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Appendix 7 - 2
Appendix 7 Higher Harmonic Suppression Measure Guidelines
MITSUBISHI CNC
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