Filter
Top Products
20
Main circuit terminals
1.2.11 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 current.
The three-phase 200V input specifications 3.7kW or less are previously covered by
"Harmonic suppression guideline for household appliances and general-purpose
products" and other models are covered by "Harmonic suppression guideline for
consumers who receive high voltage or special high voltage". However, the general-
purpose inverter has been excluded from the target products covered by "Harmonic
suppression guideline for household appliances and general-purpose products" in
January 2004. Later, this guideline was repealed on September 6, 2004. All capacities
of all models are now target products of "Harmonic suppression guideline for
consumers who receive high voltage or special high voltage" (hereinafter referred to
as "Guideline for specific consumers").
"Guideline for specific consumers"
This guideline sets forth the maximum values of harmonic currents outgoing from a
high-voltage or especially 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 5th 7th 11th 13th 17th 19th 23rd
Over
23rd
6.6 kV 3.5 2.5 1.6 1.3 1.0 0.9 0.76 0.70
22 kV 1.8 1.3 0.82 0.69 0.53 0.47 0.39 0.36
33 kV 1.2 0.86 0.55 0.46 0.35 0.32 0.26 0.24