Eaton DS7 Manual page 147

L01/L+
S1
S2 K1
K1
Q21
EN
K1
A2
L00/L-
①
Figure 112: Actuation, motor cascade, part 1
a Enable
b Soft starter/Soft stop
c Starting frequency monitoring.
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.
L01/L+
S3
Q1 Q11
K12
K3
Q11 Q12
L00/L-
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.
K4
K1T
Q11 Q21
K1 K4 K12
Q1 K2
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.
Q12 Q12 K12
K22
Q11
K4T
K12 Q21
a
DS7 Soft starter 09/16 MN03901001Z-EN www.eaton.com
Q31 Qn1
K22 K32 Kn2
S3
Q21 Q22 Q22
K3
Q21
Q22 K22
b
7 Connection examples
7.3 Size 3 and 4 (41 – 200 A)
Q21
13
TOR RUN
K2
14
Q21
A1
K3 K4
A2
②
S3
K(n-1)2 Qn1
Kn2 K3
Q(n-1)1
K4T
Qn1
Qn1 Qn2
23
K4 K4
24
K1T K4T
③ ④
Qn2 Qn2
Kn2
c
143