Optimization of the Switch Mechanism in a Circuit Breaker Using MBD Based Simulation

Area of Science:

• Electrical Engineering
• Mechanical Engineering
• Computational Dynamics

Background:

• Circuit breakers are crucial for electric power system protection against fault currents and system errors.
• The opening mechanism's speed is vital for preventing current overflow and ensuring system safety.

Purpose of the Study:

• To optimize the circuit breaker's switch mechanism for reduced current breaking time.
• To enhance the performance and safety of electric power systems through improved circuit breaker design.

Main Methods:

• Development of a multibody dynamic model for the circuit breaker, including its electromagnetic actuator and switch mechanism.
• Optimization of the switch mechanism by adjusting design parameters like latch length and shape to alter bearing pivot points.
• Validation of computational results through comparison with physical tests using a high-speed camera.

Main Results:

• The optimized circuit breaker mechanism demonstrated a reduction in opening time by 2.3 milliseconds.
• Computational simulations accurately predicted the performance improvements observed in physical experiments.

Conclusions:

• The study successfully optimized the circuit breaker's switch mechanism, leading to a faster opening time.
• The employed multibody dynamic modeling and optimization process can enhance future circuit breaker and contact-latch system designs.