Japanese Harmonic Suppression Guideline - Mitsubishi FR-E520-0.1KN Instruction Manual

2.3.2 Japanese harmonic suppression guideline

Harmonic currents flow from the inverter to a power receiving point via a power
transformer. The harmonic suppression guideline was 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 the Ministry of International Trade and Industries in
September, 1994 and applies to 3-phase 200V class inverters of 3.7kW or 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 3-phase 200V class, 3.7kW 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 specially high-voltage consumer who will install, add or renew
harmonic generating equipment. If any of the maximum values is 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
6.6kV
22 kV
33 kV
(1) Application of the harmonic suppression guideline for specific
consumers
Not more than
reference capacity
5th 7th
3.5 2.5
1.8 1.3
1.2 0.86
New installation/addition/
renewal of equipment
Calculation of equivalent
capacity sum
Sum of equivalent
capacities
Over reference
capacity
Calculation of outgoing
harmonic current
Is outgoing harmonic
current equal to or lower
than maximum value?
Not more than
maximum value
Harmonic suppression
technique is not required.
INSTALLATION AND WIRING
11th 13th 17th
1.6 1.3 1.0
0.82 0.69 0.53
0.55 0.46 0.35
Over maximum value
Harmonic suppression
technique is required.
32
Over
19th 23rd
23rd
0.9 0.76 0.70
0.47 0.39 0.36
0.32 0.26 0.24