TECHNICAL DATA
UPS Models MST 30 MST 40
INPUT STAGE
Nominal voltage 380-400-415 Vac 3-phase with neutral (4 wire)
Nominal frequency 50-60Hz
Accepted input voltage tolerance due to no
intervention of the battery (referred to
400Vac)
± 20% @ 100% load
-40% +20% @50% load
Accepted input frequency tolerance due to no
intervention of the battery (referred to
50/60Hz)
± 20%
40-72Hz
Technology
High frequency IGBT or CoolMos with an independent digital PFC average current mode
control on each phase
Input current harmonic distortion
THDi ≤ 3 %
(1)
Input power factor
≥ 0.99
Power Walk In mode Programmable from 5 to 30 sec. in 1 second steps
OUTPUT STAGE
Nominal voltage
(2)
380/400/415 Vac 3-phase with neutral (4wire)
Nominal frequency
(3)
50/60Hz
Nominal apparent output power 30kVA 40kVA
Nominal active output power 27kW 36kW
Output power factor 0,9
Short circuit current
1,5 x In for t ≥ 500ms
Precision of output voltage (referred to a
400Vac output voltage)
± 1%
Static stability
(4)
± 0.5%
Dynamic stability
± 3% resistive load
Voltage harmonic distortion with linear and
normalised distorting load
≤ 1% with linear load
≤ 3% with distorting load
Crest factor allowed with nominal load 3:1
Frequency precision in free running mode 0,01%
Inverter overloads @ PFout = 0,8
(Resistive load)
115% Infinite
125% 10 min.
133% 1 min
150% 1 min.
168% 5 sec.
> 168% 0,5 sec.
Inverter overloads @ PFout = 0,9
(Resistive load)
110% 10 min.
125% 1 min
133% 1 min.
150% 5 sec.
> 150% 0,5 sec.
Bypass overload
110% Infinite
125% 60 min
133% 60 minutes
150% 10 minutes
>150% 2 seconds
Technology
High efficiency inverter with digital multiprocessor (DSP+µP) voltage/current control, based
on signal processing techniques with feedforward
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