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9. Connect the power cables
IEC connection diagram with shielded cables
L1
L2
L3
PE
4
2
1
(PE)
PE
(PE)
L1
L2
L3
1.
Two protective earth (ground) conductors. Drive safety standard
IEC/EN 61800-5-1 requires two PE conductors, if the cross-sectional
area of the PE conductor is less than 10 mm
example, you can use the cable shield in addition to the fourth
conductor.
NEC connection diagram with symmetrically shielded cable or conduit
Note: NEC installation can include separate insulated conductors inside a conduit, shielded VFD cable in conduit, or
shielded VFD cable without conduit. The normal dashed symbol (3) in this diagram represents the shield of shielded VFD
cable. The same solid symbol (2) represents conduit.
L1
L2
L3
PE
1
PE
L1
L2
L3
1.
Insulated ground conductor in a conduit: Ground to drive's PE
terminal and to the distribution panel ground bus. For a VFD cable
installation see 4.
2.
Conduit ground: Bond the conduit to the drive's conduit box and to
the distribution panel enclosure. For a VFD cable installation see 3.
Note: All openings in the drive enclosure must be closed with UL listed
devices having the same Type rating as the drive Type.
Connection procedure with VFD cable
For connection procedure with conduits, see
1.
Attach a residual voltage warning sticker in the local language.
2.
Frames R6 and R8: Remove the shroud on the power cable terminals.
3.
Frame R6: If you need more working space, unscrew the screw and lift the EMC
plate off. Install the EMC plate again after you have installed the motor and
input power cables.
Frame R8: Remove the EMC cover plates (3a).
UDC+
UDC-
T1/U T2/V T3/W
4
7
6
U1
5
2
Cu or 16 mm
UDC-
UDC+
T1/U T2/V T3/W
2
7
6
3
U1
5
Connection procedure with
2.
Use a separate grounding cable or a cable
with a separate PE conductor for the line
side, if the conductivity of the fourth
conductor or shield does not meet the
requirements for the PE conductor.
4
3.
Use a separate grounding cable for the
motor side, if the conductivity of the
shield is not sufficient, or if there is no
symmetrically constructed PE conductor
3
in the cable.
4.
360-degree grounding of the cable shield
is required for the motor cable and brake
resistor cable (if used). It is also
V1
W1
recommended for the input power cable.
PE
M
5.
External brake resistor connection (if
3
used).
6.
External brake chopper (if used).
7.
If necessary, install an external filter (du/
2
Al. For
dt, common mode, or sine filter). Filters
are available from ABB.
3.
Shield of a VFD shielded cable: Ground the
shield 360° under drive's grounding clamp,
then twist with the ground conductors and
connect under the drive's ground terminal.
Ground the shield also 360° at the motor
4
end, then twist and connect under the
motor's ground terminal. For a conduit
installation see 2.
4.
Symmetrically constructed grounding
conductors inside a VFD shielded cable:
Twist together, combine with the shield
and connect under the drive's ground
terminal and under the motor's ground
4
terminal. For a conduit installation see 1.
V1
W1
PE
5.
External brake resistor connection (if
M
used): For a conduit installation: See 1 and
3
2. For a VFD cable installation see 3 and 4.
In addition, cut the third phase conductor
which is not needed for the brake resistor
connection.
6.
External brake chopper (if used).
7.
If necessary, install an external filter (du/dt,
common mode, or sine filter). Filters are
available from ABB.
conduit.
4