Home>NEMA TP 2:2005

NEMA TP 2:2005

NEMA TP 2:2005 Standard Test Method For Measuring The Energy Consumption Of Distribution Transformers Describes single-phase dry-type and liquid-immersed distribution transformers at 60 Hz for the North American system (transformers for transferring electrical energy from a primary distribution circui

More details

Download

PDF AVAILABLE FORMATS IMMEDIATE DOWNLOAD
$44.75 tax incl.

$101.70 tax incl.

(price reduced by 56 %)

1000 items in stock

Table of Contents

Foreword
Section1-GENERAL
1.1Scope
1.2ReferencedStandards
1.3Definitions
Section2-ACCURACYREQUIREMENTS
2.1GeneralConsiderations
Section3-RESISTANCEMEASUREMENTS
3.1GeneralConsiderations
3.2TemperatureDeterminationofwindingsand
Pre-Conditions
3.2.1Liquid-ImmersedDistributionTransformers
3.3ResistanceMeasurementMethods
3.3.1ResistanceBridgeMethods
3.3.2Voltmeter-AmmeterMethod
3.3.3ResistanceMeters
3.4PrecautionsinMeasuringWindingResistance
3.4.1Requiredactions
3.4.2GuidelinefortheTimeConstant
3.5ConversationofResistanceMeasurements
Section4-LOSSMEASUREMENT
4.1GeneralConsiderations
4.2MeasurementofPowerLosses
4.2.1No-LoadLoss
4.2.2LoadLoss
4.3TestSets
4.3.1Single-PhaseTestSets
4.3.2Three-PhaseTestSets
4.3.3TestofThree-PhaseTransformerwith
Single-PhaseVoltage
4.3.4TestSetNeutrals
4.4No-LoadLosses:MeasurementandCalculations
4.4.1GeneralConsiderations
4.4.2No-LoadLossTest
4.4.3Corrections
4.5LoadLosses:MeasurementandCalculations
4.5.1GeneralConsiderations
4.5.2TestsforMeasuringLoadLosses
4.5.3Corrections
Section5-DETERMININGTHEEFFICIENCYVALUEOF
THETRANSFORMER
5.1OutputLoadingLevelAdjustment
5.2TotalLossPowerCalculation
5.3EnergyEfficiencyCalculation
5.4SignificantFiguresinPowerLossandEfficiencyData
Section6-TESTEQUIPMENTCALIBRATIONANDCERTIFICATION
6.1TestEquipment
6.2CalibrationandCertification
Section7-MANUFACTURER'SDETERMINATIONOFEFFICIENCY
fordistributiontransformers
7.1MethodsUsedtoDetermineEfficiency
7.1.1GeneralRequirements
7.1.2AlternativeEfficiencyDeterminationMethod
7.1.3SubstantiationofanAlternativeEfficiency
DeterminationMethod
7.1.4SubsequentVerificationofanAEDM
7.2AdditionalTestingRequirements
7.2.1SelectionofBasicModesforTestingifan
AEDMistobeApplied
7.2.2SelectionofUnitsforTestingWithinaBasic
Model

Abstract

Describes single-phase dry-type and liquid-immersed distribution transformers at 60 Hz for the North American system (transformers for transferring electrical energy from a primary distribution circuit to a secondary distribution circuit or within a secondary distribution.

Contact us