Chapter 11 Specifications 73
Liebert APM 90 Integrated Modular UPS User Manual
11.6
Electrical Characteristics (Inverter Output)
Table 11-6
Inverter output (to critical load)
Item
Unit
Parameter description
Rated AC voltage
1
Vac
380/400/415 (3-phase 4-wire, with neutral reference to the bypass
neutral)
Frequency
2
Hz
50/60
Overload %
For linear load requirement:
<105%, continues;
105%
~
110%, 60min;
110
~
125% of rated load, 10min;
125
~
150% of rated load, 1min;
>150%, 200ms
Non-linear load capability
3
%
100%
Steady state voltage stability
%
±
1% for balanced three phase load;
±
5% for unbalanced load
Transient voltage response
4
%
±
5% for 100% rated linear load step
Total harmonic voltage
distortion
%
2% (0
~
100% linear load);
4% (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: 0.6
1. Factory set to 380V. 400V or 415V can be selected by commissioning engineer through software.
2. Factory set to 50Hz. 60Hz can be selected by commissioning engineer through software. 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 Mains Input)
Table 11-7
Bypass mains input
Rated power (kVA/kW)
18/18
36/36
54/54
72/72
90/90
Item
Unit
20/18
40/36
60/54
80/72
100/90
Rated AC voltage
1
Vac
380/400/415, 3-phase 4-wire, sharing neutral with the rectifier input
27.3 54.5 82 109 136
Rated
current
380V A
30.3 60.6 91 121 152
Overload %
Based on nominal voltage and rated load current under apparent power:
<110%, continues;
<150% of rated load, 1min;
1000% of rated load, 100ms
Frequency
2
Hz
50/60
Bypass voltage tolerance
%Vac
Upper limit: +10%, +15% or +20%, default: +15%;
Lower limit: -10%, -15%, -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)
