The motor unidirectional operation control circuit has short circuit, undervoltage and voltage loss protection, but this is not enough, because the motor current may exceed its rated value in operation, such as long-term overload, frequent operation and open-phase operation.

Huizhou Electrician Training and Textual Research Class, Huizhou Electrician Employment Certificate is a special work permit examination training center, and the training target is:

1, 18 years old, in good health, such as those engaged in electrical industry;

2. Those who have a certain understanding of the basic theory and practice of electrician and want to strengthen the practice and obtain the electrician certificate;

3. People who have been exposed to the electrical industry but lack skills and certificates;

4. People who are not familiar with electrician operation;

5, the majority of electrical and electrical enthusiasts can learn. Training content:

Electrician and electronics, electrical measurement, electrical technology, AC /DC single-phase and three-phase motors, circuit installation and troubleshooting of various machine tools, operation and maintenance of machine tool electrical and electronic control equipment, power supply and distribution technology; The use and maintenance of electrical precision instruments and other courses, master the necessary operating skills of grade workers.

Training mode: adopting the training mode of combining theory with practice; Strengthen theoretical knowledge, attach importance to practical training, and combine lessons.

Assessment method: 1, skill test. The mastery of skills and knowledge is tested by theoretical and practical examination respectively.

2. Safety technology assessment. (Theoretical Computer Examination+Practical Electrical Device Safety Rules Examination)

Certification: After passing the training and examination, Huizhou Safety Supervision Bureau will issue the Certificate of Huizhou Special Operation Certificate (Electrician).