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01/11 MN03402002Z-DE/EN
About this manual
This manual applies to the PKZM4/XTPR…DC1 motor-
protective circuit-breakers.
It describes the overload monitoring system for the protec-
tion of motors operating in potentially explosive atmo-
spheres (Ex e areas).
Target group
This manual is aimed at specialist personnel who are
responsible for the installation, commissioning and mainte-
nance of the motor protective circuit breaker.
Abbreviations and
symbols
Symbols used in this manual have the following meanings:
X
Indicates instructions to be followed
Ex e
Ignition protection type “Increased Safety”
PTB
P
hysikalisch
T
echnische
B
undesanstalt.
German Federal Testing Laboratory:
Accredited certification authority for devices
operated in Ex e areas.
NM
Lowest possible setting current
HM
Highest possible setting current
h
Draws your attention to interesting tips and supplemen-
tary information.
h
Caution!
warns of the risk of material damage.
j
Danger!
warns of the possibility of serious damage and slight injury
or death.
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