Emc: Good Wiring Practice - Motor Side - IMO iDrive Instruction Manual

3.3.4 EMC: Good wiring practice – motor side
415V 50Hz
3-phase + N
Power supply
Enclosure back plate
(paint/coating free)
Optional ferrite
choke, only required
if motor cable is
very long.
Note: For very long
cables an ACR
should be used
Armoured or
screened cable,
3C or 4C.
Screen
connected at all
ends as shown.
Note: Power supply side ancillary equipment
not shown in this diagram, for clarity.
Chapter 3 Environment description and installation
L1(L) L2 L3(N)
400V iDrive
(for example)
P N T1 T2 T3
Local
Isolator
Motor
3-11
L1
L2
PE
PE
*
External earth / ground
conductor if used.
Earth / ground
cables connected
through isolator
*
NOTE
Screen / armour must
be connected as shown
at each end of cable
sections.
*
If motor connection
box is plastic, screen
must be secured to the
metal frame of the
motor.
L3
N
E/Ground
Earth cables
to other
equipment in
enclosure
Brass earth studs
fixed through
back plate and
secured with
shake-proof
washers.
NB. Both 'PE'
terminals must
be externally
grounded (as
shown).