Wiring
Page 27 / 52
Notes:
-
Field wiring connections must be made by a UL listed and CSA certified closed-loop terminal connector
sized for the wire gauge involved. The connector must be fixed using the crimp tool specified by the
connector manufacturer.
-
Only use a fuse that has the appropriate rated current.
-
Be sure to use bigger wires for mains circuit cables and motor cables if the distance exceeds 20m.
*)
Use 0,75mm
2
for the alarm signal wire. The wire stripping length should be approximately 5–6 mm. The wire
sleeve diameter except for the alarm signal wire should not be greater than 2mm.
Part description
Function
AC reactor
This part is used when the unbalance ratio is
3% or more and the power supply is 500kVA
or more, and there are rapid changes in the
power supply. This part also improves the
power factor.
EMI filter
(
Note
)
This part is used to conform with the
applicable
EMC standards.
DC reactor
This part is used to improve the power factor.
Radio noise filter
This part reduces noise generated at the
output of the inverter (this type of filter
supplies an almost perfect sine shaped output
voltage between phase-pase and phase-PE).
Motor filter
Motors that are driven by an inverter are to a
larger extent subject to voltage fluctuations
than motors directly driven (without inverter) by
power lines. An AC reactor installed between
inverter output and motor smoothens motor
run and so reduces torque ripple. When the
cable between the inverter and the motor is
too long, this part also forces the voltage dv/dt
to be limited and so protects the isolation of
the motor.
Note:
Usage of an EMI filter (e.g. one from the UHZNF series) is
necessary for the European EMC directive, for the Australian C-
TICK and others. In comparison, the other parts mentioned in the
table above are not intended for this special use.
L1
(L1)
L2
L3
(N)
(T1)
U
(T2)
V
(T3)
W
+1
+
Motor
Thermal
relays