Siemens DTU3005-B Spezifikationen PDF herunterladen (Seite 25)

Harmonic Effects All harmonics cause additional heat in conductors and other

distribution system components. Negative sequence harmonics

can be problematic in induction motors. The reverse phase

rotation of negative harmonics reduces forward motor torque

and increases the current demand.

Zero sequence harmonics add together, creating a single-phase

signal that does not produce a rotating magnetic field. Zero

sequence harmonics can cause additional heating in the neutral

conductor of a 3Ø, 4-wire system. This can be a major problem

because the neutral conductor typically is not protected by a

fuse or circuit breaker.

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Siemens DTU3005-B Spezifikationen Seite 25