Table of Contents
Foreword
1.Scope
1.1ProductsandApplicationsIncluded
1.2ProductsandApplicationsExcluded
1.3RegulatoryandOtherRequirements
2.Definitions
3.Receiving,Inspecting,Handling,andStorage
3.1Receiving
3.2Handling
3.3Storage
3.4Pre-InstallationChecks
4.Installation
4.1EnvironmentalConditions
4.2CoordinationwithOtherTrades
4.3SupportingTransformers
4.4GeneralInstallationRequirements
4.5ElectricalCircuitConnections
4.6GroundingandBonding
4.7TransformersAccessories
5.Cleaning,Testing,andCommissioning
5.1Cleaning
5.2VisualandMechanicalInspection
5.3AcceptanceTesting
5.4EnergizingTransformers
6.SiteCleanup
6.1RestoreTransformerFinish
6.2TestDataandManuals
6.3Training
6.4SparePartsandSpecialTools
7.InspectionsandMaintenance
7.1SafetyProcedures
7.2FrequencyofInspectionsandMaintenance
7.3RoutineInspections
7.4PeriodicExternalCleaning,Inspection,andMaintenance
7.5PeriodicInternalCleaning,Inspection,andMaintenance
7.6PeriodicTransformerTesting
7.7Re-energizingTransformers
7.8FinalInfraredScan
8.InspectionandRe-energizationAfterAdverseOperating
Conditions
8.1InspectionandTestingFollowingaShort-Circuit
orGround-Fault
8.2TransformerSoakedByorSubmersedUnderWater
8.3InspectionandRe-energizingTransformerSprayed
orSplashedwithCleanWater
9.DryingTransformers
9.1General
9.2DryingbyInternalHeat
9.3DryingbyExternalHeat
9.4DryingbyInternalandExternalHeat
9.5DeterminingDryingTime
10.InspectionsandMaintenance
10.1General
10.2ContactResistanceTest
10.3InsulationResistanceTest
10.4PolarizationIndex
10.5TurnsRatioTest
10.6ExcitationCurrentTest
10.7WindingResistanceTest
10.8CoreInsulationResistanceTest
10.9HighPotentialTest
10.10InfraredScan
AnnexA:TransformerTroubleshootingGuide
TableA.1.TransformerTroubleshootingChart
AnnexB:ReferenceStandards Abstract
Specifies installation and maintenance practices for dry-type, two-winding transformers used for supplying power, heating, and lighting loads for commercial, institutional, and industrial use in non-hazardous locations, both indoors and outdoors.
