Mitsubishi Electric FR-F700PJ Series Manual page 75

 Harmonic suppression guideline
Inverters have a converter section (rectifier circuit) and generate a
harmonic current.
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 Guidelines for
Household Appliances and General-Purpose Products" and other
models are covered by "Harmonic Suppression Guidelines for
Consumers Who Receive High Voltage or Special High Voltage".
However, the transistorized inverter has been excluded from the target
products covered by "Harmonic Suppression Guidelines for Household
Appliances and General-Purpose Products" in January 2004 and
"Harmonic Suppression Guidelines for Household Appliances and
General-Purpose Products" was repealed on September 6, 2004.
All capacity and all models of general-purpose inverter used by specific
consumers are covered by "Harmonic Suppression Guidelines for
Consumers Who Receive High Voltage or Special High Voltage"
(hereinafter referred to as "Specific Consumer Guidelines").
 Harmonic Suppression Guideline for Consumers Who Receive High
Voltage or Special High Voltage
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.
Users who use models other than the target models are not covered by
the guideline. However, we ask to connect an AC reactor and a DC
reactor as before.
For compliance to the "Harmonic Suppression Guideline for
Consumers Who Receive High Voltage or Special High Voltage"
Input
Target
Power
Capacity
Supply
Make a judgment based on the "Harmonic
Suppression Guideline for Consumers Who
Receive High Voltage or Special High Voltage"
issued by the Japanese Ministry of Economy,
Trade and Industry (formerly Ministry of
International Trade and Industry) in
September 1994 and take measures if
necessary. For calculation method of power
Three-
phase
supply harmonics, refer to materials below.
All
200V
Reference materials
Three-
capacities
 "Harmonic suppression measures of the
phase
400V
general-purpose inverter"
Jan., 2004 Japan Electrical Manufacturer's
Association
 "Calculation method of harmonic current of
the general-purpose inverter used by
specific consumers"
JEM-TR201 (Revised in December 2003) :
Japan Electrical Manufacturer's Association
Measures
For compliance to "Harmonic suppression guideline of the general-
purpose inverter (input current of 20A or less) for consumers other than
specific consumers" published by JEMA
Input
Target
Power
Capacity
Supply
Connect the AC reactor or DC reactor
recommended in a catalog or an instruction
manual.
Three- Reference materials
3.7kW
 "Harmonic suppression guideline of the
phase
or less
200V general-purpose inverter (input current of
20A or less)"
JEM-TR226 (Revised in December 2003) :
Japan Electrical Manufacturer's Association
 Calculation of outgoing harmonic current
Outgoing harmonic current = fundamental wave current (value converted
from received power voltage)  operation ratio  harmonic content
 Operation ratio: Operation ratio = actual load factor  operation time
ratio during 30 minutes
 Harmonic content: Found in Table.
Table 1: Harmonic content (Values of the fundamental current is 100%)
Reactor 5th 7th 11th 13th 17th 19th 23th 25th
Not used
65
Used (AC side) 38 14.5
Three-phase
Used (DC side)
bridge
or with
30
(Capacitor
Filterpack
smoothing)
Used (AC, DC
28
sides)
Table 2: Rated capacities and outgoing harmonic currents
of inverter-driven motors
Fundamental Fundamental
Applied Wave Current Wave Current Rated
Motor (A) Converted Capacity
kW from 6.6kV (kVA)
200V 400V
(mA)
0.4
1.61 0.81 49 0.57
0.75
2.74 1.37 83 0.97
1.5
5.50 2.75 167 1.95
2.2 7.93 3.96 240 2.81
3.7
13.0 6.50 394 4.61
5.5 19.1 9.55 579 6.77
7.5
25.6 12.8 776 9.07
11 36.9 18.5 1121 13.1
15
49.8 24.9 1509 17.6
Table 3: Conversion factors
Classification Circuit type
Three-phase bridge
3
(Capacitor smoothing)
Self-excitation
5
three-phase bridge
Measures
41 8.5 7.7 4.3 3.1 2.6 1.8
7.4 3.4 3.2 1.9 1.7 1.3
13 8.4 5.0 4.7 3.2 3.0 2.2
9.1 7.2 4.1 3.2 2.4 1.6 1.4
Fundamental Wave Current
Converted from 6.6kV
(No reactor, 100% operation ratio)
5th 7th 11th 13th 17th 19th 23th 25th
31.85 20.09 4.165 3.773 2.107 1.519 1.274 0.882
53.95 34.03 7.055 6.391 3.569 2.573 2.158 1.494
108.6 68.47 14.20 12.86 7.181 5.177 4.342 3.006
156.0 98.40 20.40 18.48 10.32 7.440 6.240 4.320
257.1 161.5 33.49 30.34 16.94 12.21 10.24 7.092
376.1 237.4 49.22 44.58 24.90 17.95 15.05 10.42
504.4 318.2 65.96 59.75 33.37 24.06 20.18 13.97
728.7 459.6 95.29 86.32 48.20 34.75 29.15 20.18
980.9 618.7 128.3 116.2 64.89 46.78 39.24 27.16
Conversion
coefficient Ki
Without reactor K31 = 3.4
With reactor (AC side) K32 = 1.8
With reactor (DC side) K33 = 1.8
With reactors (AC, DC sides) K34 = 1.4
When a high power factor
K5 = 0
converter is used
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