Page 132 - SACE Tmax XT - Catalogue

5/6 SACE TMAX XT LOW VOLTAGE MOLDED CASE CIRCUIT-BREAKERS

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Network Analyzer

U Network

Network Non-linear current leads
to non-linear voltage

I hrm

Overload! Overheating!

Harmonic generator Power factor correction

Power electronics produce harmonic content that To get information about the harmonic content of
can affect other loads in the plant: the result can voltage and current waveforms and to take mea-
be an overheating of the asynchronous motor and sures if such values are high, a dedicated index
an overload (that could lead to a trip of the pro- has been defined. The total harmonic distortion
tecting MCCB) on the power factor correction ca- (THD) of a signal is a measurement of the har-
pacitors. monic distortion present.