primaarmähiseta ja isolatsioonita voolutrafo, mille magnetahel on avatav (eraldatav kahte ossa) ja suletav ümber vooluga isoleeritud juhtme
current transformer without primary conductor, and primary insulation of its own, the magnetic circuit of which can be hinged open (or otherwise separated into two parts) and then closed around the insulated conductor carrying the current to be measured
