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8.2 Selecting redundancy or capacity mode
A parallel system is parameter selectable (available in 2002) between N+1 redundancy
and capacity modes. The parameters are displayed in the LCD control panel. Factory
default is the parallel system for N+1 redundancy where user gets an alarm if the +1
redundancy level is exceeded in the load.
8.3 Installation requirements
The system is designed with all vital parts accessible from front. Power cable entries are
from bottom. Separately from the power cabling, signal cable routing is recommended
through the hollow in the lower edge of right front door.
Power cables
All input cables, bypass cables, output cables and system bypass cables of the parallel
UPS system must be dimensioned according to local regulations.
U
P
S
P
W
9
3
4
0
8 -
I 0
P
W
9
3
4
0
1 -
0
I 0
P
W
9
3
4
0
1 -
3
I 0
U
P
S
P
W
9
3
4
0
8 -
I 0
P
W
9
3
4
0
1 -
0
I 0
P
W
9
3
4
0
1 -
3
I 0
Table 6. Output ratings of parallel UPS systems for a) redundancy or b) capacity.
1.
The cable must be able to carry the nominal current. Pay attention to proper
dimensioning of neutral (N) according to the load type.
2.
The cable must be rated for at least 70°C maximum operating temperature and
copper cables should be used to fit terminals.
3.
The cable must fulfil the requirements of the short circuit protection level with
the correct fuse size.
Note!
The total length of UPS bypass and output cables must be inside ±10% tolerances and the
same type. Due to the same cabling impedance, the equal cables mean equal load sharing
for the static bypass mode. Negligence of the instructions may cause the parallel UPS
system to lock in the bypass mode after overload or load transient situation.
1017397
Revision D (update)
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