Harmonic Suppression Guideline - Mitsubishi Electric FR-E520 Instruction Manual

2.3.2

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 currents.
1) "Harmonic suppression guideline for household appliances and general-purpose
products"
This guideline was issued by Ministry of Economy, Trade and Industry (formerly
Ministry of International Trade and Industry) in September, 1994 and applies to 200V
class inverters of 3.7kW or less*. By installing the FR-BEL or FR-BAL power factor
improving reactor, inverters comply with the "haramonic suppression techniques for
transistorized inverters (input current 20A or less)" established by the Japan
Electrical Manufacturers' Association. Therefore install the optional reactor for the
200V class, 3.7kW or less inverter.
* For the single-phase 200V class, the guideline applies to 2.2kW and less models.
For the single-phase 100V class, the guideline applies to 0.75kW and less models.
2) "Harmonic suppression guideline for specific consumers"
This guideline sets forth the maximum values of harmonic currents outgoing from a
high-voltage or specially 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
6.6kV
22kV
33kV
(1) Application of the harmonic suppression guideline for specific
consumers
Not more than
reference capacity
5th 7th 11th
3.5 2.5 1.6
1.8 1.3 0.82
1.2 0.86 0.55
New installation/addition/
renewal of equipment
Calculation of equivalent
capacity sum
Sum of equivalent
capacities
Over reference
capacity
Calculation of outgoing
harmonic current
Is outgoing harmonic
current equal to or lower
than maximum value?
Not more than
maximum value
Harmonic suppression
technique is not required.
39
INSTALLATION AND WIRING
13th 17th 19th
1.3 1.0
0.69 0.53 0.47
0.46 0.35 0.32
Over maximum value
Harmonic suppression
technique is required.
Over
23rd
23rd
0.9 0.76 0.70
0.39 0.36
0.26 0.24
2