55
Note: The parameter values in the table are for recommendation.
(3) When the contactor is used for power supply control, do not use the contactor to control power on/off of the drive.
(4) AC input reactor
If the power grid waveform distortion is severe, or the interaction of high-order harmonics between the drive and the
power supply still cannot meet the requirements after the drive is configured with a DC reactor, an AC input reactor can
be added. The AC input reactor can also improve the power factor at the input end of the drive.
(5) AC output reactor
When the distance between the drive and the motor exceeds 80 meters, it is recommended to use multi-paired cables
and install an AC output reactor that can suppress the high-frequency oscillation, so as to avoid motor insulation
damage, excessive leakage current and frequent drive protection.
(6) Input EMI filter
An EMI filter is optional to suppress high-frequency noise interference emitted from the power cable of the drive.
(7) Output EMI filter
An EMI filter is optional to suppress noise interference and wire leakage current generated at the output end of the
drive.
(8) Safety grounding cable
There is leakage current in the drive. To ensure safety, the drive and the motor must be grounded, and the ground
resistance should be less than 10
Ω
. The grounding cable should be made as short as possible and its diameter should
comply with the standards in Table 4-4.
Note: The values in the table are correct only when the same metal is used for both two conductors. If not, the cross
sectional area of the protective conductor should be determined by using the equivalent conductivity coefficient
method.
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