AEMC DTR 8510 - Control Features

6 Digital Transformer Ratiometer DTR
®
Model 8510
CHAPTER 2
PRODUCT FEATURES
2.1 Description
The DigitalTransformer Ratiometer DTR
®
 Model 8510 is a lightweight,
rugged,portableinstrumentdesignedforonsitetestingofpower,potential
andcurrenttransformers.
OperationoftheDTR
®
8510isfullyautomatic.Nousercalibration,range
selection,handcrankingortediousbalancingisrequired.
During each test cycle, the DTR
®
8510 automatically checks for:
• H/Xleadreversal
• Continuityoftestedcircuits/windings(ifcongured)
• Shortcircuitconditions(highcurrent)
Upon completion of a test cycle, the DTR
®
8510 displays:
• Turns Ratio:Theratiooftheprimarytosecondaryvoltageatthe
transformerterminalsduetotestexcitation
• Excitation Current: TheRMSexcitationcurrentintheHwinding
duetotestexcitationduringnegligibleloadingoftheassociated
Xwinding
• Polarity:Indicatesthepolarity(phase)ofXrelativetoH
• Deviation: Indicatesthedeviationfromnameplateratioin%
TurnsRatio,ExcitationCurrent,PolarityandDeviationareusefulparam-
etersindiagnosingandpredictingavarietyoffaultsthatoccurinpower,
potentialandcurrenttransformers.
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