Specifications

Chapter9EMCVFD‐G7SeriesFrequencyInverterOperationManual
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Chapter 9 EMC
9.1 Definition
EMC is that the electrical equipment is operating in the enviroment with electromagnetic
interference,doesnotinterfereelectromagneticenviromentandstablyachieveitsfunction.
9.2 EMC Standard Introduction
AccordingtotherequirementsofnationalstandardGB/T12668.3,thedriveneedtocomply
withelectromagneticinterferenceandanti‐electromagneticinterferencetworequirements.
The existing products of the company execute the latest international standards:
IEC/EN61800‐3：2004（Adjustable speed electric SVFl power drive systems‐part 3:EMC
Requirements and specific test methods) which
 is equivalent to the national standard
GB/T12668.3.
IEC/EN61800‐3inspectsthedrivefromEMIandanti‐EMItwoaspects,EMImainlyteststhe
drive'sradiation,conductedandharmonicinterferences(Correspondingthecivildrivehas
the requirement ). Anti‐EMI mainly teststhe drive's conducted immunity, radiation
immunity, surge immunity,
fast mutant burst immunity,ESD immunity and power low
frequencyendimmunity (Specific test itemsare:1. theexperiment ofinputvoltage dips,
interruptionsandchangesimmunity;2,theexperimentofcommutationnotchesimmunity;
3, the experiment of harmonic input immunity ; 4, the experiment of input frequency
change; 5, the
 experiment of input voltage unbalance; 6, the experiment of input voltage
fluctuation).
According the stringent requirements of the IEC/EN61800‐3 to test and according
instructionsshown inthe 9.3toinstall,Ourproductswillhavea goodEMCforthegeneral
industrialenvironment.
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9.3 EMC Direction