METROSIL CTPU电流互感器保护.pdf

METROSILCURRENTTRANSFORMER

PROTECTIONUNITS(CTPUs)

PreventsdangerousvoltagesdevelopingduringCTopen

circuitconditions.

PreventativemeasuresarestronglyrecommendedbyIEEEinordertoprotectCTsagainstopencircuitconditions.

Thisconditioncaninadvertentlyoccurthroughroutinemaintenanceoftheburdenordamagetothecablesofthe

secondarycircuit.AMetrosilCTPUprovidespermanentprotectionagainstopencircuitswithouttheneedforuser

intervention.Itactsasapassivedevicewhiletheburdenisconnectedacrossthesecondarywinding,yetimmediately

clampsovervoltagesduringanopencircuitcondition–protectingtheCT’swindinginsulationandcorecharacteristics.

METROSILCTPUFEATURES:METROSILCTPUBENEFITS:

•Provideshighimpedanceundernormaloperation•CompliancewithIEEEC57.13section6.7.1

•Deliverslowimpedanceduringopencircuit•ProtectsCTfrominsulationdamage

•Availableinbothsingleandthreepolevarieties•PreventschangestoCT’scorecharacteristics

•EveryCTPUtestedinanopencircuitcondition•Maintainscharacteristicsoverextendedheatcycles

•Voltagefreeanaloguealarmcontacts•Doesnotcreateelectromagneticinterference

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