Mitsumi electronic 55K Japanese harmonic suppression guidelines, Class Circuit Type

INSTALLATION AND WIRING

2.3.2 Japanese harmonic suppression guidelines

Harmonic currents flow from the inverter to a power receiving point via a power transformer. The harmonic suppression guidelines were established to protect other consumers from these outgoing harmonic currents.

1)"Harmonic suppression guideline for household appliances and general-purpose products"

This guideline was issued by Ministry of Economy, Trade and Industry (formerly Ministry of International Trade and Industry) in September, 1994 and applies to 200V class inverters of 3.7kW (5HP) and less. By installing the FR-BEL or FR-BAL power factor improving reactor, inverters comply with the “harmonic suppression techniques for transistorized inverters (input current 20A or less)” established by the Japan Electrical Manufacturers′ Association. Therefore install the optional reactor for the 200V class, 3.7kW (5HP) or less inverter.

2)"Harmonic suppression guideline for specific consumers"

This guideline sets forth the maximum values of harmonic currents outgoing from a high-voltage or especially high-voltage consumer who will install, add or renew harmonic generating equipment. If any of the maximum values are exceeded, this guideline requires that consumer to take certain suppression measures.

Table 1 Maximum Values of Outgoing Harmonic Currents per 1kW Contract Power

Received Power	5th	7th	11th	13th	17th	19th	23rd	Over 23rd
Voltage
6.6kV	3.5	2.5	1.6	1.3	1.0	0.9	0.76	0.70
22kV	1.8	1.3	0.82	0.69	0.53	0.47	0.39	0.36
33kV	1.2	0.86	0.55	0.46	0.35	0.32	0.26	0.24

(1) Application of the harmonic suppression guideline for specific consumers

New installation/addition/renewal of equipment

Calculation of equivalent capacity sum

Not more than

reference capacity

Sum of equivalent capacities

Over reference capacity

Calculation of outgoing harmomic current

Is outgoing harmonic cur-		Over maximum value
rent equal to or lower than
maximum value ?
	Not more than	Harmomic suppression technique is required.
	maximum value
Harmomic suppression technique is not required.

Table 2 Conversion Factors for FR-F500 Series

Class		Circuit Type	Conversion Factor Ki
		Without reactor	K31 = 3.4
3	3-phase bridge	With reactor (AC side)	K32 = 1.8
	(Capacitor-smoothed)	With reactor (DC side)	K33 = 1.8
		With reactors (AC, DC sides)	K34 = 1.4
5	Self-exciting 3-phase bridge	When high power factor converter is used	K5 = 0

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