Liebert NX 10kVA, Руководство по установке

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Figure 20 Connecting '1+1' system parallel control cables
5.4 Commissioning a Parallel System
Check the input and output wiring of each UPS module. Ensure that the phase rotation sequence of
the main inputs and the bypass inputs and outputs of each UPS module are the same. Ensure the
parallel cables are connected firmly.
It is assumed that the installation is complete, the system has been commissioned by authorized per-
sonnel and the external power isolators are closed. Before startup, disconnect the load.
Start the UPS modules separately and set the parameters of each UPS module through configuration
software. Pay particular attention to the parameters directly relevant to the parallel system:
• UPS Configuration: Each UPS module belonging to the parallel system should be set as Parallel
configuration.
• UPS ID No.: Each UPS module should have a unique identification number in the parallel sys-
tem.
• Parallel system requisite UPS units: Set the minimum number of UPS modules to support the
user’s expected load. For 1+1 systems this settings needs to be set to 1.
• Parallel system redundant UPS units: Set the redundant number of UPS modules which will not
cause the parallel system transfer to bypass even if they get failure during operation. For 1+1 sys-
tems this settings needs to be set to 1.
Table 6 Key to UPS control cable connections
! - " UPS unit
Parallel connection board
# Interconnecting cables
!
CAUTION
The operations described in this section must be performed by authorized electricians or
qualified technical personnel. If you have any difficult, do not hesitate to contact Liebert
Global Service at 1-800-LIEBERT .
NOTE
The settings should be the same for all modules within the parallel system,
except the UPS ID number.
#
$
!
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"