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6.4
UPS Electrical Characteristics
6.4.1
Battery Manufacturers and Models
Either of two manufacturers' batteries will be installed in the Liebert NX for 10-30 kVA 208V NX as
shipped. Below are the battery makers and the models they supply.
Table 10
Approved batteries
Battery Manufacturer
Enersys Yuasa
C&D Dynasty
6.4.2
Input Rectifier
Table 11
Rectifier input power
Rated Voltage, VAC
Supply
Input Voltage Tolerance, VAC (without derating)
Frequency, Hz
Input Frequency Tolerance %
Power Factor
Harmonic Current
Rated Power (208V), kVA
1
Input Current,
Nominal, A
Output Current, Nominal, A
Notes
1. Overload capacity of input current:
6.4.3
DC Intermediate Circuit
Table 12
DC intermediate circuit
Rated Power
Voltage range for inverter operation,
VDC
Recommended number of lead-acid batteries
Recommended float charge voltage
Recommended boost charge voltage
Recommended end of discharge voltage
Maximum recharge battery current, A
Maximum boost charge duration, min.*
Boost-float threshold current, A*
Temperature voltage compensation, mV/°C*
Ripple voltage superimposed %
* Set by configuration software
Models Supplied
NPX-80FR
UPS12-100FR
Rated Power
NPX-100FR
NPX-150FR
UPS12-140FR
-
10kVA
15kVA
3-phase, 4-wire plus ground
≤ 0.99 at full load
≤ 0.95 at 50% load
Less than 4% at full rated UPS output load
10
15
28
42
28
42
100% Imax <I<125% Imax:
125% Imax <I<150% Imax:
I>150%:
10kVA
15kVA
DC voltage is positive 210V and negative 210V for 200/208 input
and output in normal mode
NOTE: When the DC bus voltage is less than 190V between
positive and negative, the UPS will transfer to battery mode.
Number of batteries is field-selectable from 20 to 24 jars (12V per
jar), or from 120 to 144 cells (2V per cell) when battery type is
VRLA. The unit is shipped with a nominal voltage of 324VDC.
7.5
42
20kVA
30kVA
120/208
166-228
50 / 60
±10
20
30
56
83
56
83
10 min.
1 min.
Limits input current immediately
20kVA
2.25VDC*
2.3VDC*
1.65-1.8 VDC
7.5
15
1440
0.1 C default
2
≤ 1
Specifications
30kVA
15
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