Mitsubishi Electric FR-D700 Instruction Manual page 29

Main circuit terminal specifications
(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.
200V class
Pr. 72 PWM frequency
selection Setting
(carrier frequency)
1 (1kHz) or less
2 to15
(2kHz to 14.5kHz)
400V class
Pr. 72 PWM frequency
selection Setting
(carrier frequency)
1 (1kHz) or less
2 to15
(2kHz to 14.5kHz)
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.(Refer to page 78)
NOTE
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, fast response current limit
function, or stall prevention function or a malfunction or fault of the equipment connected on the inverter output side.
If fast-response current limit malfunctions, disable this function. When the stall prevention function misoperates,
increase the stall level. (Refer to page 74 for Pr. 22 Stall prevention operation level and Pr. 156 Stall prevention operation selection )
Refer to page 143 for details of Pr. 72 PWM frequency selection. Refer to the manual of the option for details of surge voltage
suppression filter (FR-ASF-H/FR-BMF-H).
When using the automatic restart after instantaneous power failure function with wiring length exceeding below,
select without frequency search (Pr. 162 = "1, 11"). ( Refer to page 131)
Motor capacity
Wiring length
18
008 014
200m 200m
30m 100m
012 022
200m 200m
30m 100m
Total wiring length (FR-D720S-070 or more, FR-D740-080 or more)
300m+300m=600m
0.1K
20m
025 042
300m 500m
200m 300m
036 050
300m 500m
200m 300m
500m or less
300m
300m
0.2K
50m
070
or More
500m
500m
080
or More
500m
500m
0.4K or more
100m