Values are based on a typical motor efficiency (IE2/IE3 border line). Motors with lower efficiency add to the power loss in the frequency
converter and motors with high efficiency reduce power loss.
Applies to dimensioning of frequency converter cooling. If the switching frequency is higher than the default setting, the power losses
may rise. LCP and typical control card power consumptions are included. Further options and customer load may add up to 30 W to the
losses (though typically only 4 W extra for a fully loaded control card or fieldbus).
For power loss data according to EN 50598-2, refer to www.danfoss.com/vltenergyefficiency.
2) Measured using 50 m (164 ft) (shielded motor cables at rated load and rated frequency. For energy efficiency class, see
chapter 9.4 Ambient Conditions. For part load losses, see www.danfoss.com/vltenergyefficiency.
9.2 Mains Supply (3-phase)
Mains supply (L1, L2, L3)
Supply terminals
L1, L2, L3
Supply voltage
380–480 V: -15% (-25%)
1)
to +10%
1) The frequency converter can run at -25% input voltage with reduced performance. The maximum output power of the
frequency converter is 75% if input voltage is -25% and 85% if input voltage is -15%.
Full torque cannot be expected at mains voltage lower than 10% below the lowest rated supply voltage of the frequency
converter.
Supply frequency
50/60 Hz
±
5%
Maximum imbalance temporary between mains phases
3.0% of rated supply voltage
True power factor (
λ
)
≥
0.9 nominal at rated load
Displacement power factor (cos
ϕ
)
near unity (
>
0.98)
Switching on input supply L1, L2, L3 (power-ups)
≤
7.5 kW
Maximum 2 times/minute
Switching on input supply L1, L2, L3 (power-ups) 11–22 kW
Maximum 1 time/minute
The unit is suitable for use on a circuit capable of delivering less than 5000 RMS symmetrical Amperes, 480 V maximum.
9.3 Motor Output and Motor Data
Motor output (U, V, W)
Output voltage
0–100% of supply voltage
Output frequency
0–500 Hz
Output frequency in VVC
+
Mode
0–200 Hz
Switching on output
Unlimited
Ramp time
0.05–3600 s
Torque characteristics
Starting torque (constant torque)
Maximum 160% for 60 s
1)
Overload torque (constant torque)
Maximum 160% for 60 s
1)
Starting torque (variable torque)
Maximum 110% for 60 s
1)
Overload torque (variable torque)
Maximum 110% for 60 s
Starting current
Maximum 200% for 1 s
Torque rise time in VVC
+
(independent of f
sw
)
Maximum 50 ms
1) Percentage relates to the nominal torque.
9.4 Ambient Conditions
Ambient Conditions
IP class
IP20
Vibration test, all enclosure sizes
1.0 g
Relative humidity
5–95% (IEC 721-3-3; Class 3K3 (non-condensing) during operation
Ambient temperature (at DPWM switching mode)
- with derating
Maximum 55
°
C (131
°
F)
1)
- at full constant output current with some power size
Maximum 50
°
C (122
°
F)
- at full constant output current
Maximum 45
°
C (113
°
F)
Specifications
VLT
®
Midi Drive FC 280
48
Danfoss A/S © 11/2015 All rights reserved.
MG07A102
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