Mitsubishi Electric 800 Series Hardware Instruction Manual page 84

All capacity and all models of general-purpose inverter used by specific consumers are now covered by "the Harmonic
Suppression Guidelines for Consumers Who Receive High Voltage or Special High Voltage" (hereinafter referred to as "the
Specific Consumer Guidelines").
• "Specific Consumer Guidelines"
This guideline sets forth the maximum harmonic currents outgoing from a high-voltage or especially high-voltage receiving
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.
• Maximum values of outgoing harmonic currents per 1 kW contract power
Received
5th
power voltage
6.6 kV 3.5
22 kV 1.8
33 kV 1.2
 Application of the specific consumer guidelines
 Conversion factor
Classification
Three-phase bridge (capacitor
3
smoothing)
5 Self-excitation three-phase bridge
 Equivalent capacity limit
Received power Reference
voltage capacity
6.6 kV 50 kVA
22/33 kV 300 kVA
66 kV or more 2000 kVA
 Harmonic content (when the fundamental current is considered as 100%)
Reactor 5th
Used (DC side) 30
Used (AC, DC sides) 28
7th 11th
2.5 1.6 1.3
1.3 0.82 0.69
0.86 0.55 0.46
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
Circuit type
With reactor (DC side)
With reactors (AC, DC sides)
When a high power factor converter
is used
7th 11th
13 8.4
9.1 7.2
13th 17th 19th
1.0 0.9
0.53 0.47
0.35 0.32
More than upper limit
Harmonic suppression
measures necessary
13th 17th
5.0 4.7 3.2
4.1 3.2 2.4
3. PRECAUTIONS FOR USE OF THE INVERTER
23rd Over 23rd
0.76 0.70
0.39 0.36
0.26 0.24
Conversion factor Ki
K33 = 1.8
K34 = 1.4
K5 = 0
19th 23rd 25th
3.0 2.2
1.6 1.4
3.2 Power supply harmonics
1
2
3
4
5
6
7
8
9
10
83