What is the difference between the SB Systems Breaker stored energy operating mechanism and the toggle mechanism used on Molded Case Circuit Breakers?
The mechanism currently used on a molded case circuit breaker (MCCB) is a quick-make-quick-break over center toggle that performs well on small frame MCCBs. The larger, heavier frame of the SB requires much more force to operate. The stored energy mechanism provides several benefits: (1) provides sufficient force to operate the heavy mechanism, (2) provides high speed operation for five-cycle closing times, and (3) provides the ability to perform an open-close-open cycle before the springs must be re-charged.
