Installation manual

Chapter 6 Specifications 39
Liebert APM Modular UPS User & Installation Manual
6.6 Electrical Characteristics (Inverter Output)
Table 6-6 Inverter output (to critical load)
Rated power (kVA) Unit 30 ~ 150
Rated AC voltage
1
Vac 380/400/415 (three-phase four-wire, with neutral reference to the bypass neutral)
Frequency
2
Hz 50/60
Overload %
110% for 60min
125% for 10min
150% for 1min
>150% for 200ms
Fault current % 340% current limitation for 200ms
Non-linear load
capability
3
% 100%
Neutral current capability % 170%
Steady state voltage
stability
% ±1 (balanced load), ±2 (100% unbalanced load)
Transient voltage
response
4
% ±5
Tatal harmonic voltage % <1 (linear load), <4 (non-linear load
3
)
Synchronisation window Rated frequency ±2Hz (selectable from ±0.5Hz to ±3Hz)
Slew rate (max change
rateof synchronisation
frequency)
Hz/s 1; selectable from 0.1 to 3
Inverter voltage tolerance %V(ac) ±5
Note:
1. Factory set to 400V. 380 or 415V selectable by commissioning engineer.
2. Factory set to 50Hz. 60 Hz selectable by commissioning engineer.
3. EN 50091-3 (1.4.58) crest factor 3:1.
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