Mitsubishi Electric FR-A700 Instruction Manual page 53

Wiring
Total wiring lenght
The maximum possible length of the motor cables depends on the capacity of the inverter and
the selected carrier frequency. The cables should never be longer than 100m (unshielded).
The lengths in the following table are for unshielded cables. When shielded cables are use di-
vide the values listed in the table by 2. Note that the values are for the total wiring length – if you
connect more than one motor in parallel you must add the lengths of the individual motor cables.
Pr. 72 "PWM frequency selection" setting (carrier frequency)
Tab. 3-5: Total wiring lenght
NOTE For the 02160 or more, the setting range of Pr. 72 PWM frequency selection is "0 to 6".
NOTE Note that the motor windings are subjected to significantly higher loads when the motor is
operated by inverter than with normal mains operation. The motors must be approved for
inverter operation by the manufacturer (refer also to section 3.9.5).
FR-A700 EC
≤ 2 (2kHz)
3 (3kHz), 4 (4kHz)
5 (5kHz) to 9 (9kHz)
≥ 10 (10kHz)
≤ 500m
300m
300m
300m + 300m = 600m
Main circuit connection
00023
300m
200m
Fig. 3-7:
Total wiring lenght (00052 or more)
≥ 00052
00038
500m 500m
300m 500m
100m
50m
I001017E
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