Mitsumi electronic 55K, FR-F520-0.75K Harmonic suppression techniques, Acl, Dcl, Fr-Hc

		INSTALLATION AND WIRING
4) Harmonic suppression techniques
No.	Item	Description
1	Reactor installation	Install a reactor (ACL) in the AC side of the inverter or a reactor (DCL) in its DC side or both to
	(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
4	Transformer multi-	Use two transformers with a phase angle difference of 30° as in	-∆ , ∆ -∆combination to
	phase operation	provide an effect corresponding to 12 pulses, reducing low-degree harmonic currents.
5	AC filter	A capacitor and a reactor are used together to reduce impedance at specific frequencies,
		producing a great effect of absorbing harmonic currents.
		This filter detects the current of a circuit generating a harmonic current and generates a
6	Active filter	harmonic current equivalent to a difference between that current and a fundamental wave
		current to suppress a harmonic current at a detection point, providing a great effect of absorbing
		harmonic currents.

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