【Daily Question 20090207】What does the concept of \"two tickets and three systems\" in electrical work refer to?

Two types of tickets: work ticket and operation ticket. Three systems: shift handover system, routine inspection system, and regular equipment testing and rotation system.

Work order, operation ticket； Shift rotation system, routine inspection system, and regular equipment testing and rotation system.

(Two types of tickets: work ticket, operation ticket)； Three systems: shift handover system, routine inspection system, and regular equipment testing and switching system). Attached are questions related to the management of the two tickets and three systems in power generation. 1. What systems does the term “two tickets and three systems” refer to? (Two types of tickets: work ticket, operation ticket) ； Three systems: shift handover system, routine inspection system, and regular equipment testing and switching system). 2. What are the “three no-lets-go” principles for investigating power production accidents? (The cause of an accident must be clarified; those responsible for the accident and those who need to be educated must receive proper training; no preventive measures must remain unimplemented.) 3. What is the sequence for shutting down electrical equipment by turning off the power supply? (Circuit breaker, load-side isolator, busbar-side isolator) 4. What are the procedures for issuing a thermal machine maintenance work order? (1. Issue the work order ； 2. Accept the work order ； 3. Implement and enforce safety measures ； 4. Work Permit ； 5. Start working ； 6. Work supervision ； 7、Work delay ； 8. Trial operation of maintenance equipment ； 9. Completion of work) 5. What other tasks must the electrical work permit issuer carry out after implementing safety measures at the maintenance site before work can be authorized? (Together with the person in charge of the work, go to the site to check again the safety measures taken; touch the equipment to confirm that there is indeed no voltage present) ； Indicate to the person in charge of the work the location of the live equipment and the precautions to take ； 3. The person in charge of the work and the worker sign on the work order respectively.) 6. What does “three violations” refer to? (① Illegal instructions ② Illegal operations ③ Violation of labor discipline) 7. What are the four common types of safety signs? (“Do not close the switch – someone is working!” ” ； “Closing is prohibited; there are people working on the line! ” ； “Working here! ” ； “Stop, high voltage danger! ； “From now on, up and down! ” ； “Climbing prohibited, high voltage hazard! ”Wait. ) 8. Which operational tasks for electrical equipment can be carried out without using an operation ticket? (Accident handling, single operations of closing and opening circuit breakers, opening the grounding switch or removing the only set of grounding wires in the entire plant) 9. What does the three-level control system in power generation enterprises refer to? (① The enterprise controls serious injuries and accidents, ensuring no deaths, major equipment damage, or grid failures occur ； ②The workshop (sub-site) controls minor injuries and disruptions, with no serious injuries or accidents occurring ； ③Team control prevents failures and abnormalities, ensuring no minor injuries or disruptions occur. ) 10. How much in advance should the duty personnel arrive at the site? How much in advance should the pre-shift meeting be held? (30 minutes, 10 minutes) 11. What should be done if someone shows signs of being under the influence of alcohol while at work? (They should be ordered to leave immediately.) 12. In what situations is it necessary to inspect the relevant equipment immediately? (Before and after bringing backup equipment into use, when there are abnormal changes in the equipment’s operating parameters, sound, or vibration, after the equipment is affected by a system failure, or when sudden abnormal changes occur during operation.) 13. Which operations do not require an operation ticket? (Accident handling, single operation of opening and closing switches, opening the grounding switch or removing the only set of grounding wires in the entire plant)

Two types of tickets: operation ticket and work ticket. Three systems: shift handover system, routine inspection system, and regular equipment testing and rotation system.

Two types of tickets: work ticket, operation ticket； Three systems: shift handover system, routine inspection system, and regular equipment testing and switching system.

Two types of tickets: switching operation ticket and electrical work ticket (work tickets are divided into the first type and the second type). Three systems: shift handover system, routine inspection system, and regular testing and switching system.

In simple terms, the two tickets and three systems refer to work tickets and operation tickets； Shift handover system, routine inspection system, and regular equipment testing and switching system.

Two types of tickets: work ticket, operation ticket； Three systems: shift handover system, routine inspection system, and regular equipment testing and switching system

Work order, operation ticket； Shift rotation system, routine inspection system, and regular equipment testing and rotation system.

Answer: The two types of tickets are work tickets and operation tickets； The three systems are the shift handover system, the routine inspection system, and the regular equipment testing and rotation system.

Two types of tickets: 1. Work ticket, 2. Operation ticket； Three systems: 1. Shift handover system, 2. Patrol inspection system, 3. Regular equipment testing and switching system

The two types of tickets are electrical work tickets and operation tickets； The three systems are: shift handover system, routine inspection system, and regular equipment testing and switching system

Two types of tickets: work ticket, operation ticket； Three systems: shift handover system, routine inspection system, and regular equipment testing and switching system

Two types of tickets: work ticket, operation ticket； Three systems: shift handover system, routine inspection system, and regular equipment testing and switching system

The “two tickets and three systems” are among the most fundamental systems in the safety production framework of the electric power industry. They represent experience gained over many years of operation in China’s power sector, and the causes of any human-error-related accidents can always be traced back to issues related to the implementation of these “two tickets and three systems”. To put safety policies into practice, improve the ability to prevent accidents, and eliminate accidents caused by human error as well as serious misoperations, the \"two tickets and three systems\" must be strictly enforced, with attention paid to the following points: (1) Strengthen the implementation and management of operation tickets. An operation ticket is the specific basis for carrying out designated operation tasks based on operation commands. However, some people are unclear about the operational tasks during execution, have weak professional skills, are not proficient in the operations, and fail to strictly follow the operation procedures, which often leads to mistakes in operation. Therefore, management of electrical operations and thermal engine operations should be strengthened to standardize these operations. Attach importance to the division of tasks and skill training, and strictly implement the operation ticket system. Before proceeding with the operation, carefully review the operation ticket; the details of the operations must be clear and specific. During the operation, it is necessary to distinguish between the responsibilities of the supervisor and the operator, and have experienced personnel carry out the tasks in sequence according to the operation ticket, ensuring that the supervision system is properly implemented. 　　(2) Strictly manage work tickets to prevent operations without them. The work order approval process must not be a mere formality or done perfunctorily. Some people avoid issuing work orders to save trouble while working, especially for tasks that do not require any actions from operators or are related to thermal systems. Oftentimes, working without such orders means that the necessary approvals and permits are missing, which ultimately leads to accidents. As operators, it is necessary to exercise strict control over work order approval procedures to prevent work being carried out without proper authorization. 　　(3) Strictly implement the shift handover system. The person taking over should only assume the role after having a thorough understanding of the equipment’s operating status. This requires them to pay attention to equipment inspections, carefully review various records, and fully understand the causes, processes, and preventive measures for any incidents that occurred during the period when the equipment was not in use. At the same time, the signing and handover ceremony during shift changes are effective ways to help the person taking over get mentally prepared for work right away; this is not merely a formality. During the shift handover meeting, it is essential to promptly summarize and analyze the work done during that shift, paying attention to timeliness; this will help improve the quality of operations. 　　(4) Improve the quality of monitoring and inspections by operators, and strengthen the training of their ability to detect problems promptly. Operators need to analyze and compare parameter changes and keep an accurate understanding of the equipment’s operating status; otherwise, the purpose of reading meters, monitoring screens, and inspecting equipment is lost. 　　(5) Regular testing and rotation systems are an aspect of the \"two tickets and three systems\" that should not be overlooked; they represent an important means for operators to verify whether the operating and standby equipment are in good condition. The absence of backup equipment means the lack of an alternative mode of operation, thereby removing a safeguard for safe operation. Therefore, backup equipment should be treated as part of the operating equipment; efforts should be made to address any defects so that it remains in good condition. Otherwise, if the operating equipment fails, having few or no backup devices limits the operators’ options for dealing with the incident, which can often lead to an escalation of the problem.

Two types of tickets: switching operation ticket and electrical work ticket (work tickets are divided into the first type and the second type). Three systems: shift handover system, routine inspection system, and regular testing and switching system.

Work order, operation ticket； Shift handover system, routine inspection system, regular equipment testing and rotation system

Two types of tickets: work ticket, operation ticket； Three systems: shift handover system, routine inspection system, and regular equipment testing and switching system. I think it’s great that the moderator came up with this topic – it’s meant to remind power industry workers to keep safety in mind at all times! ! ! Go to work safely and return home happily!

Two types of tickets: work ticket, operation ticket； Three systems: shift handover system, routine inspection system, and regular equipment testing and switching system. I think it’s great that the moderator came up with this topic – it’s meant to remind power industry workers to keep safety in mind at all times! ! ! Go to work safely and return home happily!

Operation tickets, work tickets, shift handover system, routine inspection system, and regular equipment testing and rotation system.