AC90 TENSION CONTROL FREQUENCY INVERTER MANUAL BASIC OPERATION AND TRIAL RUN
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Shield of inverter power cable, motor cable, control cable Cable
Shielding layer (reticulate/armoured) should be winded reliably by cable earth card and fix to inverter earth piece by bolt.
Please refer to the following chart.
Chart 3-6
：
Cable earth card for cables earthing
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Corresponding relationship between inverter/motor cable length and carrier frequency.
While cable distance between inverter and motor is long (especially low frequency output), cable voltage drop will make
motor torque reduce. Further more, cable HF leakage current will increase. Then inverter output current will increase,
that will cause inverter over-current trip. The current detection accuracy and running stability will be impacted. Please
follow as below chart to adjust carrier frequency according to the cable length. While the cable distance is over 100m,
please adopt distributed capacity reduce measure (Such as “no metal conductor covers cable”, “wire each phase cable
apart” and so on).
Cable length
<20m
20~50m
50~100m
>100m
Carrier frequency
0.6~16kHz
0.6~8kHz 0.6~4kHz 0.6~2kHz
Chart 3-2
：
Corresponding relationship between inverter/motor cable length and carrier frequency
