First, prevent accidental touching.
1. Strengthen the training of relay protection personnel, carefully study "Electric Power Safety Work Regulations" and "Safety Regulations for Field Work of Relay Protection and Power Grid Safety Automatic Device", and establish a high sense of safety responsibility.
2. Educate all employees not to do things unrelated to work in the field work, pay special attention to the running equipment, be careful in the patrol inspection of equipment, and don't touch the accident button. The protective screen cabinet door is lightly opened and closed; Safety and vibration-proof measures should be taken when drilling holes around operating protection equipment.
No one is allowed to go to the site for maintenance.
4. Before starting work, the monitor should explain the safety measures, and the staff should understand the work content, work place, safety measures and adjacent live parts. The working group will analyze the dangerous points according to the task, foresee the possible unsafe factors in this work, and be aware of them.
5. Before the work starts, the person in charge of the work must check whether the measures taken by the personnel on duty are appropriate and whether the working parts of the staff are within the protection range of the grounding wire.
6. The person in charge of the work shall strictly perform the duties of safety monitoring to ensure that the monitoring is in place.
Second, prevent wrong connections.
1. Put an end to secondary wiring without drawings.
2. When the unit is installed, carefully supervise the installation and debugging of the infrastructure unit, put forward problems in time when found, and conduct debugging and line inspection in strict accordance with regulations to ensure trouble-free and error-free line handover.
3. When the secondary wiring is reformed, a technical scheme shall be formulated and the examination and approval procedures shall be strictly performed step by step. For the design scheme issued by the Safety Production Department, if in doubt, you should raise an objection to the special worker of the Safety Production Department in time, and it can only be implemented after confirmation. Wiring in strict accordance with the drawings, it is forbidden to work by memory.
4. After the work, a detailed transmission test should be conducted to prove the correctness of the circuit wiring. Only after the wiring is confirmed correctly can the equipment be put into operation.
5. When the unit is overhauled, especially for the first time, the secondary circuit, excitation and high and low voltage power supply of the generator-transformer unit should be carefully checked. First of all, we must ensure the correctness of the electrical protection professional circuit, and then check the control and signal circuits with the instrument control professional. Transmission test should be carried out after each overhaul to ensure the correctness of action and status display.
6. Implement the relay protection countermeasures and replace the lines that do not meet the requirements of the countermeasures in time.
7. Modify the changed secondary circuit drawings in time.
Third, prevent false settings.
1. The calculation of protection setting value shall be carried out by approved full-time setting calculation personnel.
2. The setting calculation personnel should carry out setting calculation in strict accordance with the requirements of Guide for Setting Calculation of Relay Protection for Large Generators and Transformers, so as to be well-founded.
3. The calculation and change of the fixed value shall strictly follow the examination and approval procedures. Unapproved fixed values are not allowed to be implemented, and the fixed values of operating equipment cannot be modified at will on site.
4. The parameters used in the fixed value calculation should be strictly based on the actual situation, and it is not allowed to directly calculate the parameters of the design drawings.
5. Setting calculation based on work experience should be prevented.
6. When the fixed value is input on site, it should be confirmed by the reviewer to prevent the wrong fixed value from being pressed.
7. Combined with major repairs, it is necessary to review the fixed value to ensure the accuracy of the fixed value.
Since the invention of electricity, people's lives have become more convenient and faster. Many manual machines can operate automatically by electricity, which makes electronic technology possible. However, attention should be paid to safety in the process of using electricity, and abnormal and unsafe phenomena should be found in time to curb accidents. In the process of using electricity, especially in large factories, we should pay attention to the "three mistakes" and take precautions in advance to reduce the probability of accidents.