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TS_622_02 PowerWAVE 9500DPA User Manual 26/2/19
4.5.2 Parallel cabinet cabling recommendations
In a parallel cabinet installation all the UPS cabinets must be supplied from the same mains power source and the cables
from the UPS input supply panel to each cabinet should be of equal length. Similarly, the cables connected to the UPS
system output panel should be of equal length as shown in Figure 4.4 – this helps to balance the load sharing between the
cabinets.
Figure 4.4 Parallel cabinet cabling recommendations
Input neutral grounding
A permanently connected input neutral is
required to enable the rectifier to operate
correctly and allow the UPS to function properly
when operating on battery. The input neutral
must also be grounded to permit correct
operation when the UPS is running on battery.
Key Point:
As the input neutral must
be unswitched and connected to the
UPS at all times. DO NOT use, a 4-
pole input switch or isolator at the LV
Distribution board on a TN-S system.
Bypass Input
Rectifier Feed
Bypass Feed
Incorrect
Correct
Mains Input
UPS SYSTEM INPUT SUPPLY
UPS SYSTEM INPUT SUPPLY
UPS SYSTEM OUTPUT
UPS SYSTEM OUTPUT
0V
230V
UPS
Figure 4.5 Permanent, grounded input neutral