Delta C2000 Series User Manual page 665

When an AC motor drive is installed in a noisy environment, radiated and/or conducted
noise via signal and power cables can interfere with the correct functioning, cause errors or even
damage to the drive. To prevent this, some AC motor drives have an enhanced noise resistance
but the results are limited and it is not economical. Therefore, an effective method would be finding
the cause of the noise and use the right solution to achieve "no emission, no transmission and no
reception of noise". All three solutions should be applied.
Finding the Noise
Ascertain whether the error is caused by noise.
Find the source of the noise and its transmission path.
Confirm the signal and the source of noise
Solutions
Grounding
Shielding
Filtering
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Preface