Connection In The Case Of Unidentified Cable Marking/ Connection - Grundfos SP 1A Montage- Und Betriebsanleitung

6.6.2 Motors wound for star-delta starting
The connection of Grundfos submersible motors wound for star-
delta starting appears from the table below and fig. Grundfos
motors wound for star-delta starting.
Connection
PE
U1
V1
W1
W2
U2
V2
Check the direction of rotation as described in section Connection
of three-phase motors.
PE L1
W2
PE U1
Grundfos motors wound for star-delta starting
If direct-on-line starting is required, the motors must be connected
as shown in fig. Grundfos motors wound for star-delta starting -
direct-on-line starting.
PE
L1
W2
PE U1
Grundfos motors wound for star-delta starting - direct-on-line
starting
Related information
6.6 Connection of three-phase motors
Grundfos 6" motors
Yellow and green
Brown
Black
Grey
Brown
Black
Grey
L2 L3
U2
V2
V1 W1
M
3
L2
L3
U2
V2
V1 W1
M
3
6.6.3 MS6000P Synchronous motors requiring double cabling
PE L1
U2
PE U1 V1
Grundfos MS6000P 37 kW and 45 kW
6.6.4 Connection in the case of unidentified cable marking/
connection
If it is unknown where the individual conductors are to be connected
to the mains in order to ensure the correct direction of rotation,
proceed as follows:
Motors wound for direct-on-line starting
Connect the pump to the mains as is expected to be right.
Then check the direction of rotation as described in section
Connection of three-phase motors.
Motors wound for star-delta starting
Determine the windings of the motor by means of an ohmmeter and
name the conductor sets for the individual windings accordingly:
U1-U2, V1-V2, W1-W2. See fig. Unidentified cable marking/
connection - motors wound for star-delta starting.
U1 U2
V1 V2
Unidentified cable marking/connection - motors wound for star-
delta starting
If star-delta starting is required, connect the conductors as shown in
fig. Grundfos motors wound for star-delta starting.
If direct-on-line starting is required, connect the conductors as
shown in fig. Grundfos motors wound for star-delta starting - direct-
on-line starting.
Then check the direction of rotation as described in section
Connection of three-phase motors.
Related information
6.6 Connection of three-phase motors
6.6.2 Motors wound for star-delta starting
L2 L3
V2 W2
W1
M
~
3
W1 W2
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