# Harmonic Suppression Guideline - Mitsubishi Electric FR-F720P-0.75K to 110K Instruction Manual

Fr-f700p series.

3.1.4

## 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.
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 Later, this guideline was repealed on September 6, 2004.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".
"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
5th
Voltage
6.6kV
3.5
22kV
1.8
33kV
1.2
(1) Application of the harmonic suppression guideline for specific consumers
Class
Three-phase bridge
3
(Capacitor smoothing)
5
Self-exciting three-phase bridge
Table 3 Equivalent Capacity Limits
6.6kV
22/33kV
66kV or more
Table 4 Harmonic content (Values of the fundamental current is 100%)
Reactor
Not used
Used (AC side)
Used (DC side)
Used (AC, DC sides)
7th
11th
2.5
1.6
1.3
0.82
0.86
0.55
equipment
Calculation of equivalent
capacity total
Equal to or less
than reference
capacity
Equivalent
capacity total
Above reference
capacity
Calculation of outgoing
harmonic current
Not more than
harmonic current upper
limit?
Equal to or less
than upper limit
Harmonic suppression
measures unnecessary
Table 2 Conversion factors for FR-F700P series
Circuit Type
Without reactor
With reactor (AC side)
With reactor (DC side)
With reactor (AC, DC sides)
When high power factor converter is used
Reference Capacity
50kVA
300kVA
2000kVA
5th
7th
11th
65
41
8.5
38
14.5
7.4
30
13
8.4
28
9.1
7.2
EMC and leakage currents
13th
17th
19th
1.3
1.0
0.9
0.69
0.53
0.47
0.46
0.35
0.32
More than upper limit
Harmonic suppression
measures necessary
13th
17th
7.7
4.3
3.4
3.2
5.0
4.7
4.1
3.2
23rd
Over 23rd
0.76
0.70
0.39
0.36
0.26
0.24
Conversion Factor (Ki)
K31 = 3.4
K32 = 1.8
K33 = 1.8
K34 = 1.4
K5 = 0
19th
23rd
25th
3.1
2.6
1.8
1.9
1.7
1.3
3.2
3.0
2.2
2.4
1.6
1.4
3
49