Description of device3906/10 MN03402004Z-DE/ENDescription of device Overload protection with motor-protective circuit-breakersThe PKE device is a three-pole motor-protective circuit-breaker with electronic wide-range overload protectiondesigned to monitor electric motors for overload.In the event of an overload trip, the PKE isolates all poles ofthe main circuit through trip block PKE-XTU(A)-… toimmediately stop the flow of current to the monitored motor.Figure 3: Circuit diagram for motor-protective circuit-breaker PKEwith trip block PKE-XTU(A)-…Setting range of the motor-protective circuit-breakerThe rated motor current of the PKE is set with the setting dial(a fig. 4).Figure 4: Rated motor current setting dialWith two basic devices (PKE12 for up to 12 A and PKE32 forup to 32 A), and four different electronic trip blocks, the PKEcan monitor motors with a rated current from 0.3 to 32 A(a table 1).I > I > I >L1 L2 L3T1 T2 T3-Q1...ACLASS