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Chapter 6 EMC (Electromagnetic Compatibility)
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Chapter 6 EMC (Electromagnetic Compatibility)
6-1.Definition
Electromagnetic compatibility refers to the ability that the electric equipment runs
in an electromagnetic interference environment and implements its function stably
without interferences on the electromagnetic environment.
6-2.EMC Standard
In accordance with the requirements of the Chinese national standard
GB/T12668.3, the inverter must comply with the requirements of electromagnetic
interference and anti- electromagnetic interference.
Our existing products adopt the latest international standards: IEC/EN61800-3:
2004 (Adjustable speed electrical power drive systems part 3:EMC requirements and
specific test methods),which is equivalent to the Chinese national standards
GB/T12668.3. EC/EN61800-3 assesses the inverter in terms of electromagnetic
interference and anti-electronic interference. Electromagnetic interference mainly tests
the radiation interference, conduction interference and harmonics interference on the
inverter (necessary for civil inverter)
Anti-electromagnetic interference mainly tests the conduction immunity, radiation
immunity, surge immunity, EFTB (Electrical Fast Transient Burs) immunity, ESD
immunity and power low frequency end immunity (the specific test items includes: 1.
Immunity tests of input voltage sag, interrupt and change; 2.commutation notch
immunity; 3. harmonic input immunity ; 4. input frequency change; 5. input voltage
unbalance; 6. input voltage fluctuation) . The tests shall be conducted strictly in
accordance with the above requirements of IEC/EN61800-3, and our products are
installed and used according to the guideline of the Section 7.3 and can provide good
electromagnetic compatibility in general industry environment.
6-3.EMC Directive
6-3-1.Harmonic Effect
The higher harmonics of power supply may damage the inverter. Thus, at some
places where the quality of power system is relatively poor, it is recommended to install
Содержание 60961
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