20
Eaton 93PM Emergency Lighting UPS (50 kW, 480V Three and Four-Wire UL 924) Installation and Operation Manual P-164000569—Rev 03
33..22..22
U
UP
PS
S S
Syysstteem
m P
Poow
weerr W
Wiirriinngg P
Prreeppaarraattiioonn
NOTE
Refer to the
Eaton 93PM Sidecar Integrated Accessory Cabinet-Bypass Installation and
Operation (50 kW and 100 kW SIAC-B) Manual
, listed in paragraph
, for SIAC-B power wiring preparation and requirements.
Read and understand the following notes while planning and performing the installation:
WARNING
As a result of the connected loads high leakage current is possible. Connection to earth ground is required for
safety and proper product operation. Do not check UPS operation by any action that includes removal of the
earth (ground) connection with loads attached.
•
Refer to national and local electrical codes for acceptable external wiring practices.
•
To allow for future power upgrades, Eaton recommends installing the UPS using wiring and external
overcurrent protection breakers sized for the fully rated UPS kW frame size installed instead of the derated
kW ordered. Wiring for the maximum kW frame size will allow a full power rating upgrade without having
to modify the site wiring infrastructure.
•
For external wiring, use 75°C copper wire. Wire sizes listed in
are for copper wiring only. If wire is
run in an ambient temperature greater than 30°C, larger size wire may be necessary. Wire sizes are based
on using the specified breakers.
•
The AC output and output ground wiring to the critical load should be sized the same as the UPS rectifier,
bypass, and rectifier and bypass ground wiring if the recommended output breaker listed in
is not
installed in the system.
•
Recommended wire sizes are based on NFPA National Electrical Code
®
(NEC
®
) 70 Table 310.15(B)(16) 75°
C ampacity with 30°C ambient correction factors.
•
Three-wire UPS models do not use a neutral. Four-wire UPS models use a neutral for bypass input and
load output, but not for rectifier input.
•
The neutral conductor (if 4-wire) is sized the same as the phase conductor for balanced and resistive loads.
Non-linear loads, up to the maximum of 1.5x the load current, require a larger neutral conductor and should
be sized in accordance with NFPA NEC 70 Article 310.15(B)(5).
•
In three-wire applications connect the rectifier input, grounded Wye source or in single source applications,
to a three-wire High Resistance Ground (HRG) source. In three-wire applications, a neutral conductor is not
used from the rectifier source.
•
Supported single source, single or dual feed power sources:
–
3-wire grounded Wye (TN,TT)
–
3 or 4-wire grounded Wye (TN,TT) – Bypass Input
–
3-wire High Resistance Ground (IT)
–
3 or 4-wire High Resistance Ground (IT) – Bypass Input
•
Supported dual source, dual feed power sources:
–
3-wire grounded Wye (TN, TT)
–
3 or 4-wire grounded Wye (TN, TT) – Bypass Input
Содержание 93PM-50-1
Страница 112: ...P 16400056903 P 164000569 03 ...