Mitsubishi FR-A846-00023, Инструкция по эксплуатации

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Power supply harmonics
PRECAUTIONS FOR USE OF THE INVERTER
77
3
3.2.2
Harmonic suppression guidelines in Japan
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 was established to protect other consumers from these outgoing harmonic currents.
The three-phase 200 V input specifications 3.7 kW or lower were previously covered by "the Harmonic Suppression
Guidelines for Household Appliances and General-purpose Products" and other models were covered by "the 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 "the Harmonic Suppression Guidelines for Household
Appliances and General-purpose Products" in January 2004 and "the Harmonic Suppression Guideline 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Appliances and General-purpose Products" was repealed on September 6, 2004.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 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
 Application of the specific consumer guidelines
• Conversion factors
• Equivalent Capacity Limits
Received power voltage 5th 7th 11th 13th 17th 19th 23rd Over 23rd
6.6 kV 3.5 2.5 1.6 1.3 1.0 0.9 0.76 0.70
22 kV 1.8 1.3 0.82 0.69 0.53 0.47 0.39 0.36
33 kV 1.2 0.86 0.55 0.46 0.35 0.32 0.26 0.24
Classification Circuit type Conversion coefficient Ki
3
Three-phase bridge
(Capacitor smoothing)
With reactor (DC side) K33 = 1.8
With reactors (AC, DC sides) K34 = 1.4
5 Self-excitation three-phase bridge When a high power factor converter is used K5 = 0
Received power voltage Reference capacity
6.6 kV 50 kVA
22/33 kV 300 kVA
66 kV or more 2000 kVA
Install, add or renew
equipment
Calculation of equivalent
capacity total
Equivalent
capacity total
Calculation of outgoing
harmonic current
Not more than
harmonic current upper
limit?
Harmonic suppression
measures unnecessary
Harmonic suppression
measures necessary
Equal to or less
than upper limit
More than upper limit
Above reference
capacity
Equal to or less
than reference
capacity