Connection Of Three-Phase Motors - Grundfos SP Installation And Operating Instructions Manual

6.5.3 3-wire motors
MS402 3-wire single-phase motors incorporate motor protection
and must be connected to the mains via a Grundfos control box SA-
SPM 50 Hz or 60 Hz without motor protection.
MS4000, MS6000 3-wire single-phase motors must be connected
to the mains via a Grundfos SA-SPM 50 Hz or 60 Hz control box
incorporating motor protection.
When a conventional motor-protective circuit breaker is used, the
electrical connection must be carried out as described below.
N
1 2
M
1
CSIR
N L
1 2 3
M
1
CSCR
L
C
3 4
Cs Cr
4

6.6 Connection of three-phase motors

Three-phase motors must be protected. See section
motors.
For electrical connection via the MP 204, see the separate
installation and operating instructions for this unit.
When a conventional motor-protective circuit breaker is being used,
the electrical connection must be carried out as described below.
Related information
6.1.2 Three-phase motors
6.6.1 Motors wound for direct-on-line starting
The connection of Grundfos submersible motors wound for direct-
on-line starting appears from the table below and fig.
motors - direct-on-line starting.
Mains
Grundfos 4" and 6" motors
PE PE (yellow and green)
L1
L2
L3
Check the direction of rotation as described in section
of three-phase motors.
PE
L1
PE
U
3
Grundfos motors - direct-on-line starting
Related information
6.6 Connection of three-phase motors
Three-phase
Grundfos
Cable/connection
U (brown)
V (black)
W (grey)
Connection
L3
L2
V M
M
15