Emerson Liebert NX 50 and 60 Hz - Manual (Page 130)

Technical Specifications
118
Table 38 Inverter output to critical load
Rated Power
(load pf 0.8 lag)
kVA 30 40 60 80 100 120 140 160 200
(load pf unity) kW 24 32 48 64 80 96 112 128 160
(load pf 0.9 lead) kVA 24 32 48 64 80 96 112 128 160
Rated AC Voltage
1 V (ac)
380/400/415 V
(three-phase, four-wire with neutral referenced to the bypass neutral)
Frequency
2
Hz 50 / 60
Overload % rated
110% for 60 min
125% for 10 min
150% for 1 min
225% for 200 msec
Fault Current % rated 320% current limitation for 200 msec
Non linear load capability
4
% rated 100%
Neutral current capability % rated 170% 152% 135%
Steady state voltage stability 5 %
± 1 (balanced load),
± 2 (100% unbalanced load),
Transient voltage response 6 % ± 5
Total Harmonic Voltage Distortion
(THDV)
4
%
< 1 (linear load)
<3.5 (non linear load, 380V)
<4.0 (non linear load, 400V
< 4.5 (non linear load, 415V)
Synchronisation - Window
- Slew Rate (Max change rate of
synch frequency)
Hz Rated frequency ± 2 Hz (selectable ± 0.5 to ± 3Hz)
Hz/sec
1 Hz/sec
selectable 0.1 to 3Hz/s (single UPS), 0.2Hz/sec (paralleled.UPS)
Inverter Voltage Tolerance
%V
(AC)
± 5
1. Factory set to 400V – 380 or 415V selectable by commissioning engineer.
2. Factory set to 50Hz; 60 Hz selectable by commissioning engineer. Frequency converter operation also selectable.
3. EN 50091-3 (1.4.50).
4. Crest factor > 3:1 limited by IEC 62040-3 definition of non linear load.
5. EN 50091-3 (4.3.4).
6. EN 50091-3 (4.3.7) also for 0-100-0% load transient. Transient recovery time: return to within 5% of steady state output voltage within
half a cycle.