Specifications
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5.0 SPECIFICATIONS
Table 6 Liebert NXL UPS specifications
250 300 400
Input Parameters
Input Voltage to Rectifier, VAC 480V 3-phase, 3-wire
Input Voltage to Bypass, VAC 480V 3-phase, 3-wire or 4-wire
Input Voltage Range, VAC
+10% to -15
-15% to -20%*
-20% to -30%**
<-30%***
Input Frequency, Hz 60
Permissible Input Frequency Range, Hz 55 to 65
Input THDi at Nominal Voltage at Full Load, % <10% with 6-pulse & Passive Filter
Power Walk-In, sec 3 to 30 (selectable) in 1 sec. Increment
Neutral Current 1.7 times full-phase current
Battery & DC Parameters
Battery Type
VRLA (Valve Regulated Lead Acid) or
(FLA) Flooded Lead Acid
Nominal Battery Bus, VDC 480V
Battery
Float Voltage, VDC 540V
Minimum End of Discharge Voltage, VDC 384V (for VRLA / Flooded Lead Acid)
DC Ripple Voltage in Float & Const V Ch. Mode, % <1 (RMS value) < 3,4% Vpp
Temperature Compensated Battery Charging Standard (with temperature probe)
Output Parameters
Inverter Type IGBT-based Sine-Sine PWM Controlled
Output Power, kW 225 270 360
Output Voltage, VAC 480V 3-ph, 4-w
Output Voltage Regulation, % < 1% (3-phase RMS average)
Output Voltage Regulation (100% Unb. Load) < 2% (3-phase RMS average)
Output Frequency, Hz 60
Output Frequency Regulation, % ± 0.1
Output THDu Linear Load at Nominal Voltage, % <2%
Output THDu at Nominal Voltage
Including a 100kVA Non Linear Load per EN 62040-3, %
2.5% (max)
Capacity to Handle High Crest Factor Load 3:1
Capacity to handle Step Load, % 0-100 or 100-0
Transient Recovery (linear loads), % Within 5% peak-to-peak in one line cycle.
Unbalance Loads Current Capacity 100% of nominal phase current
Capacity to Handle Leading PF Load
0.9 lag to Nom Subject to Max. kW rating
at 0.95 Lead Subject to Max. kW rating
at 0,9 Lead
Subject to 12.5% kW derate or same Rating
and 10°C Temp. Derate
Voltage Displacement, ° el 120° ±1° el (with 100% unbalanced load)
Compliance to FCC Class-A Standard
Overload Conditions, % FL
105% for 85 minutes
110% for 60 minutes
125% for 10 minutes
150% for 1 minute
* The UPS will operate at full load, but the battery charge will either be reduced or off (depending on input current).
** The UPS will operate at full load, but UPS may source share with the batteries (depending on input current).
*** UPS will be in Battery mode
