What are the two types of air circuit breakers?

The correct choice identifies the two main types of air circuit breakers: air magnetic and air blast. Air magnetic circuit breakers operate by using a magnetic field generated by the current flowing through the circuit to separate the contacts when a fault is detected. This type is typically used for low-voltage applications. On the other hand, air blast circuit breakers utilize a blast of compressed air to quickly extinguish the electric arc that forms when the circuit opens. This mechanism allows for faster operation and is often employed in high-voltage settings.

Understanding the distinctions between these types of air circuit breakers is essential for comprehending how electrical systems manage and interrupt power flow to ensure safety and reliability in various operating conditions.