Fuji Electric frenic mini series, User Manual

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App. C Japanese Guideline for Suppressing Harmonics for Customers Receiving High Voltage or Special High Voltage
A-15
App.
App.C Japanese Guideline for Suppressing Harmonics by
Customers Receiving High Voltage or Special High
Voltage
- Disclaimer: This document provides you with a translated summary of the Guideline of the Ministry of
International Trade and Industry (September 1994). It is intended to apply to the domestic market only. It is
only for reference for the foreign market. -
Agency of Natural Resource and Energy of Japan published the following two guidelines for
suppressing harmonic noise in September 1994.
(1)
Guideline for suppressing harmonics in home electric and general-purpose appliances
(2) Guideline for suppressing harmonics by customers receiving high voltage or special high voltage
Assuming that electronic devices generating high harmonics will be increasing, these guidelines are
to establish regulations for preventing high frequency noise interference on devices sharing the
power source. These guidelines should be applied to all devices that are used on the commercial
power lines and generate harmonic current. This section gives a description limited to general-
purpose inverters.
C.1
Application to general-purpose inverters
[ 1 ] Guideline for suppressing harmonics in home electric and general-purpose
appliances
This guideline directly regulates some small-scale inverters.
(1) Applicable models
The guideline is applied to all models that drive 100/200 V motors whose nominal output capacity is
3.7 (4.0) kW or less.
(2) Regulation
The guideline regulates the total harmonic amount generated by a single inverter unit.
(3) Application
The inverter industry is planning as to when the regulation should be applied.
Tentatively, the decision whether complying with the regulation or not is currently under user
charge. Understand the spirit of the regulation and use the DC reactor (option) for the manufacturer's
inverters to comply with the guideline.
[ 2 ] Guideline for suppressing harmonics by customers receiving high voltage or special
high voltage
Unlike other guidelines, this guideline is not applied to the equipment itself such as a general-
purpose inverter, but is applied to each large-scale electric power consumer for total amount of
harmonics. The consumer should calculate the harmonics generated from each piece of equipment
currently used on the power source transformed and fed from the high or special high voltage source.
(1) Scope of regulation
In principle, the guideline applies to the customers that meet the following two conditions:
- The customer receives high voltage or special high voltage.
- The "equivalent capacity" of the converter load exceeds the standard value for the receiving
voltage (50kVA at a receiving voltage of 6.6 kV).
Appendix C.2 [1] "Calculating the equivalent capacity" gives you some supplemental information
with regard to estimation for the equivalent capacity of an inverter according to the guideline.