1. Frame circuit breaker trip and re-shutdown fault:

First, determine if the frame circuit breaker is a non-accident trip. Non-accident tripping means tripping without short circuit and overload faults. There are many reasons why the frame type circuit breaker cannot be closed. First of all, it is necessary to analyze and determine whether the tripping is caused by short circuit and overload problems, or whether a circuit breaker itself or the control system circuit is faulty. Determine the cause of the fault according to the following steps. First, observe whether the primary line has become black, the wire and contacts are burned, there is no peculiar smell, and whether the secondary control circuit related to the low-voltage cabinet is faulty. If a fault point is found, the circuit breaker can still operate normally after removal; if no obvious fault point is found, the circuit breaker can be closed under no-load condition; if the circuit breaker cannot be put into operation after tripping, the frame circuit breaker itself is faulty ; If the circuit breaker is closed, the circuit breaker itself is not faulty. Then detect branch line faults in turn.

2. The intelligent system controller of the frame circuit breaker passes the fault:

After the intelligent system controller of the rack circuit breaker fails, there are generally environmental protection and ecological function failures such as manual closing failure, electric vehicle closing failure, and three-stage protection management function failure. Intelligent controller failure problem analysis Enterprises are generally burned due to excessive voltage in different countries in my country. In accordance with the requirements of China's continuous development and relevant technical enterprise management standards, the rated voltage provided by the rated staff is designed according to the standard system of 400V, but in the actual operation of the market economy system, when the electricity consumption drops in the second half of the night, if the transformer is not For voltage regulation, the voltage will often be able to reach 420V and above, and the capacity will cause the intelligent controller to burn out due to high voltage. In addition, the controller also has such a common problem in such an enterprise. The more common problem is the fault memory. If our students cannot learn effectively, the problem can be cleared in time. Even if the power grid fault has been eliminated and solved, the circuit breaker still thinks that there is a fault in the traditional power grid in China, and the manual and electric power will converge. Not on the gate. At this time, only according to the operation in the company's manual, clear the fault memory, and then reset, in order to work normally. General corporate accounting staff not only do not think that it is because of Chinese socialism that the gate cannot be closed, and often cannot find the main reason for the failure, or know that there is an important reason for this, but because the clearing operation process is too complicated, they can only find professional theory Knowledge of information technology to conduct research designers, brings a lot of unnecessary power outages. The solution is that frame circuit breaker manufacturers should develop a simpler, more intuitive, more voltage-tolerant controller operation, and strengthen technical education and training for operators and maintenance personnel.