Installation and commissioning
DIGIDRIVE
Variable speed drive
Réf. 3218 GB - 4.33 / d - 02.02
LEROY-SOMER
31
3.5.7.3 - Drive-motor wiring
Use a shielded cable between the drive and
the motor.
• Cable characteristics
Use a 3-phase + earth shielded or
armoured cable with low stray capacity
between the cables and the shielding or
sheathing.
• Connecting the shielding
- Connect the shielding at both ends: to the
earth terminal on both the motor and the
drive (or to the fieldbus at the filter output).
- Strip back the cable covering and fix the
shielding securely to the cabinet grille or
base plate using a metal jumper.
- If possible, connect the shielding to the
cabinet ground at the cable exit point, using
brass cable glands for example, and
stripping back the cable covering.
• Tip to ensure shielding continuity
- When the motor is connected via the
intermediate terminal block in the cabinet,
connect the shielding using a terminal
which is not isolated from the grille or base
plate. If the terminal block is located more
than 300 mm from the edge of the grille, fix
the shielding securely using a metal
jumper.
- When a switching device is used close to
the motor, use a grounding strip (maximum
length 100 mm) to provide continuity.
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