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09/15 MN03407005Z-DE/EN
About this manual
This manual applies to the ZB65/XTOB…DC1 and
ZB150-.../XTOB…GC1 overload relays.
It describes the overload monitoring system for the
protection of motors operating in potentially explosive
atmospheres Ex e areas.
Target group
This manual addresses qualified personnel who install,
commission and service the motor overload relay.
Abbreviations and
symbols
Symbols used in this manual have the following meanings:
X
indicates actions to be taken.
Ex e
Type of protection “Increased Safety”
HFT
Hardware-Fault-Tolerance
HM
Highest possible set current
NM
Lowest possible setting current
PL
Performance Level
PTB
P
hysikalisch
T
echnische
B
undesanstalt
German Federal Testing Laboratory:
(Accredited certification authority for devices
operated in Ex e areas)
SIL
Safety integrity level
h
draws your attention to interesting tips and supplemen-
tary information.
h
Caution!
warns of the risk of material damage.
Содержание ZB65 Series
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