2 Engineering
2.9 Three-phase motor
64
DA1 Variable Frequency Drives
08/18 MN04020005Z-EN
www.eaton.com
2.9.2 Circuit types withthree-phase motors
Based on the mains voltage (
LN
= output voltage U
2
) and the rated data on
the motor’s nameplate (rating plate), the stator winding of a three-phase
motor can be configured as a star or delta circuit.
Figure 36: Example of a motor
rating plate
Figure 37: Configuration types:Star-connected circuit (left), Delta circuit (right)
Examples based on figures36and 37
Motor with star circuit configuration:
Mains voltage: 3~ 400 V; Output voltage: 3~ 400 V
→
DA1-342D2…
Motor with delta circuit configuration:
Mains voltage: 1~ 230 V; Output voltage: 3~ 230 V
→
DA1-124D3…
Motor connection
DA1 variable
frequency
drives
as per
IEC
as per
UL
U
U1 (-U2)
T1 (-T4)
V
V1 (-V2)
T2 (-T5)
W
W1 (-W2)
T3 (-T6)
1410 mi n
230/400 V
3.2/1.9 A
50 Hz
-1
0,75 KW
cos ϕ 0.79
U1
V1
W1
W2
U2
V2
U1
V1
W1
W2
U2
V2