Harmonic Suppression Guideline In Japan - Mitsubishi Electric FR-E700EX Instruction Manual

3.1.4

Harmonic suppression guideline in Japan

Harmonic currents flow from the drive unit to a power receiving point via a power transformer. The harmonic suppression
guideline was established to protect other consumers from these outgoing harmonic currents.
"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 are exceeded, this
guideline requires the 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 for specific consumers
Class
Three-phase bridge
3
(Capacitor smoothing)
Self-excitation three-
5
phase bridge
Table 3 Equivalent Capacity Limits
Received Power Voltage
6.6kV
22/33kV
66kV or more
Table 4 Harmonic Contents (Values at the fundamental current of 100%)
Reactor
Not used
Three-phase bridge
Used (AC side)
(Capacitor
Used (DC side)
smoothing)
Used (AC, DC sides)
5th 7th 11th
3.5 2.5 1.6
1.8 1.3 0.82
1.2 0.86 0.55
Install, add or renew
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-E700EX 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
5th 7th
65 41
38 14.5
30 13
28 9.1
EMC and leakage currents
13th 17th
1.3 1.0
0.69 0.53
0.46 0.35
More than upper limit
Harmonic suppression
measures necessary
11th 13th 17th
8.5 7.7 4.3
7.4 3.4 3.2
8.4 5.0 4.7
7.2 4.1 3.2
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
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
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