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Appendix 7 Higher Harmonic Suppression Measure Guidelines
MITSUBISHI CNC
Appendix 7 - 2
Appendix 7.1 Higher Harmonic Suppression Measure Guidelines
These guidelines apply to users for which the 6-pulse equivalent capacity total of the installed higher harmonic generator
exceeds the reference in the following table. (Note that household appliances and general-purpose products having a
rated current of 20A/phase or less connected to a 300V or less commercial power supply are excluded from the
generators.)
Use the following flow chart to confirm whether the total exceeds the reference.
Higher Harmonic Suppression Guidelines were set in September 1994 by the Ministry of International Trade and
Industry's Agency of Natural Resources and Energy.
• Higher Harmonic Suppression Measure Guidelines for Household Appliances and General-purpose Products
• Higher Harmonic Suppression Measure Guidelines for Consumers Receiving High Voltage or Special High Voltage
Power
Higher harmonic
suppression measures
required
New installation, expansion or upgrading of facility
Calculation of total equivalent capacity
Calculation of higher harmonic current flow
Higher harmonic suppression measures not required
Higher harmonic current
Step 2
Total equivalent capacity
Step 1
Reference capacity exceeded
Reference capacity or less
Upper limit value exceeded
Upper limit