At the very beginning of their lifecycle, during the manufacturing process, current transformers undergo several testing stages. Current transformer manufacturers have to assure the performance data of the products they deliver: The accuracy of amplitude and phase angle, the performance rating described by the accuracy limiting factor or the terminal voltage for protection type current transformers, and the instrument security factor for metering current transformers. For TPX, TPY and TPZ CTs, several additional parameters describe their transient behavior.
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Testing current transformers at manufacturers
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Testing CTsCT ManufacturerCT accuracytransient behaviorOMICRONEnglishmanufacturingAmplitudephase angleaccuracy limiting factorterminal voltageprotection type CTinstrument security factormetering CTTPXTPYTPZCT Analyzercurrent transformerCTknee-point current transformermulti-tap current transformerratio test current transformerratio error current transformeraccuracy current transformerintegrity current transformer
