The ability to remove the arc speedily from the system is paramount because sustained arc can erode the contacts leading to excessive heat and eventual breakdown of the the circuit breaker. This is undesirable as it would not only lead to power interruption but waste of manpower time, energy with regards to replacement but the cost of circuit breaker replacement is somewhat high. Once gain, you deliver it with clarity .Wonderful pictorial description, I must say. Looking up to see more of it in the coming days. Kudos.