Mitsubishi Electric FR-F800 Series Instruction Manual page 99

3.2.2 Harmonic suppression guidelines in Japan
Inverters have a converter section (rectifier circuit) and generate a harmonic current.
Harmonic currents flow from the inverter to a power receiving point via a power transformer. The Harmonic Suppression
Guidelines was established to protect other consumers from these outgoing harmonic 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 products covered by "the Harmonic Suppression Guidelines for Household Appliances and General-
purpose 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Products" was repealed on September 6, 2004.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 suppression measures.
• Maximum values of outgoing harmonic currents per 1 kW contract power
Received
power voltage
6.6 kV 3.5
22 kV 1.8
33 kV 1.2
 Application of the specific consumer guidelines
 Conversion factor
Classification
3
5
98
3. PRECAUTIONS FOR USE OF THE INVERTER
3.2 Power supply harmonics
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5th 7th 11th
2.5 1.6
1.3 0.82
0.86 0.55
Install, add or renew
equipment
Calculation of equivalent
capacity total
Equal to or less
than reference
capacity
Equivalent
capacity total
Above reference
capacity
Calculation of outgoing
harmonic current
Not more than
harmonic current upper
Harmonic suppression
measures unnecessary
Three-phase bridge (capacitor
smoothing)
Self-excitation three-phase bridge
search engine
13th 17th
1.3 1.0
0.69 0.53
0.46 0.35
More than upper limit
limit?
Harmonic suppression
measures necessary
Equal to or less
than upper limit
Circuit type
Without reactor
With reactor (AC side)
With reactor (DC side)
With reactors (AC, DC sides)
When a high power factor converter
is used
19th 23rd
0.9 0.76 0.70
0.47 0.39 0.36
0.32 0.26 0.24
Conversion factor Ki
K31 = 3.4
K32 = 1.8
K33 = 1.8
K34 = 1.4
K5 = 0
Over 23rd