Mitsubishi Electric FR-A520-0.4K -55K Instruction Manual page 43

4) Harmonic suppression techniques
No. Item
Reactor installation Install a reactor (ACL) in the AC side of the inverter or a reactor (DCL) in its DC side or both to
1
(ACL, DCL) suppress outgoing harmonic currents.
High power factor The converter circuit is switched on-off to convert an input current waveform into a sine wave,
2 converter suppressing harmonic currents substantially. The high power factor converter (FR-HC) is used
(FR-HC) with the standard accessory.
Installation of power
When used with a series reactor, the power factor improving capacitor has an effect of absorbing
3 factor improving
harmonic currents.
capacitor
Use two transformers with a phase angle difference of 30° as in Y-∆, ∆-∆ combination to provide
Transformer multi-
4
phase operation an effect corresponding to 12 pulses, reducing low-degree harmonic currents.
A capacitor and a reactor are used together to reduce impedance at specific frequencies,
5 AC filter
producing a great effect of absorbing harmonic currents.
This filter detects the current of a circuit generating a harmonic current and generates a
harmonic current equivalent to a difference between that current and a fundamental wave
6 Active filter
current to suppress a harmonic current at a detection point, providing a great effect of absorbing
harmonic currents.
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
INSTALLATION AND WIRING
Description
32