Common Faults and Cause Analysis of Intelligent Circuit Breakers(continued)

July 29,2022

At present, there are many new products about circuit breakers on the market, with a variety of new functions, so that circuit breakers have the capabilities of fault analysis, data diagnosis, historical information query and so on. With the addition of these new technologies, traditional circuit breakers have been continuously developed to become more intelligent and comprehensive. Such new circuit breakers usually have some specific interfaces that can be connected with the host computer to form a comprehensive automation system. The circuit breaker needs to analyze the cause of the current fault to judge the type of the fault, which needs to check the main factors that cause the fault of the intelligent circuit breaker and analyze the reasons.

Repair of circuit breakers

Maintenance is a common and important inspection method to ensure the normal operation of power equipment in the power system. The faults of the power system are accurately checked to ensure the safe and normal operation of the system. "After-event maintenance" refers to the limitation of various factors, the failure of the power system cannot be foreseen, and maintenance can only be carried out after the failure occurs. Troubleshooting is not performed under normal circumstances.

In general, a large number of data signals are the judgment basis for traditional fault diagnosis, but this method is susceptible to deviations due to external factors, and the acquisition process is extremely cumbersome. The acquisition of vibration signals and arc signals is easily affected by other factors. This will greatly reduce the accuracy of fault diagnosis of power equipment. In order to adapt to the development of circuit breaker intelligence, the fault detection and troubleshooting of circuit breakers also need to be checked by means of condition-based maintenance, and manual inspection is carried out after the power equipment fails.

Such a fault checking method greatly saves labor costs and material resources. Condition detection needs to be built on the basis of building a complete online monitoring platform, so that the shortcomings of traditional circuit breakers can be compensated by intelligent diagnosis. This new diagnostic method mainly extracts signal features through signal processing, and then processes these features accordingly or performs fault detection through neural network, fuzzy algorithm and particle swarm algorithm. Signal processing can be improved through intelligent algorithms, making the diagnosis of circuit breaker faults more accurate.

Breaker relay failure

The relay is composed of two main parts, the power system and the arc extinguishing system. The circuit breaker is connected or disconnected during the working process through the opening and closing of its contacts. Good contact can ensure that the circuit breaker will not overheat under the condition of rated current, so as to ensure the smooth operation of the system.

To analyze the comprehensive performance of the circuit breaker, the most direct method is to analyze the data of each typical fault of the circuit breaker. By analyzing the overall status of the circuit breaker, we can take appropriate measures to deal with the failure of the circuit breaker, and also predict the development trend of the circuit breaker to ensure the safety of the equipment. The complex structure of the circuit breaker causes many factors to affect its working state. The state of the circuit breaker is judged through a comprehensive analysis of the parameters of the circuit breaker, its characteristic quantities are collected, and the working state of the circuit breaker is judged through the analysis of the control quantity and the state quantity.