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What is meant by "True Two-step Stored Energy Mechanism"?

What is a two-step stored energy mechanism?

Product Line:
Circuit Breakers

A two step stored energy mechanism is a mechanism for closing a breaker where a spring is charged (first step) and then an action is performed (second step) to close the breaker.

Masterpact circuit breakers are operated via a stored-energy mechanism which can be manually or motor charged. The closing time is less than five cycles. Closing and opening operations can be initiated by remote control or by push buttons on the circuit breaker front cover. An O-C-O (open-close-open) cycle is possible without recharging.
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