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Peripheral Devices
1.10.7 Power 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 harmonics.
1) [Harmonic suppression guideline for household appliances and general-purpose
products]
The "harmonic suppression guideline for household appliances and general-
purpose products" issued by Ministry of Economy, Trade and Industry (formerly
Ministry of International Trade and Industries) in September, 1994 applies to the
FR-C500 series. By installing the FR-BEL or FR-BAL power factor improving
reactor, this product complies with the "harmonic suppression techniques for
transistorized inverters (input current 20A or less)" established by the Japan
Electrical Manufacturers' Association.
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
5th
Voltage
6.6kV
3.5
22kV
1.8
33kV
1.2
(1) Application of the harm onic suppression guideline for specific consum ers
Not more
than reference
capacity
Over reference capacity
7th
11th
2.5
1.6
1.3
0.82
0.86
0.55
New installation/addition/
renewal of equipment
Calculation of equivalent
capacity sum
Sum of
equivalent capacities
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.
13th
17th
1.3
1.0
0.69
0.53
0.46
0.35
Over maximum value
Harmonic suppression
technique is required.
30
19th
23rd
0.9
0.76
0.47
0.39
0.32
0.26
Over
23rd
0.70
0.36
0.24
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