Omron EasySpeed 3G3JE, Руководство пользователя

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Chapter 2
2-34
Design
2-2-6 Harmonics Suppression in General-purpose Inverters
(Input Current of 20 A Maximum)
When equipped with the AC Reactor specified in section 5-2-5, the 3G3JE meets the harmonic sup-
pression guideline for general-purpose inverters (inverters with an input current of 20 A maximum)
issued by the Japan Electronic Device Industrial Council (JEDIC).
2-2-7 Guideline to Reduce Harmonics Emissions in Appliances
Receiving High Voltages or Special High Voltages
The 3G3JE meets the Guideline to Reduce Harmonics Emissions in Appliances Receiving High Volt-
ages or Special High Voltages (JEITA).
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Guideline Applicability
This guideline is applicable to the following appliances.
1. Appliances receiving power from a 6.6-kV network with a total capacity exceeding 50 kVA consid-
ering the harmonics emission rate for each type of installed device emitting harmonics (called the
equivalent capacity)
2. Appliances receiving power from a 22-kV or 33-kV network with equivalent capacity exceeding
300 kVA
3. Appliances receiving power from a 66-kV or higher network with equivalent capacity exceeding
2,000 kVA
The limit for harmonic current, calculation methods for the equivalent capacity, and calculation meth-
ods for the harmonic current for appliances receiving 6.6 kV are described below.
● Limit of Harmonic Current
The allowable value for the harmonic current flowing to the network from special appliances is cal-
culated for each harmonic number by multiplying the harmonic current limit per kilowatt of con-
tracted power given in the following table by the contracted power (in kilowatts).
Limits to Harmonic Current per kW of Contracted Power
(Unit: mA/kW)
Received
voltage (kV) 5th 7th 11th 13th 17th 19th 23rd Higher
than 23rd
6.6 3.5 2.5 1.6 1.3 1.0 0.90 0.76 0.70