Ups System Interface Wiring Preparation - Eaton Power Xpert 9395P-900 Series Installation And Operation Manual

UPS Installation Plan and Unpacking
3.2.4

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.
Ne pas directement brancher les contacts de relais aux circuits du réseau. Une isolation renforcée
des réseaux est nécessaire.
Read and understand the following notes while planning and performing the installation:
Use Class 1 wiring methods (as defined by the NEC) for interface wiring from 30V to 600V. The wire should
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be rated at 600V, 1A minimum and 12 AWG maximum.
Use Class 2 wiring methods (as defined by the NEC) for interface wiring up to 30V. The wire should be rated
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at 24V, 1A minimum. When Class 2 circuit wiring must be mixed with Class 1 wiring, use Class 1 wire and
wiring methods.
Use shielded twisted-pair wires for each input and return or common.
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All interface wiring and conduit is to be provided by the customer.
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When installing external interface wiring (for example, building alarm, relay output, battery breaker trip, and
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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.
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When installing internal interface wiring to X-Slot terminals, route the wiring through the internal opening in
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the X-Slot communication bay.
All building alarm inputs or remote features require an isolated normally-open contact or switch (rated at 24
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Vdc, 20 mA minimum) connected between the alarm input and common terminal. All control wiring and
relay and switch contacts are customer-supplied and may need to use Class 1 wiring, see above.
The building alarms can be programmed to display the alarm functional name.
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LAN drops for use with X-Slot connectivity cards must be provided by the customer and may need to use
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Class 1 wiring, see above.
The UPS battery aux signal wiring from the UPS must be connected to the battery disconnect device.
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A supplemental 48 Vdc shunt trip signal for the battery disconnect device is provided, but is not required for
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normal operation.
Battery aux and 48 Vdc shunt trip wiring should be a minimum of 18 AWG.
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The REPO feature opens all contactors in the UPS cabinet and isolates power from your critical load. Local
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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.
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A jumper wire must be connected between pins 1 and 2 on TB1, if the normally-closed REPO contact is not
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used.
REPO wiring should be a minimum of 22 AWG and a maximum of 14 AWG.
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The REPO switch wiring must be in accordance with NEC Article 725 Class 2 requirements.
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3-38 Eaton Power Xpert
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9395P-900 UPS Installation and Operation Manual P-164000501—Rev 09
WARNING
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