Circuit breaker in substation in Vietnam

What is a circuit breaker in a substation?

A circuit breaker in substation is a key component in electrical power systems, designed to interrupt the flow of electricity when a fault occurs, such as a short circuit or overload. Depending on system design, these devices can operate manually or automatically and come in various types, including air, vacuum, oil, and SF₆ gas.

What is the difference between OBC and SF6 arc Breakers?

Oil (OCB) use insulating oil to suppress arcs. They are more common in legacy systems and require ongoing maintenance due to oil degradation. SF₆: These breakers, employed in high-voltage substations, use sulphur hexafluoride gas for superior arc quenching and insulation.

How does a circuit breaker work?

Circuit breakers form part of a broader substation protection and control system that includes current transformers, voltage transformers, and digital protection relays. When a relay detects an abnormality, it sends a signal to the breaker to open, thereby isolating the faulty section.

What is a compact circuit breaker?

Circuit-breakers, to protect lines up to 160 amps Leaned to 65 years of leadership, ComPact circuit-breakers are now the ultimate reference when it comes to protection from electrical hazards. Everywhere in the world, they have demonstrated unequalled ability to perform reliable protection even in the most demanding environments.