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CLINK II SCU MANAGER
electric circuit diagrams scu
version 5.0
75
9
ELECTRIC CIRCUIT DIAGRAMS SCU
9.1
Single line and auxiliary circuit diagrams
9.1.1
Direct On Line starter
Figure 25: Single line diagram Direct On Line starter
Note
In figure 25 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
K1
X2: U-V-W
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: Main
Contactor
K10:
off contact SCU
K11:
on contact SCU
X1: incoming
busbar
X2:
outgoing cabling motor
LPS:
Local Power Supply
L1, L2, L3, N
K11
K10
LPS