Harmonic Suppression Guidelines - Mitsubishi Electric FR-V500 Instruction Manual

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1.6.7

Harmonic suppression guidelines

Harmonic currents flow from the inverter to a power receiving point via a power transformer. The harmonic
suppression guidelines were established to protect other consumers from these outgoing harmonic currents.
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 Later, this guideline was repealed on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
5th
Power Voltage
6.6kV 3.5
22kV 1.8
33kV 1.2
(1) Application of the guideline for specific consumers
Class
Three-phase bridge
3
(Capacitor-smoothed)
Self-excitation three-phase
5
bridge
Table 3 Equivalent Capacity Limits
Received Power Voltage
6.6kV
22/33kV
66kV or more
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
Not more than
reference capacity
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.
Table 2 Conversion Factors for FR-V500 Series
Circuit Type
Without reactor
With reactor (AC side)
With reactor (DC side)
With reactors (AC, DC sides)
When high power factor converter is used
Reference Capacity
50kVA
300kVA
2000kVA
13th 17th
1.3 1.0
0.69 0.53
0.46 0.35
Over maximum value
Harmonic suppression
technique is not required.
20
19th 23rd Over 23rd
0.9 0.76 0.70
0.47 0.39 0.36
0.32 0.26 0.24
Conversion Factor Ki
K31 = 3.4
K32 = 1.8
K33 = 1.8
K34 = 1.4
K5 = 0