Eaton 93PM-50-1, Инструкция по установке и эксплуатации, Страница: 31 / 112

Eaton 93PM Emergency Lighting UPS (50 kW, 480V Three and Four-Wire UL 924) Installation and Operation Manual P-164000569—Rev 03 21
CAUTION
SINGLE HIGH IMPEDANCE GROUND SOURCE – In North American installations, the neutral conductor from
the high impedance ground source of supply CANNOT be used.
• Phase rotation must be clockwise starting with phase A (rotation A, B, C).
• If four–wire UPS, the bypass feed into this equipment uses four wires, otherwise three wires. The rectifier
feed into this equipment uses three wires. The phases must be symmetrical about ground (from a Wye
source, phase rotation clockwise A, B, C) for proper equipment operation.
• If installing an external maintenance bypass, all feeds to the UPS including the Rectifier Input Breaker (RIB)
(if installed) must have a service disconnect independent of the maintenance bypass power path. Most
maintenance bypass solutions provide UPS input feeds derived from but isolated from the maintenance
bypass power path. If the maintenance bypass solution being installed does not provide such functionality,
DO NOT use a single feeder breaker to supply both the UPS and the maintenance bypass.
For external wiring recommendations, including the minimum AWG size of external wiring, see Table 5 . Wire
sizes listed are for copper wiring only.
Table 5. Input/Output Ratings and External Wiring Recommendations for the Eaton 93PM-50-1
Basic Unit Rating
Units
Rating 50/60 Hz
kW 20 30 40
Input and Output Voltage Volts 480/480 480/480 480/480
AC Input to UPS Rectifier (0.99 Minimum pF)
Full load current plus battery recharge current
(3) Phases, (1) Ground
A
Amps 48 60 73
Minimum Conductor Size (Phase A, B, and C)
Number per Phase
AWG or kcmil (each)
6
(1)
4
(1)
3
(1)
Minimum Conductor Size (Ground)
Number
–
AWG or kcmil (each)
8
(1)
8
(1)
8
(1)
AC Input to UPS Bypass (Dual-Feed)
Full Load Current
(3) Phases, (1) Neutral (if 4-Wire), (1) Ground
B
Amps 48 60 73
Minimum Conductor Size (Phase A, B, and C, and
Neutral)
Number per Phase
AWG or kcmil (each)
4
(1)
3
(1)
2
(1)
Minimum Conductor Size (Ground)
Number
–
AWG or kcmil
(each)
8
(1)
8
(1)
8
(1)
DC Input from External Battery (Line-Up-and-
Match Eaton 93PM IBC)
(1) Positive, (1) Negative, (1) Ground
C
Voltage
Total Amps
480
45
480
67
480
89
Minimum Conductor Size (Phase Positive and
Negative)
Number per Pole AWG or kcmil
(each)
2/0
(1)
See Note
2/0
(1)
See Note
2/0
(1)
See Note
Minimum Conductor Size (Ground)
Number
–
AWG or kcmil
(each)
4
(1)
4
(1)
4
(1)
UPS Installation Plan and Unpacking