the actual application and development of the microcomputer line protection experimental device. Through this experiment, students can be familiar with and master the principles of conventional electromagnetic relay protection and microcomputer protection in the power system to protect the wiring and setting test methods. The installation design is compact, integrated, and the function of the protection device is complete. It integrates multiple functions of protection, measurement, control, monitoring, and communication. This device can not only be used as a teaching experimental platform for protection of professional line protection of electricity, electrical, and automation, but also also Can be familiar with and master the hardware and software platforms that master the power communication regulations and multiple programming software. This device is also equipped with RS-485/MODBUS-RTU communication interface and upper machine monitoring software.

 

1. The safety protection system of the device

 

After the three -phase and four -line power supply is input, the output (floating ground design) is used (floating ground design). The total power supply is controlled by the three -phase key switch, and a three -phase lamp fuse is provided as the instructions and protection of the phase.

 

The control screen power supply is controlled by the contactor through the start and stop button.

 

The screen is equipped with a voltage leakage protection device and a set of current leakage leakage protection device. If there is a leakage in the inside, outside or strong electricity output of the screen, the alarm and cut off the total power supply to ensure the safety of the experiment.

 

Three -phase tone pressure device original and sub -edge have overcurrent protection technologies, which can be automatically protected by phase and lines of over -current or direct short circuit.

 

There is a timer and alarm recorder (service manager) to record the number of times of illegal use, and provide a unified standard for the assessment of students' experimental skills.

 

2. Experimental project

 

System experiment

 

The simulation system is normal, maximum, and minimum operation experiment

 

Simulation system short circuit experiment

 

Protective device static test

 

Basic function test of microcomputer protection device

 

Microcarmark time limit over current protection

 

Microcarmarking current speed break protection

 

Microcarmark Time -limited current speed break protection

 

Phase current protection

 

The effect of running method on protection sensitivity and sensitivity verification

 

Current voltage ch--n protection

 

Anti -time limit protection experiment

 

Periodic overcurrent protection and automatic overlapping front acceleration