15
Wiring
2
INS
T
ALLA
TIO
N
A
ND
WIRING
(3) Total wiring length
The overall wiring length for connection of a single motor or multiple motors should be within the value in the table
below.
(4) Cable size of the control circuit power supply (terminal R1/L11, S1/L21)
· Terminal Screw Size: M4
· Cable size: 0.75mm
2
to 2mm
2
· Tightening torque: 1.5N·m
Pr. 72 PWM frequency selection
setting
(carrier frequency)
FR-F720-00046
FR-F740-00023
FR-F720-00077
FR-F740-00038
FR-F720-00105 or more
FR-F740-00052 or more
2
300m
(984.25 feet)
500m
(1640.42 feet)
500m
(1640.42 feet)
3 to 15
200m
(656.19 feet)
300m
(984.25 feet)
500m
(1640.42 feet)
Total wiring length
(FR-F720-00077 (FR-F740-00038) or more)
When driving a 400V class motor by the inverter, surge voltages attributable to the wiring constants may occur at
the motor terminals, deteriorating the insulation of the motor.
Take the following measures (1) or (2) in this case.
Connect the surge voltage suppression filter (FR-ASF-H) to the FR-F720-02330 (FR-F740-01160) or less and
the sine wave filter (MT-BSL/BSC) to the FR-F740-01800 or more on the inverter output side.
CAUTION
· Especially for long-distance wiring, the inverter may be affected by a charging current caused by the stray capacitances of the
wiring, leading to a malfunction of the overcurrent protective function or fast response current limit function or a malfunction or
fault of the equipment connected on the inverter output side. If fast-response current limit function malfunctions, disable this
function. (For
Pr.156 Stall prevention operation selection, refer tothe Instruction Manual (applied).
)
· For details of
Pr. 72 PWM frequency selection , refer to the Instruction Manual (applied)
.
For explanation of surge voltage suppression filter (FR-ASF-H) and sine wave filter (MT-BSL/BSC), refer to the manual of
each option.
500m
(1640.42feet)
or less
300m
(984.25feet)
300m
(984.25feet)
300m (984.25feet) + 300m (984.25feet)
= 600m (1968.50feet)
Summary of Contents for FR-F700 Series
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