Harmonic Suppression Guidelines In Japan - Mitsubishi Electric FR-A820-00046 Instruction Manual

Power supply harmonics
3.2.2

Harmonic suppression guidelines in Japan

Harmonic currents flow from the inverter to a power receiving point via a power transformer. The Har-
monic Suppression Guidelines was established to protect other consumers from these outgoing har-
monic currents.
The three-phase 200 V input specifications 3.7 kW or lower were previously covered by "the Harmonic
Suppression Guidelines for Household Appliances and General-purpose Products" and other models
were covered by "the Harmonic Suppression Guidelines for Consumers Who Receive High Voltage or
Special High Voltage". However, the transistorized inverter has been excluded from the target prod-
ucts covered by "the Harmonic Suppression Guidelines for Household Appliances and General-pur-
pose Products" in January 2004 and "the Harmonic Suppression Guideline for Household Appliances
and General-purpose Products" was repealed on September 6, 2004.
All capacity and all models of general-purpose inverter used by specific consumers are now covered
by "the Harmonic Suppression Guidelines for Consumers Who Receive High Voltage or Special High
Voltage" (hereinafter referred to as "the Specific Consumer Guidelines").
"Specific Consumer Guidelines"
This guideline sets forth the maximum harmonic currents outgoing from a high-voltage or especially
high-voltage receiving 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 sup-
pression measures.
Received power
voltage
6.6 kV
22 kV
33 kV
Tab. 3-7:
Application of the specific consumer guidelines
Fig. 3-10:
3 - 12
5th 7th
3.5 2.5
1.8 1.3
1.2 0.86
Maximum values of outgoing harmonic currents per 1 kW contract power
Install, add or renew
Calculation of equivalent
Equal to or less
than reference
capacity
Above reference
capacity
Calculation of outgoing
harmonic current
Harmonic suppression
measures unnecessary
Application of the specific consumer guidelines
11th 13th 17th
1.6 1.3 1.0
0.82 0.69 0.53
0.55 0.46 0.35
equipment
capacity total
Equivalent
capacity total
Not
More than upper limit
more than
harmonic current
upper limit?
Harmonic suppression
Equal to or less
measures necessary
than upper
limit
Precautions for use of the inverter
19th 23rd
0.9 0.76
0.47 0.39
0.32 0.26
Over 23rd
0.70
0.36
0.24
I002422E