PKE Motor Protective Circuit Breakers Motor-protective circuit-breakers PKE with electronic wide-range overload protection provide the highest level of flexibility featuring a compact and modular design with its plug-in control unit. Wide current setting ranges Plug-in trip blocks up to 65 A Expandable using the existing system accessories from the system xStart SmartWire-DT interface increases the levels of system availability by the transfer of process-relevant data Worldwide approved system components and accessories