1 DC1 device series
1.7 Selection criteria
24 DC1 frequency inverter 10/12 MN04020003Z-EN www.eaton.com
1.7 Selection criteria
Select the frequency inverter according to the supply voltage U
LN
of the sup-
ply system and the rated operational current of the assigned motor. The cir-
cuit type ( / ) of the motor must be selected according to the rated opera-
tional current.
The rated output current I
e
of the frequency inverter must be greater than or
equal to the rated motor current.
Figure 7: Selection criteria
When selecting the drive, the following criteria must be known:
• Type of motor (three-phase asynchronous motor)
• Mains voltage = rated operating voltage of the motor (e. g. 3~ 400 V),
• Rated motor current (recommended value, dependent on the circuit type
and the power supply)
• Load torque (quadratic, constant),
• Starting torque,
• Ambient air temperature (rated value e. g. +40 °C).
￫
When connecting multiple motors in parallel to the output of a
frequency inverter, the motor currents are
added
geometrically
–
separated by effective and idle current components.
When you select a frequency inverter, make sure that it can
supply the total resulting current. If necessary, for dampening
and compensating the deviating current values, motor reactors
or sinusoidal filters must be installed between the frequency
inverter and the motor.
1410 min
230/400 V 3.2/1.9 A
50 Hz
-1
0.75 kW
cos ϕ 0.79
P-07
P-08
P-10
P-09
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