Eaton DS7 - Page 147

7 Connection examples
7.3 Size 3 and 4 (41 – 200 A)
DS7 Soft starter 09/16 MN03901001Z-EN www.eaton.com 143
Figure 112: Actuation, motor cascade, part 1
a Enable
b Soft starter/Soft stop
c Starting frequency monitoring.
Set the timing relay so that the soft starter is not thermally overloaded.
The appropriate time relates to the admissible operating frequency of the selected soft starter.
Otherwise select the soft starter so that the required times are achievable.
d Set the timing relay to 2 s off-delay. This ensures that the next motor branch is not connected when a soft starter is running.
N/C contact S1 switches all motors off at the same time.
Figure 113: Actuation, motor cascade, part 2
a Motor 1
b Motor 2
c Motor n
The N/C contact S3 is required if motors also have to be switched off individually.
①②③④
A1
A2
K2
23
24
K4
RUN
K1T K4T
K4
13
14
K3
TOR
EN
A2
Q21
K1
S2 K1
K1
S1
Q11 Q21
K2
K1T
K4
K1 K4
Q1
K12 K22
Q31
K32
Qn1
Kn2
K4
Q21
Q21
L00/L-
L01/L+
Q11
Q12
Q12
K12
Q12
K3
Q1
Q11
ab
K12
Q21
Q22
Q22
K22
Q22
K3
K12
Q21
Q11
Q21
K22
K4T
c
Qn1
Qn2
Qn2
Kn2
Qn2
K3
K(n-1)2
Qn1
Q(n-1)1
Kn2
Qn1
K4T
S3
S3
S3
L00/L-
L01/L+