35
06/10 MN03402004Z-DE/EN
About This Manual
This manual applies to motor-protective circuit-breakers
PKE12 and PKE32.
This manual describes the overload monitoring suitable for
the protection of motors in potentially explosive
atmospheres (Ex e areas).
Target group
This manual is aimed at specialist personnel who are
responsible for the installation, commissioning and
maintenance of the motor-protective circuit-breaker.
Abbreviations and
symbols
Symbols used in this manual have the following meanings:
CLASS
Tripping class
CPU
C
entral
P
rocessing
U
nit
Ex e
Ignition protection type “Increased Safety”
FIT
F
ailure
I
n
T
ime: Number of dangerous failures
in 10
9
hours
HFT
H
ardware-
F
ault-
T
olerance
MTTF
d
M
ean
T
ime
T
o
D
angerous
F
ailure
PL
P
erformance
L
evel
PTB
P
hysikalisch
T
echnische
B
undesanstalt,
German Federal Testing Laboratory: Accredited
certification authority for devices operated Ex e
areas
SIL
S
afety
I
ntegrity
L
evel
TSC
T
ransport
S
afety
C
onsult of the TÜV Rheinland
InterTraffic GmbH
Summary of Contents for PKE12 Series
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