Liebert NX 30 - Electrical Characteristics (Inverter Output)

User Manual 10H52192UM60 - Rev. 1 - 09/2011 59
Product Specifications Liebert NX
8.6 Electrical Characteristics (Inverter Output)
Table 8-6 Inverter Output (to Critical Load)
Item Unit
Rated power (kVA)
30 40 60
Rated AC voltage
1
Vac 380/400/415 (three-phase five-wire, with neutral reference to the bypass neutral)
Frequency
2
Hz 50/60
Overload
long time %
100 – 105
60 min %
105 – 110
10 min %
110 – 125
1 min %
125 – 150
< 200 ms % > 150
Fault current
(current limitation for max. 200 ms)
% 310 465 310
Non-linear load capability
3
% 100
Neutral current capability % 170
Steady state voltage stability %
± 1
Transient voltage response
4
%
± 5
Total harmonic voltage % <1 (linear load), <4 (non-linear load
3
)
Synchronization window Hz Rated frequency
±5
Slew rate (max change rate of
synchronization frequency)
Hz/s 1; setting range: 0.1 to 3 (single unit), 0.2 (parallel system)
Note:
1. Factory default set to 400 V. 380 V or 415 V selectable by commissioning engineer.
2. Factory default set to 50 Hz. 60 Hz selectable by commissioning engineer. Note that the system frequency can be changed only when
the UPS is on bypass. It is strictly prohibited to change the system frequency when the UPS is on inverter.
3. IEC 62040-3, annex E (crest factor 3:1).
4. IEC 62040-3 also for 0% - 100% - 0% load transient. Transient recovery time: return to within 5% of steady state output voltage within
half a cycle.
8.7 Electrical Characteristics (Bypass Input)
Table 8-7 Bypass Input
Item Unit
Rated power (kVA)
30 to 60
Rated AC voltage
1
Vac
380/400/415, three-phase five-wire, sharing neutral with the rectifier input and
providing neutral reference to the output
Rated
current
380V
400V
415V
A 225
A 215
A 205
Upstream protection, bypass
line
N/A
Thermomagnetic circuit breaker, rated up to 125% of nominal output current.
IEC 60947-2 curve C.
Current rating of neutral cable A 1.7
×
In
Frequency
2
Hz 50/60
Transfer time (between
bypass and inverter)
ms
Synchronous transfer:
≤
1
Asynchronous transfer (default): 15 (50Hz), 13.3 (60Hz); or 40, 60, 80, 100 selectable
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: ±10
Synchronization window Hz Rated frequency
±5
Note:
1. Factory default set to 400 V. 380 V or 415 V selectable by commissioning engineer.
2. Factory default set to 50 Hz. 60 Hz selectable by commissioning engineer.