CLINK II SCU MANAGER
electric circuit diagrams scu
version 5.0
77
9.1.2
Star-Delta starter
Figure 27: Single line diagram Star Delta starter
Note
In figure 27 auxiliary current transformers are applied for current measurement. This is necessary for
measurement of nominal currents > 64 A. Nominal currents up to 64 A run directly through the MIU.
T1
X1
T2, T3
K2
X2: U1-V1-W1
L1-N
MIU
F1
F2
SCU
auxiliary circuit
K1
T1:
core balance transformer
T2, T3:
current transformers
F1:
fuse main circuit
F2:
fuse auxiliary circuit
MIU:
Measurement Interface Unit
SCU:
Starter Control Unit
K1:
Star or Low Contactor
K2:
Delta or High Contactor
K3:
Main Contactor
K10:
off contact SCU
K11:
on1 contact SCU
K12:
on2 contact SCU
X1:
incoming busbar
X2:
outgoing cabling motor
LPS:
Local Power Supply
L1, L2, L3, N
K11
K10
K12
K3
X2: U2-V2-W2
K1
K2
K3
LPS