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BETA Protecting
Residual Current Protective Devices
SIQUENCE 5SM3, 5SU1 universal
current-sensitive type B
2/13
Siemens ET B1 · 10/2008
2
*
You can order this quantity or a multiple thereof.
Versions
Super resistant
æ
Short-time delayed tripping in the case of transient leakage
currents. High surge current withstand capability: > 3 kA.
Selective
î
:
Can be used as upstream group switch for selective tripping
contrary to a downstream, instantaneous or super resistant
RCCB.
Configuration
DIN VDE 0100-530 "Selection of protective devices" also describes
the configuration of systems with residual current protective devices.
EN 50178 (DIN VDE 0160) "Equipping power installations with
electronic equipment" describes, among other things, how to
select the type of residual current protective device suitable.
When configuring and installing electrical installations, electrical
loads that can generate smooth DC residual currents in the event
of a fault must be assigned a separate electrical circuit with a
universal current-sensitive residual current protective device
(
type B).
It is not permitted to branch electrical circuits with these types of
electrical loads after pulse-current-sensitive residual current
protective devices (type A):
S
n
n
n
≥
≤
≥
I2_13610a
Type
AC/A
300
mA
Type
AC/A
100
mA
Type
B
30
mA
Wh
230/400
V AC,
3-
phase
Wh
Type
AC/A
n
300
mA
Type
AC/A
n
100
mA
Type
B
n
30
mA
≥
≤
≥
S
I2_13611a
230/400
V AC,
3-
phase
-25
(
Type B)
© Siemens AG 2008