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CLINK II SCU MANAGER
electric circuit diagrams scu
version 5.0
83
Note
•
The main circuit contains fuse F1, isolator Q1 and contactors K1, K2 and K3. To be able to determine the
status (OFF, LOW, HIGH) of the main circuit, the status of K1 and K2 is read in by the Starter Control Unit
through the digital inputs DI_1 and DI_2 (see figure 32 and figure 33). The status of the isolator is read in
through digital input DI_0. Digital inputs are used for manual control (S10, S11 and S12). The auxiliary
relays K10, K11 and K12 are activated with the digital outputs DO_0, DO_1 and DO_2.
•
Direct switch off via auxiliary circuit is possible with S1.
9.2
Mains configurations SCU
9.2.1
Single phase supply (L-N) I < 64A
Figure 34: Single phase supply (L-N)
Note
•
Current measurement must be connected to the analog input I1 to enable correct Power Factor measure-
ment. Select the phase that has to be measured by using the setpoint Voltage Measurement Mode (see
5.2.1 on page 15).
•
The contactor must be connected between the same phase and neutral as used for voltage measurement
by the SCU to enable Automatic Restart Function.
•
Both MIU 21-16 and MIU 21-64 can be applied. For information regarding the MIU see the System Over-
view manual. Connection points are the same.
Lx
N
SCU
AGND
I1
I
∆
N
U
I2
I3
CT1
CT2
s1-1000
s1-250
s1-1000
s1-250
s2
p1
p2
p1
p2
VT1
s1
s2
p1
p2
R2
R1
1
2
3
4
5
6
8
10
9
s2
s2
7
12
11
MIU 21-16