Primary function of a circuit breaker
The primary function of a circuit breaker is to:
Protect people and equipment from electrical shock and damage
A circuit breaker is an automatic electrical switch designed to interrupt the flow of electrical current in a circuit when it exceeds a certain level, known as the trip point. This is typically set to a level that is slightly above the maximum expected current draw of the circuit, to prevent overheating, arcing, or other electrical hazards.
When a circuit breaker trips, it opens the circuit, disconnecting the power supply to the load (e.g., lights, appliances, etc.). This prevents:
- Electrical shock: By interrupting the flow of current, the circuit breaker prevents electrical shock or electrocution.
- Fire: By preventing overheating or arcing, the circuit breaker reduces the risk of electrical fires.
- Equipment damage: By disconnecting the power supply, the circuit breaker prevents damage to electrical equipment, such as motors, transformers, or wiring.
In summary, the primary function of a circuit breaker is to provide a safe and reliable means of protecting people and equipment from electrical hazards by automatically interrupting the flow of current when it exceeds a certain level.