Installation Into The Cabinet; Back-Up Fuse - Siemens SIPLUS PSU Operating Instructions Manual

6.2 Installation into the cabinet

When operating the SIPLUS PSU in I & C cabinets the installation in the lowermost tier is recom-
mended. The supply cables and transfer cables to the neighboring cabinet are connected vertically
from below.
The SIPLUS PSU is designed for wall mounting, holm mounting and for installation in racks and cab-
inets. The fixing dimensions are designed according to chapter 5.1 "Mechanics".
The SIPLUS PSU has to be installed exclusively in plants with limited admission (according to
EN 60950-1). This ensures that exclusively repairer (according to EN 60950-1) with sufficient tech-
nical instruction and experience have access to this installation.
For further instructions to installation and commissioning see chapter 7 "Commissioning"

6.3 Back-up fuse

The SIPLUS PSU has to be operated only with sufficient back-up fuse.
Figure 13: Operation with back-up fuse
In this case the potentials L1 and L2 have to be provided with external fuses (F1ext and F2ext) like
shown in the figure 13.
Dimensioning of the back-up fuse:
Recommended back-up fuse
Rated current
Rated voltage
Rated cut-off capability
Cut-off I²t value I²t
A
Pre-arcing I²t value I²t
for reasons of the selectivity
If necessary the nominal current and the cut-off integral of the back-up fuse for the line protection of
the conductor to the supply terminals (X101 – X104) as well as for the line protection of the conduc-
tors to the branch terminals (X105 – X108) has to be dimensioned less.
SIPLUS PSU Power Supply Unit
Copyright (C) Siemens AG 2018
NEOZED 5SE2 63 A
max. 63 A
min. 60 V DC
min. 2000 A
max. 16000 A² s (t
min. 3000 A² s (t
S
= 4 ms)
A
= 4 ms)
S
A5E00854207E
V 8.00 released
SIPLUS PSU (6DL3500-8BA)
20 of 30
2018-05-03