Mitsubishi Electric FR-CC2-P, Инструкция по эксплуатации

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Power supply harmonics
PRECAUTIONS FOR USE OF THE CONVERTER UNIT
67
3
3.2.2
Harmonic Suppression Guidelines
Harmonic currents flow from the inverter or the converter unit 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Appliances and General-purpose Products" was repealed on September 6, 2004.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 factor for 6-phase rectification
• Conversion factor for 12-phase rectification
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
Classification Circuit type Conversion coefficient Ki
3
Three-phase bridge
(Capacitor smoothing) 12 Pulse converter
With reactor (DC side)
K37 = 0.8
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