Eaton 9395 Plus 1, Инструкция по установке и эксплуатации

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UPS INSTALLATION PLAN AND UNPACKING
Eaton 9395 Plus 1 UPS (225–275 kVA) Installation and Operation Manual
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164201710 Rev 2
www.eaton.com\powerquality 3-17
3.2.4 Distributed Bypass Power Wiring Preparation
Read and understand the following notes while planning and performing the
installation:
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All distributed bypass UPS rectifier inputs must come from one source and all
bypass input feeds must come from one source.
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All UPSs in the distributed bypass system must contain the same number of
UPMs. Mixed UPS kVA ratings are not permitted.
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Distributed bypass UPS input wiring size requirements and output wiring size
requirements from the UPSs to the tie cabinet or distribution panel are the same as
listed in Table 3‐4 on page 3-8 and Table 3‐5 on page 3-9.
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If the load requires a neutral, a bypass source neutral must be provided. If the load
does not require a neutral and there is no neutral conductor connected at the
bypass input, a neutral to ground bonding jumper must be installed. Install neutral
conductors from the UPSs to the common point of connection (tie cabinet), and
then install a system neutral to ground bonding jumper. The bonding jumper must
be copper wire. DO NOT install both a source neutral and a bonding jumper.
If the recommended system neutral bonding jumper installation method cannot be
accomplished, each UPS should have a separate neutral to ground bonding jumper
installed. See Table 3‐4 or Table 3‐5 for UPS neutral bonding jumper wire sizes. The
bonding jumper must be copper wire. DO NOT install both a source neutral and the
bonding jumper.
C A U T I O N
HIGH IMPEDANCE GROUND SOURCES - If the supply source is a high impedance ground (IT) type, the input
neutral conductor must be connected from the source of supply. If there is no output neutral connected to
the UPS, the neutral‐forming transformer kit may be used instead of pulling a neutral from the source. If the
load requires a neutral, then an input neutral conductor must be pulled into the UPS. In no circumstances
shall a neutral to ground bonding jumper be installed in the UPS.
C A U T I O N
DELTA SOURCES (TN‐S) - The 9390 UPS system can be operated only from a delta supply source that is fully
floating and if the neutral‐forming transformer kit is installed in the UPS. The UPS cannot be operated from a
mid‐point or end‐point grounded delta supply source. With this type of supply source, there is no capability
to provide an output neutral. In no circumstances shall a neutral to ground bonding jumper be installed in the
UPS.
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MOBs with dual auxiliary contacts are to be provided by the customer. Table 3‐14
on page 3-15 lists the recommended rating for the MOBs.
The tie cabinet must contain Module Output Breakers (MOBs) with dual auxiliary
contacts for control of the system. Without dual auxiliary MOBs, UPMs are not
allowed to go to bypass individually during servicing. All UPMs will go to bypass
instead of the just the UPM needing service, decreasing critical load protection.
With dual auxiliary MOBs, one UPM can be bypassed while the remaining UPMs
support the load as long as the remaining UPMs have the capacity to do so.