Wiring - Mitsubishi Electric FR-POL-H400K Instruction Manual

3

Wiring

Connect the balance reactor between each inverter and the motor as follows.
<Example of parallel connection of two inverters>
Inverter FR-POL
U U
V V
W W
Inverter FR-POL
U U
V V
W W
• Always connect one balance reactor to each inverter.
• FR-POL is usually earthed (grounded) by being mounted securely to the enclosure. If
FR-POL is not earthed (grounded) enough through the enclosure, use an earthing
(grounding) cable.
When using an earthing (grounding) cable, wire the cable to the mounting hole for
earthing (grounding) where varnish is removed.
(For the sizes of the cable and solderless terminal, refer to
Terminal. For the position of the varnish-removed mounting hole for earthing
(grounding), refer to
NOTE
• For the inverters operated in parallel, the phase sequence of the three phases
must be the same in the connection between the inverters and the balance
reactors and the connection between the balance reactors and the motor.
Otherwise, the inverter may become faulty or damaged.
• For the inverters operated in parallel, the wiring length for the three phases must
be the same in the connection between each inverter and each balance reactor
and the connection between each balance reactor and the motor. Otherwise,
normal operation may not be performed.
• Provide isolation treatment to avoid contact of terminals
X
Y
Motor
Z
U
V
M
W
X
Y
Z Earth
page 8.)
<Example of parallel connection of three inverters>
Inverter FR-POL
U U
V V
W W
Inverter FR-POL
U U
V V
W W
Inverter FR-POL
U U
V V
W W
4 Cable Size and Crimp
.
X
Y
Z
Motor
X
U
Y V
M
Z
W
Earth
X
Y
Z
5
Wiring