Liebert NXC 40kVA - Electrical Characteristics (Bypass Input); Efficiency and Loss

Chapter 11 Specifications 83
Liebert NXC 30kVA And 40kVA UPS User Manual
Item Unit
Rated power (kVA)
30kVA
40kVA
Overload %
For linear load requirement:
< 105%, continues;
105 ~ 125% of rated load, 5min;
125 ~ 150% of rated load, 1min;
> 150%, 200ms
Non-linear load
capability
3
% 100%
Steady state voltage
stability
%
±1% for balanced three phase load;
±2% for unbalanced load
±1% for balanced three phase load;
±2% for unbalanced load
Transient voltage
response
4
% ±5% for 100% rated linear load step
Total harmonic voltage %
2% (0 ~ 100% linear load);
5% (0 ~ 100% non-linear load)
2% (0 ~ 100% linear load);
5% (0 ~ 100% non-linear load)
Synchronisation window
Hz
Rated frequency ±0.5, ±1, ±2, ±3 (optional)
Slew rate (max. change
rate of synchronisation
frequency)
Hz/s Setting range: 0.1 ~ 0.6 (UPS module), 0.6 (parallel system)
Note:
1. Factory set to 380V. 400V or 415V selectable by service engineer.
2. Factory set to 50Hz. 60Hz selectable by service 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. EN 50091-3 (1.4.58) crest factor 3:1, non-linear load.
4. IEC 62040-3/EN 50091-3 also for 0% ~ 100% ~ 0% load transient. Transient recovery time: return to within 5% of steady state
output voltage within half a cycle
11.7 Electrical Characteristics (Bypass Input)
Table 11-7 Bypass input
Item Unit
Rated power (kVA)
30kVA
40kVA
Rated AC voltage
1
Vac
380/400/415, 3-phase 4-wire, sharing neutral with the rectifier input and providing neutral
reference to the output
Rated
current
380V
400V
415V
A
46
60
A
43
58
A
41
56
Overload %
Based on nominal voltage and rated load current under apparent power:
< 105%, continues;
105 ~ 125% of rated load, 5min;
125 ~ 150% of rated load, 1min;
150 ~ 400% of rated load, 1s;
> 400%, 200ms
Frequency
2
Hz
50/60
Bypass voltage tolerance %Vac
Upper limit: +10%, +15% or +20%, default: +15%;
Lower limit: -10%, -20%, -30% or -40%, default: -20%
Bypass frequency
tolerance
% ±10% or ±20%, default: ±20%
Synchronisation window
Hz
Rated frequency ±0.5, ±1, ±2, ±3 (optional)
Note:
1. Factory set to 380V. 400V or 415V selectable by service engineer.
2. Factory set to 50Hz. 60Hz selectable by service engineer
11.8 Efficiency And Loss
Table 11-8 Efficiency and loss
Item
Unit
Rated power (kVA)