36
Eaton Power Xpert 9395 UPS Installation and Operation Manual 164201716—Rev 13
Table 20. Recommended DC Input Circuit Breaker Ratings – Separate Battery
UPS Model
Input Rating
400V
480V
Power Xpert 9395-550/275
700A
700A
NOTE Because of the future upgradability to a fully rated 550 kVA UPS with the addition of the FI-UPM, these breaker sizes are
specified for 550 kVA.
Battery voltage is computed at 2 volts per cell as defined by Article 480 of the NEC. Rated battery current is
computed at 2 volts per cell.
The battery wiring used between the battery and the UPS should not allow a voltage drop of more than 1% of
nominal DC voltage at rated battery current.
33..22..55
U
UP
PS
S S
Syysstteem
m IInntteerrffaaccee W
Wiirriinngg P
Prreeppaarraattiioonn
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:
•
Use Class 1 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 Class 2 wiring methods (as defined by the NEC) for interface wiring up to 30V.
•
The wire should be rated at 24V, 1A minimum.
•
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 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.
