Mechanical interlock with overtravel compensation for coordinating operation of circuit breakers

An interlock for coordinating operation of electric power switches each having a switch state indicator movable between a switch open position and a switch closed position and an auxiliary trip member movable between an unactuated and an actuated position, said interlock comprising:

• indicator followers each following an associated state indicator on an associated electric power switch;
• auxiliary trip member actuators each positioned adjacent an associated auxiliary tip member on an associated electric power switch;
• elongated connecting members;
• first couplers each coupling one end of an associated elongated connecting member to an associated indicator follower on a respective one of said electric power switches;
• and
• second couplers each coupling the other end of an associated elongated connecting member to an associated auxiliary trip member actuator on a respective other electric power switch to actuate said auxiliary trip member on the respective other electric power switch to said actuated position when said state indicator on the respective one electric power switch movers to said closed position;
• said first couplers each comprising a compliant member allowing initial movement of the associated state indicator on the respective one electric power switch before movement of the associated elongated connecting member and overtravel of the state indicator,
• wherein said Indicator followers each comprise a follower member and a biasing spring biasing said follower member against said state indicator.