Mitsubishi Electric FR-D720S SC EC, Instruction Manual

Page: 47 / 512

Wiring Main circuit connection
FR-D700 SC EC 3 - 11
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
400V class
Pr. 72 "PWM frequency
selection" Setting
(Carrier Frequency)
FR-D720S-
008SC 014SC 025SC 042SC
≥
070SC
≤
1 (1kHz) 200 m 200 m 300 m 500 m 500 m
2 to 15 (2kHz to 14,5kHz) 30 m 100 m 200 m 300 m 500 m
Tab. 3-7: Total wiring length
Pr. 72 "PWM frequency
selection" Setting
(Carrier Frequency)
FR-D740-
012SC 022SC 036SC 050SC
≥
080SC
≤
1 (1kHz) 200 m 200 m 300 m 500 m 500 m
2 to 15 (2kHz to 14,5kHz) 30 m 100 m 200 m 300 m 500 m
Tab. 3-8: Total wiring length
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.
I001980E
≤
500m
300m
300m
300m + 300m = 600m