72
6
DETAILED PARAMETER DESCRIPTION
Standard connection with three cables:
P28=OFF, Soft-
Starter line current equal to motor current.
Connection within the Motor Delta Connection with six
cables:
P28=ON, Soft-Starter line current approximately 58%
of the motor current.
For the delta inside connection the Soft-Starter SSW-03 is installed
separately in each winding of the motor through 6 cables. In
this type of connection the circulating current of the Soft-Starter
is only the 58% from the nominal current of the motor. This char-
acteristic changes the relation between the motor nominal cur-
rent and the nominal current of the Soft-Starter. To know, in this
connection, the Soft-Starter can be specified as:
- 1.50 times the nominal current of the motor, during the start;
- 1.73 times the nominal current of the motor, in full voltage.
During the start the relation is lesser because had the common
characteristics to this type of connection (inside of the Delta) the
ThyristoroftheSoft-Starterneedstoleadthesamecurrentinalesser
cycletime,raisingwiththisthelossesintheThyristorduringthestart.
The standard connection requires less output wiring. The con-
nection within the motor delta connection requires twice the
standard connection, but for short distances, it is a cheaper
option for Soft-S motor + wiring.
S
T
U
V
W
R
S
T
N
PE
R
R
S
T
N
PE
R
S
T
U
V
W
2/V1
5/V2
2/V1
5/V2
6/W2
3/W1
1/U1
4/U2
6/W2
3/W1
R
S
T
N
PE
R
S
U
S
V
R
W
T
T
1/U1
4/U2
2/V1
5/V2
6/W2
3/W1
1/U1
4/U2
