Specifications and Technical Data
69 Liebert
®
eXM
™
Table 31 Inverter output to critical load
Parameter 60-100 kVA
Rated AC Voltage 208/120V or 220/127V, 50/60Hz, 3-Phase, 4-Wire Plus Ground
Frequency * 50/60Hz
Overload Capacity
105% load, continuous
110% load, 60 min
125% load, 10 min
150% load, 60 sec
Fault Current Short circuit for 200 ms
Non-Linear Load Capability 100%
Neutral Current Capability 170%
Steady State Voltage Stability ±1% (balanced load)
Voltage Regulation
±1% for balanced load
±5% for 100% unbalanced load
Phase Balance
120° ±1° for balanced load
120° ±15°± for 100 unbalanced load
Transient Voltage Response 5%
THD
<1.5% (0-100% linear load)
<5% (0-100% non-linear load)
Sync Frequency Range Rated frequency ± 2Hz (selectable ± 0.5 to ± 3Hz)
Frequency Slew Rate 0.1-3Hz
Frequency Regulation
±0.1% (single Liebert Power Module Assembly)
±0.25% (five Liebert Power Module Assemblies)
Voltage Adjustment Range ±5%
* Factory set to 60Hz; 50Hz selectable by commissioning engineer. Frequency converter operation is also selectable.
Table 32 Bypass input
Parameter 60-100 kVA
Rated AC Voltage 208/120V or 220/127V, 50/60Hz, 3-Phase, 4-Wire Plus Ground
Rated Current: 208V 167/222/278
220V 157/210/262
Overload 110% load, Continuous
Upstream Protection, Bypass Line Thermomagnetic circuit-breaker, rated up to 125% of nominal output current
Current Rating of Neutral Cable, A 1.7*ln
Frequency, Hz 50 or 60
Transfer Time Between Bypass
and Inverter, ms
Uninterrupted transfer: <1ms
interrupted transfer: <20ms(40,60,80,100, can be selected)
Bypass Voltage Tolerance, %VAC
Upper limit: +10, +15 or +20, default +15
Lower limit: -10, -20, -30 or -40; default: -20 (delay time to accept steady
bypass voltage: 10 sec)
Bypass Frequency Tolerance, % +/- 10% or +/- 20% default: +/- 20%
Synchronization-Window
±0.5, 1,2,3Hz
default value: ±2Hz
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