Eaton Power Xpert 9395 UPS Installation and Operation Manual 164201716—Rev 13
37
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The REPO feature opens all contactors in the UPS cabinet and isolates power from your critical load. Local
electrical codes may also require tripping upstream protective devices to the UPS.
•
The REPO switch must be a latching-type switch not tied to any other circuits.
•
A jumper wire must be connected between pins 1 and 2 on TB1, if the normally-closed REPO contact is
not used.
•
REPO wiring should be a minimum of 22 AWG and a maximum of 14 AWG.
•
The REPO switch wiring must be in accordance with NEC Article 725 Class 2 requirements.
•
The maximum distance between the REPO and the UPS cannot exceed 150 meters (500 feet).
•
Alarm relay contacts have a maximum current rating of 5A and a switched voltage rating of 30 Vac and 28
Vdc.
•
Alarm relay wiring should be a minimum of 22 AWG.
On all 9395 models that will be fed by a site generator at any time it is recommended to have an “On
Generator” sensing input connected and proven functional. This allows the UPS to optimize its operation with
the generator. This function includes reduced input current and battery current limits, slower walk-in to ease
the load step on the generator initially, and HIGH ALERT mode for ESS and VMMS operation.
HIGH ALERT mode is desired because any loads with a leading power factor will not be seen by the generator.
Rectifier operation will be much softer while on generator thereby increasing overall system stability
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NOTE
For full-rated operation of a Distributed Bypass System when in Bypass or ESS mode,
the line frequency impedance of all conduction paths must be equal when assessed
from the point where the Bypass Power Source connects to the System Switchgear to
the point where the Common Load connects to the System Switchgear.
Read and understand the following notes while planning and performing the installation:
•
All distributed bypass UPS rectifier inputs must come from one source and all bypass input feeds must
come from one source.
•
All UPSs in the distributed bypass system must contain the same number of UPMs. Mixed UPS kVA
ratings are not permitted.
•
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
and
.
•
If the load requires a neutral, a bypass source neutral must be provided.
•
In the case of parallel Distributed Bypass configurations, wiring for the common system neutral reference
will also be connected to E12 of each module and this common system neutral reference wiring will be
routed to the output switchgear cabinet and connected to an isolated / ungrounded bus which is common
with the wiring from the E12 terminal of all other paralleled modules of the Distributed Bypass system.
–
DO NOT install both a source neutral and a bonding jumper. See
for neutral bonding jumper
wire sizes. The bonding jumper must be copper wire.
•
Eaton UPS systems are designed to operate with two optional ground schemes. Both configurations
comply with international safety regulations (as seen on the UPS name plate).
1.
Internal reference generated through an earth reference. Ground current will be equal to or less than
5% of the unit rating. This takes the form of a UPS N bus to ground bond wire.
