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Liebert® EXM™ UPS 20-100kVA, 50/60Hz User Manual
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57
Table 19
AC/AC efficiency, loss and air exchange
AC/AC Efficiency
Data
Load on Inverter (dual conversion), %
95.5 maximum
Inverter Efficiency (DC/AC) (battery at nominal voltage 288VDC and full-rated linear load)
Rated Power, kVA
20-100
Load on Battery, %
94.8, Maximum
Heat Losses and Air Exchange
Rated Power, kVA
20
40
60
80
100
Load on Inverter, kW
0.9
1.8
2.7
3.6
4.5
No Load, kW
0.3
0.6
0.9
1.2
1.5
Maximum forced air cooling
(front intake, rear exhaust), L/sec (m
3
/hr)
32 (115)
64 (231)
96 (346)
128 (462)
160 (575)
Heat Dissipation, BTU/Hr (kWH)
Without Transformer
3843 (1.13)
7610 (2.23)
11,278 (3.30)
14,977 (4.39)
18,645 (5.46)
Table 20
Rectifier input
Parameter
20-100kVA
AC Input Parameters
50/60Hz, 3-Phase, 4-Wire Plus Ground
Rated AC Voltage
208/120V
220/127V
Input Voltage Range, Startup/Operating
177-253VAC
187-264VAC
Input Voltage Range, Operating
*
125-253VAC
132-264VAC
Frequency
50 or 60HZ (40-70Hz Range)
Power Factor
0.99 Full Load, 0.98 Half Load
THD
5% Full Load
* Derated operation for reduced input voltage: 208V Operation (125-177VAC), 220V Operation (132-187VAC)
Table 21
Battery DC intermediate circuit
Parameter
20 - 100kVA
Battery Bus Voltage
288
Number of Lead-Acid Cells
144 = (24 x 6 cell [12V] blocks), nominal
Float Voltage
2.25V/cell, selectable from 2.2 - 2.3V/cell
Temperature Compensation
-3.0mV/°C, selectable from 0 to -5.0mV/°C around 77°F (25°C) or 86°F (30°C) or inhibit
Ripple Voltage
≤1%
Ripple Current
≤5%
Boost Charge Voltage
2.35V/cell (selectable from 2.30-2.40V/cell)
Boost Control
Float-boost current trigger 0.050 C10 (selectable 0.030-0.070) Boost-float current trigger 0.010 C10 (selectable
0.005-0.025) 24 hr safety time-out (selectable 8-30 hr) Boost charge mode inhibit also selectable
End of Discharge
1.63 V/cell for lower EOD timer (10-45 minutes, 15 default)
1.75 V/cell for upper EOD timer. (46-180 minutes, 60 default)
Battery Charge Operation
2.35 V/cell (selectable from 2.3-2.4V/cell) Constant current and constant voltage charge mode Programmable
auto trigger or inhibit of boost mode
Battery Charging Power
Maximum Current
UPS (kVA) 20, 40, 60, 80, 100 Battery Charging Power (kW) 9, 12, 15
Maximum Charging Current (A) 9, 18, 27, 36, 45
Summary of Contents for Liebert EXM
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