Wolf KG Standard Installation And Maintenance Instructions Manual page 13

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Electrical connection
Single speed control
Motors up to 2.2 kW are usually started directly; from
3 kW they are started in star delta configuration.
Configuration of phase windings
L1
W2
U1
W1 U2
W1
L3
L2
V2 V1
L3
Configuration on
terminal board
W2 U2 V2 W2
U1 V1 W1 U1
L1 L2 L3 L1
∆ configuration Y configuration
Dual speed control
(2 separate windings)
Version for e.g. 1000/1500 rpm or 750/1000 rpm
L1
1U1
1V1
1W1
L3 L2
Low speed
L1 L2 L3 N
1U1 1V1 1W1
2U1 2V1 2W1
Contactor control
Dual speed control in a ratio of 1:2
(tapped winding configuration)
Version for e.g. 1500/3000 rpm or 750/1500 rpm
L1
1U
2W
2U 2V
1W 1V
L3
L2
Low speed
Use a winding configuration for an output gradation that is suitable for
a torque pattern for fan drive.
L1 L2 L3 N
2U 2V 2W
1U 1V 1W
Contactor control
L1
U1
The ends of the
3 phase windings go
U2
to the Y/∆ switch
W2 V2
V1
L2
U2 V2 W2 U2 V2
U1 V1 W1
V1 W1
Y/∆ switch
L2 L3
L1 L2 L3
L1
2U1
2V1
2W1
L3 L2
High speed
1U1 2U1 1V1 2V1 1W1 2W1
0 1 2
L1
L2 L3
Pole changing switch
L1
2U
1W
1U
1V
2V
2W
L3
L2
High speed
1U 2U 1V 2V 1W 2W
0 1 2
L1
L2 L3
Pole changing switch
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