Mitsubishi Electric FR-D720S SC EC Instruction Manual page 47

Wiring
Total wiring length
The maximum possible length of the motor cables depends on the capacity of the inverter and
the selected carrier frequency.
The lengths in the following tables are for unshielded cables. When shielded cables are use di-
vide the values listed in the table by 2.
200V class
Pr. 72 "PWM frequency
selection" Setting
(Carrier Frequency)
2 to 15 (2kHz to 14,5kHz)
Tab. 3-7: Total wiring length
400V class
Pr. 72 "PWM frequency
selection" Setting
(Carrier Frequency)
2 to 15 (2kHz to 14,5kHz)
Tab. 3-8: Total wiring length
FR-D700 SC EC
008SC
≤ 1 (1kHz)
200 m
30 m
012SC
≤ 1 (1kHz)
200 m
30 m
≤ 500m
300m
300m
300m + 300m = 600m
FR-D720S-
014SC 025SC
200 m 300 m
100 m 200 m
FR-D740-
022SC 036SC
200 m 300 m
100 m 200 m
Fig. 3-5:
Remember that in the table above the total
wiring length is what is being referred to. In
parallel connections of several motors every
motor wire must be counted. In this example,
for the inverter FR-D720S-070SC or more or
FR-D740-080SC or more the permissible
wiring length is exceeded by the two parallel
motor lead wires.
Main circuit connection
≥ 070SC
042SC
500 m 500 m
300 m 500 m
≥ 080SC
050SC
500 m 500 m
300 m 500 m
I001980E
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