1 DC1 device series
1.7 Selection Criteria
28
DC1…20… and DC1…OE1 Variable Frequency Drives
02/20 MN040059EN
www.eaton.com
1.7 Selection Criteria
Select the variable frequency drive according to the supply voltage U
LN
of
the supply system and the rated operational current of the assigned motor.
The circuit type (
Δ
/
) of the motor must be selected according to the
supply voltage.
The variable frequency drive’s rated output current I
e
must be greater than or
equal to the rated motor current.
Figure 12:Selection criteria
When selecting the drive, the following criteria must be known:
•
Mains voltage = rated operating voltage of the motor (e. g. 3~ 400 V),
•
Type of motor (e.g., three-phase asynchronous motor)
•
Rated motor current (recommended value, dependent on the circuit type
and the power supply)
•
Ambient conditions: ambient temperature, control cabinet installation
with IP20 degree of protection or direct local installation with IP66
degree of protection.
Example based on figure 12
•
Mains voltage: 3~ 400 V, 50 Hz
•
Star-connected circuit (400 V)
•
Rated operational current: 1.9 A (400 V)
•
Control panel installation
→
IP20 degree of protection
•
Ambient air temperature: max. 50 °C without output reduction, IP20
￫
Variable frequency drive that should be selected: DC1-342D2FN-A20CE1
•
DC1-
34
…: 3-phase main terminal, rated operating voltage: 400 V
•
DC1-…
2D2
…: 2.2 A – The variable frequency drive’s rated operational
current (output current) guarantees that the motor will be supplied with
the required rated operational current (1.9 A).
1410 mi n
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
L1/L L2/N L3
U
V
W
1
2
3
4
5 6 7 8 9 10 11
