1 PKZM0-…/XTPR…BC1NL, PKZM0-…-T/XTPT…BC1NL motor-protective circuit-breakers
1.2 Device overview
PKZM0-…/XTPR…BC1NL, PKZM0-…-T/XTPT…BC1NL
01/22 MN03402003Z-DE/EN
www.eaton.com
25
1.2 Device overview
Figure 1: PKZM0-…/XTPR…BC1NL and PKZM0-…-T/XTPT…BC1NL
motor-protective circuit-breakers
a
Motor current dial
b
Testing element
1.3 Description of device
1.3.1 Overload protection with motor-protective circuit-breakers
The PKZM0-…/XTPR…BC1NL, PKZM0-…-T/XTPT…BC1NL series are
3-phase electromechanical motor-protective circuit-breakers with bimetallic
release for overload monitoring.
The PKZM0-…/XTPR…BC1NL, PKZM0-…-T/XTPT…BC1NL motor-protective
circuit-breaker disconnects all phases from the main circuit when an overload
occurs. The power flow to the monitored motor is thus switched off directly.
Figure 2: Circuit diagram of the PKZM0-…/XTPR…BC1NL,
PKZM0-…-T/XTPT…BC1NL motor-protective circuit-breakers
a
b
L1
L2
L3
T1
T2
T3
-Q1
I > I > I >