ABB RDNA-01 User Manual download pdf (Page 287)

ACS550-01/U1 User’s Manual 287

Technical data

Motor cable requirements for CE & C-Tick compliance

The requirements in this section apply for CE or C-Tick compliance.

Minimum requirement (CE & C-Tick)

The motor cable must be a symmetrical three conductor cable with a concentric PE

conductor or a four conductor cable with a concentric shield, however, a symmetrical

constructed PE conductor is always recommended. The following figure shows the

minimum requirement for the motor cable shield (for example, MCMK, Draka NK

Cables).

Recommendation for conductor layout

The following figure compares conductor layout features in motor cables.

Insulation jacket Copper wire shield

Cable core

Inner insulation

Symmetrical shielded cable: three phase

conductors and a concentric or otherwise

symmetrically constructed PE conductor, and a

shield

Recommended (CE & C-Tick)

conductor

and shield

A separate PE conductor is required if the

conductivity of the cable shield is < 50% of the

conductivity of the phase conductor.

Not allowed for motor cables (CE & C-Tick)

Shield

Allowed for motor cables with phase

conductor cross section up to 10 mm

A four-conductor system: three phase

conductors and a protective conductor, without a

shield.

Allowed (CE & C-Tick)

Shield

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ABB RDNA-01 User Manual Page 287