This document is posted to help you gain knowledge. Please leave a comment to let me know what you think about it! Share it to your friends and learn new things together.
Transcript
THE CONDITION OF CAPACITOR VOLTAGE THE CONDITION OF CAPACITOR VOLTAGE TRANSFORMER USING TAN DELTA TRANSFORMER USING TAN DELTA
Measurement Method :Measurement Method :Ungrounded Specimen Test (UST)Ungrounded Specimen Test (UST)Grounded Specimen Test (GST)Grounded Specimen Test (GST)Grounded Specimen Test using guard Grounded Specimen Test using guard connection (connection (GSTgGSTg))
TAN DELTA MEASUREMENT TAN DELTA MEASUREMENT ANALYSISANALYSIS
Based on Interpretation stated that :Based on Interpretation stated that :High of Power Factor Values more than 1%, but High of Power Factor Values more than 1%, but Capacitance values still covered in its range, Capacitance values still covered in its range, suggested to Retest in the next 6 month to get suggested to Retest in the next 6 month to get the trending datathe trending dataChanges of CVT Capacitance Values from its Changes of CVT Capacitance Values from its range criteria within range criteria within --5 % to +10% suggested to 5 % to +10% suggested to be Replaced. be Replaced.
CVT monitoring using tan delta CVT monitoring using tan delta measurement is useful in keep sustainability measurement is useful in keep sustainability and reliability of power system network.and reliability of power system network.Failure of CVT Can be effected due to Failure of CVT Can be effected due to Dielectric Insulation FailureDielectric Insulation FailureOperational condition of CVT can be early Operational condition of CVT can be early detected both for normal and abnormal detected both for normal and abnormal conditioncondition
It is important to test CVT Power It is important to test CVT Power Factor & Capacitances through tan Factor & Capacitances through tan delta measurement to get trendings delta measurement to get trendings analisys analisys CVT with Capacitance & tan delta CVT with Capacitance & tan delta values which out of its limit values which out of its limit suggested to be Replacedsuggested to be Replaced