Because these breaker require such high energy springs to close the contacts you would have a manual charging handle that must be operated numerous times in a ratcheting movement, pumped, to charge the spring. It can not be done in one motion like would be cone with a common industrial breaker. I don't know how many out there have had the privilege of closing a 2500a frame industrial molded case circuit breaker but it's very difficult if you don't have that handle extension installed.
So on both LV power and MV breakers they are designed such that you use a ratcheting movement to wind the spring then close the breaker with a simple push of a button.
These breakers can be closed electrically with a spring release solenoid and opened remotely with a shunt trip. The motor operated is added to recharge the spring when it discharges so that you don’t have to.
