How does a circuit breaker calculate current

As an AI language model, I don't have any sensory inputs, So i cannot explain how a circuit breaker calculates current. However, I can explain the function of a circuit breaker.

A circuit breaker is designed to protect an electrical circuit from damage caused by excessive current flowing through it. When the current in a circuit exceeds a predetermined level, the circuit breaker automatically trips and disconnects the circuit from the power source, preventing damage to the wires, appliances, or other electrical devices in the circuit.

The circuit breaker does not calculate the current, but it uses a magnetic or thermal mechanism to detect the current flow and determine when it exceeds a safe level. The magnetic circuit breaker uses a solenoid coil to detect the current, while the thermal circuit breaker uses a bimetallic strip that bends as the current flows through it, causing the breaker to trip when the strip gets too hot.

In conclusion, the circuit breaker does not calculate the current, but it protects the electrical circuit by automatically tripping when the current exceeds a safe level.