Mitsubishi Electric 700 Series Instruction Manual page 30

(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.
Pr. 72 PWM frequency selection
Setting
(carrier frequency)
200V class
1 (1kHz) or less
400V class
2 to15 200V class
(2kHz to 14.5kHz) 400V class
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. In this case, refer to page 39.
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 malfunction of fast-response current limit function occurs, disable this function. If malfunction of stall prevention
function occurs, increase the stall level. (Refer to page 101 for Pr. 22 Stall prevention operation level and Pr. 156 Stall prevention
operation selection )
Refer to page 163 for details of Pr. 72 PWM frequency selection.
When using the automatic restart after instantaneous power failure function with wiring length exceeding 100m,
select without frequency search (Pr. 162 = "1 (initial value), 11"). (Refer to page 151)
0.1K 0.2K 0.4K
200m 200m 300m
- - 200m
30m 100m 200m
- - 30m
Total wiring length (3.7K or higher)
500m or less
300m+300m=600m
Main circuit terminal specifications
0.75K 1.5K 2.2K
500m 500m 500m
200m 300m 500m
300m 500m 500m
100m 200m 300m
300m
300m
3.7K
or Higher
500m
500m
500m
500m
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