Active power filters for use in electric power systems; active harmonic filters, namely electric filters to be used in electrical applications to reduce harmonics and increase electric power quality; electric power loss indicators; voltage compensators and electric alternating current compensators; electrical disturbance attenuators; electric condensers; voltage regulators and regulators of electric current; inverters; electric converters; main power line conditioners; transformers

'activ':1,10 'altern':38 'applic':21 'attenu':43 'compens':35,40 'condens':45 'condition':59 'convert':55 'current':39,52 'disturb':42 'electr':7,14,20,27,30,37,41,44,51,54 'filter':3,12,15 'harmon':11,24 'increas':26 'indic':33 'invert':53 'line':58 'loss':32 'main':56 'name':13 'power':2,8,28,31,57 'qualiti':29 'reduc':23 'regul':47,49 'system':9 'transform':60 'use':5,18 'voltag':34,46

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