
33
5.7.2
Lead designations
Direct starting in star
U1
T1
T3
T2
U2
W2
V2
W1
V1
0578-0001
L1
L2
L3
Join
North America
T1 (U1)*
T2 (V1)*
T3 (W1)*
-
Sulzer factory
standard
U1
V1
W1
U2, V2, W2
Direct starting in delta
T1
U1
T3
T2
U2
W2
V2
W1
V1
0579-0001
L1
L2
L3
-
North America
T1 (U1)*
T2 (V1)*
T3 (W1)*
-
Sulzer factory
standard
U1; W2
V1; U2
W1; V2
-
* Alternative lead designations
The thermal monitoring circuit (F1) must be wired into the motor contactors in such a manner that a
manual reset is required.
ATTENTION
The temperature limiting switches may only be operated as specified by the
manufacturer (see following table).
Operating voltage
...AC
100 V to 500 V ~
Rated voltage
AC
250 V
Rated current
AC cos
φ
= 1.0
2.5 A
Rated current
AC cos
φ
= 0.6
1.6 A
Max. switching current at
I
N
5.0 A
5.7.3
Soft starter (option)
For units > 15 kW we recommend the use of a soft starter.
ATTENTION
The units must be connected DOL when used with soft starters.
M3 ~
PE
F1
DI
W2
V2
W1
V1
U2
U1
F0
W1
U1
V1
1
2
3
0580-0019
Legend
1 soft starter
2 terminal box
3 to control panel
Figure 27. Wiring diagram with soft starter (option)