17
Installation and maintenance
LSRPM - PLSRPM
Synchronous permanent magnet motors
LEROY-SOMER
4155 en - 2012.05 / e
2.5.7 - Direction of rotation
Warning: motor with backstop: starting in the wrong direction
destroys the backstop (see arrow on motor housing).
If the motor is fitted with accessories (thermal protection or
space heater), these must be connected on screw terminals or
terminal blocks with labelled wires (see section 2.4).
2.5.8 - Earth terminal
This is located inside the terminal box. In some cases, the earth
terminal may be located on one of the feet or one of the cooling
fins (round motors). It is indicated by the symbol:
* If required, ask the supplier for this diagram, specifying the
motor type and number (shown on the motor nameplate).
2.5.9 - Connecting the power supply cables to
the terminal block
The cables must be fitted with connectors suitable for the cable
cross-section and the terminal diameter.
They must be crimped in accordance with the connector
supplier’s instructions.
They must be connected with connector resting on connector
(see diagrams below):
Tightening torque (N.m) on the terminal block nuts
Terminal M4
M5
M6
M8
M10 M12 M14 M16
Steel
2
3.2
5
10
20
35
50
65
Brass
1
2
3
6
12
20
-
50
If using cables without connectors, attach yoke joint.
If any nuts on the brass terminal block are lost, they must be
replaced by brass nuts, not steel ones.
When closing the box, ensure that the seal is correctly positioned.
Sensor
It is compulsory to earth the motor. Earthing must
be performed in accordance with current regula-
tions (protection of workers).
As a general rule, check that no nut, washer or
other foreign body has fallen into or come into
contact with the winding.
Warning, to reverse the direction of rotation, refer
to the manual for the corresponding drive.
