Abstract
A circuit breaker often has a fault phenomenon in an electrical circuit, for example, its two contacts are kept away under a vibration environment. This will cause its electrical system not work normally. In the paper, a dynamical model is proposed for the circuit breaker applied with a low voltage under a vibration disturbance when the circuit breaker system is simplified as a cart-inverted pendulum system. Through some mechanical analyses, the nonlinear property of the circuit breaker is studied, and the fault phenomenon of the breaker in the vibration environment is described. With some simulations and experiments, the theoretical model is verified effectively when the circuit break is viewed as a switch in the electric system. Furthermore, the minimum amplitudes of a sinusoidal acceleration applied on the system to make the breaker have a fault phenomenon in the simulations are in good agreement with that in the experiments. Therefore, the dynamical model for representing the fault property of the circuit breaker is demonstrated feasibly with simulations and experiments.
Highlights
A circuit breaker is a basic low voltage device and is an important kind of switch used in power system
When the sinusoidal vibration acceleration is applied on the vibration platform, the blue line is gained from the model by MATLAB/Simulink and the red dotted data is collected from the experiment
A fault phenomenon of the circuit breaker is described in vibration environment
Summary
A circuit breaker is a basic low voltage device and is an important kind of switch used in power system. The breaker can turn on, bear and break the normal or overloaded current in a circuit within limited time It is widely used in the industrial installations, for example, rail systems, electric vehicles and ship fields. Describing the fault phenomenon of a circuit breaker in the vibration environment is very necessary for improving security in industrial electrical equipment. DYNAMICAL MODEL OF A FAULT PHENOMENON AND RELIABILITY ANALYSIS FOR A CIRCUIT BREAKER IN A VIBRATION ENVIRONMENT. A circuit breaker in a vibration environment is simplified as a cart-inverted pendulum system, a dynamical model is proposed by the Newton’s Second Law. And some simulations and experiments are carried out to verify the nonlinear model.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have