Mitsubishi Electric FR-CC2-P, Инструкция по эксплуатации

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Power supply harmonics
PRECAUTIONS FOR USE OF THE CONVERTER UNIT
69
3
Installation of power factor
improving capacitor When used with a reactor connected in series, the power factor improving correction capacitor can absorb
harmonic currents.
Transformer multi-phase
operation
Use two transformers with a phase angle difference of 30° as in -

and

-

combinations to provide an
effect corresponding to 12 pulses, reducing low-degree harmonic currents.
Passive filter
(AC filter) A capacitor and a reactor are used together to reduce impedances at specific frequencies. Harmonic currents
are expected to be absorbed greatly by using this technique.
Active filter
(Active filter)
This filter detects the current in a circuit generating a harmonic current and generates a harmonic current
equivalent to a difference between that current and a fundamental wave current to suppress the harmonic
current at the detection point. Harmonic currents are expected to be absorbed greatly by using this technique.
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