Table of Contents
FOREWORD
SCOPE
Section1CURRENTTRANSFORMERS
GeneralRequirements
Definitions
StandardRatings
Nameplate
PolarityMarkingofTerminals
PrimaryCurrentIdentification
TestCard
Terminals
SpaceforUserIdentificationNumber
MechanicalConstruction
Small-SizeOutdoorCurrentTransformers
125kVBILthrough200kVBIL
LargeSizeOutdoorCurrentTransformers
150kVBILthrough350kVBIL
Section2VOLTAGETRANSFORMERS
GeneralRequirements
Definitions
StandardRatings
Nameplate
PolarityMarkingofTerminals
PrimaryVoltageIdentification
TestCard
Terminals
SpaceforUserIdentificationNumber
Small-SizeOutdoorVoltageTransformers
125kVBILthrough200kVBIL
Large-SizeOutdoorVoltageTransformers
150kVBILthrough350kVBIL
APPENDIXACircleMethodforDeterminationofVoltage
TransformerAccuracy
FIGURES
1.10.3AccuracyClassLimitsforCurrentTransformers
1.2Small-SizeOutdoorCurrentTransformers125kV
BILLthrough200kVBIL
1.3Large-SizeOutdoorCurrentTransformers150kV
BILLthrough350kVBIL
1.4PrimaryTerminalDimensionsforLargeSizeOutdoor
CurrentTransformers,150kVBILthrough350kVBIL
2.10.3AccuracyClassLimitsforVoltageTransformers
2.2Small-SizeOutdoorVoltageTransformers150kV
BILLthrough200kVBIL,OneBushingType10
2.3Small-SizeOutdoorVoltageTransformers125kVBIL
through200kVBIL,TwoBushingType
2.4Large-SizeOutdoorVoltageTransformers,150kVBIL
through350kVBIL,OneBushingType
2.5Large-SizeOutdoorVoltageTransformers,150kVBIL
through350kVBIL,TwoBushingType
A-1CircleMethodforDeterminationofVoltage
TransformerAccuracy
A.2SampleofGraphPaperSpecificallyScaledfor
VoltageTransformer
TABLES
1.1StandardMeteringBurdensforCurrentTransformers
with5AmpereSecondaries
1.2StandardAccuracyClassforCurrentTransformers
2.1StandardBurdensforVoltageTransformers
2.2StandardAccuracyClassforVoltageTransformers Abstract
Covers general requirements, accuracy classifications, ratings, burdens and pertinent dimensions applicable to instrument current and voltage transformers for revenue metering rated 125 kV BIL through 350 kV BIL.
