12.6 Electrical Characteristics (Inverter Output)
Item Unit
Rated p ower (k V A )
25 0
Rated AC voltage
1
Vac 380/400/415 (3-phase 4-wire, with neutral reference to the bypass neutral)
Frequency
2
Hz 50/60
Power factor 1
Overload % <105, long time; <110%, 1hr; <125, ≤10 min; <150, ≤1 min; >150, ≤200 ms
Max. short circuit current of inverter
4
A Up to 240% for 200 ms
Non-linear load capability kVA 100
Steady state voltage stability % ±1
Transient voltage response % ±5
Total voltage harmonic distortion % < 2 (linear load), < 4 (non-linear load
3
)
Synchronization window Hz
Upper limit: 0.5 Hz, 1 Hz, 2 Hz, 3 Hz, +10%; Default: +10%.
Lower limit: -0.5 Hz, -1 Hz, -2 Hz, -3 Hz, -10%; Default: -10%
Slew rate (max. change rate of synchronization
frequency)
Hz/s 0.6; setting range: 0.1 to 3
Transfer time ms
Frequency converter mode: transfer without interruption 0ms; transfer with
interruption < =5ms;
ECO mode: 4ms; Dynamic online mode: 0ms
Table 12.6 Inverter output (to critical load)
1. Factory set to 380 V, 400 V or 415 V can be selected by service engineer at site.
2. Factory set to 50 Hz or 60 Hz can be selected by service engineer at site. 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. Applicable for 3 phase and single phase current fault.
12 Specifications
175
Vertiv™ Liebert® APM Plus User Manual
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