In all cases a shielded motor cable must be used, and an EMC filter is required for all drives with a rated input current of less than 100 A. The drive

contains an integral filter for basic emission control. In some cases feeding the motor cables (U, V and W) once through a ferrite ring can maintain

compliance for longer cable lengths. For longer motor cables, an external filter is required. Where a filter is required refer to Figure 2.10 EMC filters .

Where a filter is not required, follow the guidelines given in section 4.17 General requirements for EMC on page 98.

The second environment typically includes an industrial low-voltage power supply network which does not supply buildings used for

residential purposes. Operating the drive in this environment without an external EMC filter may cause interference to nearby electronic

equipment whose sensitivity has not been appreciated. The user must take remedial measures if this situation arises. If the consequences

of unexpected disturbances are severe, it is recommended that the guidelines in section 4.17.3 Sensitive control signal on page 100 be

CAUTION

adhered to.

Detailed instructions and EMC information are given in section 2.10 EMC filters on page 22.

4.17.3

Sensitive control signal

The following information applies to sizes 3 to 7. Avoid placing sensitive signal circuits in a zone 300 mm (12 in) in the area immediately surrounding

the power module. Ensure good EMC grounding.

Figure 4-32 Sensitive signal circuit clearance

100

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≥300 mm