Mitsubishi Electric FR-D720-0.2K-G, Instruction Manual

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3
P
R
ECAUT
IONS FOR U
SE OF THE DRIVE UNIT
EMC and leakage currents
3.1.4 Harmonic suppression guideline in Japan
Drive units have a converter section (rectifier circuit) and generate a harmonic current.
Harmonic currents flow from the drive 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 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 drive unit 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was repealed on September 6, 2004.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 drive unit 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").
"Specific Consumer Guidlines"
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.
(1) Application for Specific Consumers Guidelines
Table 1 Maximum Values of Outgoing Harmonic Currents per 1kW Contract Power
Received Power Voltage 5th 7th 11th 13th 17th 19th 23rd Over 23rd
6.6kV 3.5 2.5 1.6 1.3 1.0 0.9 0.76 0.70
22kV 1.8 1.3 0.82 0.69 0.53 0.47 0.39 0.36
33kV 1.2 0.86 0.55 0.46 0.35 0.32 0.26 0.24
Table 2 Conversion Factors for FR-D700-G Series
Class Circuit Type Conversion Factor (Ki)
3
Three-phase bridge
(Capacitor smoothing)
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
5 Self-excitation three-phase bridge When high power factor converter is used K5 = 0
Table 3 Equivalent Capacity Limits
Received Power Voltage Reference Capacity
6.6kV 50kVA
22/33 kV 300kVA
66kV or more 2000kVA
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
More than upper limit
Harmonic suppression
measures necessary