PKZM0 motor-protective
circuit-breakers
24
04/06 AWB1210-1458D/GB
Overview of the devices
Figure 1: PKZM0 motor-protective circuit-breakers
a
Motor current dial
b
Testing element
Unit description
Overload protection with motor-protective circuit-
breakers
The PKZM0 series are 3-phase electromechanical motor-
protective circuit-breakers with bimetallic release for
overload monitoring.
The PKZM0 disconnects all phases from the mains circuit
when an overload occurs. The current flow to the monitored
motor is thus switched off directly.
Figure 2: Circuit diagram of the PKZM0 motor circuit-breaker
a
b
I
>
I
>
I
>
L1 L2
L3
T1
T2 T3
-Q1
