Mitsubishi Electric FR-E540 Instruction Manual download pdf (Page 40)

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

Voltage

5th 7th 11th 13th 17th 19th 23rd Over 23rd

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

(

)

Application of the harmonic suppression guideline for specific consumers

New installation/addition/renewal of equipment

Sum of equivalent capacities

Over reference capacity

Is outgoing harmonic cur-

rent equal to or lower than

maximum value

Over maximum value

Not more than

maximum value

Not more than

reference capacity

Calculation of equivalent capacity sum

Calculation of outgoing harmomic current

Harmomic suppression technique is required.

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

With reactor (AC side) K32 = 1.8

With reactor (DC side) K33 = 1.8

3-phase bridge

(Capacitor-smoothed)

With reactors (AC, DC sides) K34 = 1.4

5 Self-exciting 3-phase bridge When high power factor converter is used K5 = 0

1 2 ... 35 36 37 38 39 40 41 42 43 44 45 ... 216 217

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Mitsubishi Electric FR-E540 Instruction Manual Page 40

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