Ups System Interface Wiring Preparation - Eaton Power Xpert Plus 1 Installation And Operation Manual

3.2.3

UPS System Interface Wiring Preparation

Control wiring for features and options should be connected at the customer interface
terminal blocks located inside the UPS.
Do not directly connect relay contacts to the mains related circuits. Reinforced insulation to the mains is
required.
Read and understand the following notes while planning and performing the
installation:
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Power Xpert 9395 UPS (450–550 kVA) Installation and Operation Manual
Use Class 1 wiring methods (as defined by the NEC) for interface wiring up to 30V.
The wire should be rated at 24V, 1A minimum.
Use Class 2 wiring methods (as defined by the NEC) for interface wiring from 30V
to 600V. The wire should be rated at 600V, 1A minimum and 12 AWG maximum.
Use shielded twisted‐pair wires for each input and return or common.
All interface wiring and conduit is to be provided by the customer.
When installing external interface wiring (for example, building alarm, relay output,
battery breaker trip, and X-Slot) to the UPS interface terminals, conduit must be
installed between each device and the UPS cabinet.
Install the interface wiring in separate conduit from the power wiring.
When installing internal interface wiring to X-Slot terminals, route the wiring
through the internal opening in the X-Slot communication bay.
All building alarm inputs or remote features require an isolated normally‐open
contact or switch (rated at 24 Vdc, 20 mA minimum) connected between the alarm
input and common terminal. All control wiring and relay and switch contacts are
customer‐supplied.
The building alarms can be programmed to display the alarm functional name.
LAN and telephone drops for use with X-Slot connectivity cards must be provided
by the customer.
The UPS battery aux and 48 Vdc shunt trip signal wiring from the UPS must be
connected to the DC source disconnect device.
Battery aux and 48 Vdc shunt trip wiring should be a minimum of 18 AWG.
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.
UPS INSTALLATION PLAN AND UNPACKING
W A R N I N G
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164201701 Rev 4
3-17