NFO
Drives
AB
2021
201013
‐
2
Operating
and
Installation
Manual
5
2 Technical
data
Table 1. Inverter ratings for 380-480V 3~ 50/60 Hz Type TN electrical supply network
Art. no.
Rated
output
power
Rated
output
current
[1]
Max
output
current
[2]
Apparent
output
power
[3]
Absolute
losses
[4]
P
L,CDM(90,100)
Efficiency
class
[5],[6]
Standby
power
[7]
Size (H×D×W)
[mm]
Weight
[kg]
NFO
3A4D3490D
2.2 kW
1.0-4.9 A
5.8 A
3.3 kVA
0.14 kW
IE2
7.5 W
390x190x160
7.0
Notes:
[1] The inverter is optimized for use at a wide range of nominal motor currents in the power ranges of 0.37 kW to
2.2 kW.
[2]
The inverter application should not be dimensioned for higher continuous current than Rated output current.
However, it can supply Max output current for an infinite time, but it may be detrimental to its life span.
[3]
Apparent output power S
r,equ
used for IE (International Efficiency) classification.
[4]
Measured at a load point corresponding to 90% of rated frequency and 100% of rated output current.
[5]
CDM (Complete Drive Module) efficiency class according to Commission Regulation (EU) 2019/1781 and
IEC 61800-9-2:2017.
[6]
Due to sinusoidal voltage output from the NFO inverter, the expected additional harmonic losses in the motor,
which are present when using a PWM inverter, are now absent.
IEC 61800-9-2:2017: “When [three-phase induction motors] are operated on a CDM, additional harmonic
losses P
LHL
= r
LHL
× P
LTsin
are caused by the non-sinusoidal voltage supply”. The increase of motor losses as a
result of PWM operation (r
LHL
) are estimated to 15% of the total losses. According to the reference model for a
2.2kW IE2 or IE3 induction motor, this corresponds to about 0,05 kW.
When determining the overall efficiency of the PDS (Power Drive System, i.e. inverter and motor together), it
should be taken into account that motor losses are approximately 15% lower when using an inverter with
sinusoidal voltage output, than it would be if using a conventional PWM inverter.
[7]
No external control equipment connected to the 24V supply output, and cooling fan regulator at low speed.
3006469-2022-04
