ASME PTC 19.6 2018 R2023

$98.04

ASME PTC 19.6-2018 Electrical Power Measurements

Published By	Publication Date	Number of Pages
ASME	2018	73

Guaranteed Safe Checkout

Category: ASME

If you have any questions, feel free to reach out to our online customer service team by clicking on the bottom right corner. We’re here to assist you 24/7.
Email:[email protected]

Description

This Standard provides instructions and guidance for the accurate determination of electrical power quantities that are commonly needed in support of ASME Performance Test Codes. The choice of method and instruments to be used, required calculations, and corrections to be applied in any given case depend on the requirements of the PTC referencing this Standard, considering the purpose of the measurement, uncertainty required, and nature of the circuit to be measured.

PDF Catalog

PDF Pages	PDF Title
4	CONTENTS
7	NOTICE
8	FOREWORD
9	ASME PTC COMMITTEE ROSTER
10	CORRESPONDENCE WITH THE PTC COMMITTEE
12	INTRODUCTION
14	Section 1 Object and Scope 1-1 OBJECT 1-2 SCOPE 1-3 TEST UNCERTAINTY Tables Table 1-3-1 Class Requirements for Active Power Measurement Uncertainty
15	1-4 OTHER REQUIREMENTS AND REFERENCES 1-4.1 Other Requirements 1-4.2 References
16	Section 2 Definitions and Descriptions of Terms 2-1 GENERAL 2-2 DEFINITIONS
18	2-2.1 Symbols and Subscripts Table 2-2.1-1 Symbols
19	Table 2-2.1-2 Subscripts
20	Section 3 Power System Measurement Techniques 3-1 INTRODUCTION 3-2 SINGLE-PHASE, TWO-WIRE POWER SYSTEMS 3-3 THREE-PHASE, THREE-WIRE POWER SYSTEMS Figures Figure 3-2-1 Single-Phase, Two-Wire Power Measurement
21	3-4 THREE-PHASE, FOUR-WIRE POWER SYSTEMS 3-5 CALCULATION OF PRIMARY ACTIVE AND REACTIVE POWER 3-5.1 Primary Watts
22	Figure 3-3-1 Three-Phase, Three-Wire Generators
23	3-5.2 Primary Vars Figure 3-4-1 Three-Phase, Four-Wire Wye Generator
24	3-6 POWER FACTOR 3-6.1 Three-Phase, Three-Wire Power System
25	3-6.2 Three-Phase, Four-Wire Power Systems 3-7 EXCITER POWER
26	3-7.1 Derivation From Breaker Currents 3-7.2 Derivation From Field Voltage and Current
27	3-7.3 Detailed Analysis of Exciter Load
28	3-8 AUXILIARY POWER 3-9 ELECTRIC MOTOR POWER MEASUREMENT 3-9.1 Power Meter Method
29	3-9.2 Calculated Method
31	Section 4 Power Meters 4-1 TYPES OF METERS 4-2 CATEGORIES OF INSTRUMENTATION 4-2.1 Test Instruments 4-2.2 Station Instruments 4-2.3 Performance Monitoring Instruments
32	4-2.4 Clamp-on Instruments 4-2.5 Uncalibrated Instruments 4-3 WATTMETERS 4-4 WATT-HOUR METERS
33	4-5 VARMETERS 4-6 VAR-HOUR METERS 4-7 POWER FACTOR METERS 4-8 CALIBRATION
34	4-8.1 Wattmeter and Watt-Hour Meter Calibration 4-8.2 Varmeter and Var‐Hour Meter Calibration
36	Section 5 Instrument Transformers 5-1 PURPOSE 5-2 VOLTAGE TRANSFORMERS
37	5-3 CURRENT TRANSFORMERS 5-4 INSTRUMENT TRANSFORMER CONNECTIONS 5-5 CALIBRATION REQUIREMENTS 5-5.1 VT Calibration
38	5-5.2 CT Calibration
39	5-5.3 Ratio Error Modeling of Instrument Transformers
40	5-6 CORRECTION OF VT ERRORS 5-6.1 VT Burden Measurements 5-6.2 Analytical Calculation of VT Ratio and Phase-Angle Correction Factors
42	5-7 VOLTAGE DROP CORRECTIONS FOR VT SECONDARY CIRCUITS 5-8 CORRECTION OF IRON-CORE CT ERRORS 5-8.1 Calculation of CT Phase-Angle Correction Factors
43	5-8.2 Demagnetization 5-9 CALCULATION OF PHASE-ANGLE CORRECTION FACTORS 5-10 PRECAUTIONS IN THE USE OF INSTRUMENT TRANSFORMERS 5-11 UTILIZATION OF STATION INSTRUMENT TRANSFORMERS
44	Section 6 Net Power Output 6-1 INTRODUCTION 6-2 DIRECT MEASUREMENT OF NET POWER 6-3 CALCULATION OF NET POWER 6-3.1 Power Transformer Losses
46	6-3.2 Line Losses
47	6-4 NET PLANT POWER FACTOR 6-5 POWER RELATIONSHIPS BETWEEN PRIMARY AND SECONDARY WINDINGS OF MAIN POWER TRANSFORMER
49	Section 7 Test Uncertainty 7-1 UNCERTAINTY CALCULATION REQUIREMENTS 7-1.1 Uncertainty of the Result, UR 7-1.2 Sensitivity, Θ 7-1.3 Systematic Standard Uncertainty
50	7-1.4 Random Standard Uncertainty 7-1.5 Other Considerations 7-2 POWER UNCERTAINTY CALCULATION
51	7-2.1 Systematic Uncertainty and Correlation
52	7-2.2 Random Standard Uncertainty 7-2.3 Gross Power Uncertainty 7-2.4 Corrected Gross Power Uncertainty Table 7-2.3-1 Typical Gross Power Uncertainties for Test Classes Table 7-2.4-1 Gross Power Correction Uncertainties
53	7-3 UNCERTAINTY CONSIDERATIONS
54	Table A-2-1 Sample Wattmeter Data NONMANDATORY APPENDIX A SAMPLE CALCULATION OF CLASS A GROSS GENERATOR OUTPUT DERIVED FROM THREE-PHASE SECONDARY MEASUREMENTS A-1 INTRODUCTION A-2 GENERATOR OUTPUT METERING REQUIREMENTS A-3 CORRECTIONS FOR INSTRUMENT TRANSFORMER BURDENS AND WIRING LOSSES
55	Figure A-1-1 Example Electrical Single-Line Schematic
56	Table A-3.1-1 Example VT Burden Measurement Data Table A-3.1-2 Example VT Calibration Data A-3.1 VT Burden Measurements A-3.2 VT Ratio Correction Factors
57	Table A-3.2-1 VT and CT Ratio and Phase-Angle Correction Factor Results A-3.3 VT Phase-Angle Error A-3.4 CT Ratio Correction Factors A-3.5 CT Phase-Angle Error A-3.6 Phase-Angle Correction Factors
58	Figure A-3.4-1 Sample CT Ratio Correction Factor Curve A-3.7 VT Voltage Drop Corrections
59	Figure A-3.4-2 Sample CT Phase-Angle Error Curve Table A-3.7-1 Sample VT Wiring Voltage Drop Corrections A-4 CONVERSION OF SECONDARY SIDE READINGS TO PRIMARY SIDE VALUES
60	Table A-6-1 Conversion of Secondary Side Readings to Primary Side Values A-5 POWER FACTOR CALCULATION A-6 PHASE ANGLE
61	NONMANDATORY APPENDIX B SAMPLE CORRECTION OF GROSS GENERATOR OUTPUT TO RATED CONDITIONS B-1 INTRODUCTION B-2 POWER FACTOR CORRECTION B-3 GENERATOR HYDROGEN PRESSURE CORRECTION
62	Figure B-2-1 Sample Generator Electrical Loss Curve Table B-1-1 Sample Generator Data
63	Figure B-4-1 Density of Hydrogen/Air Mixture B-4 GENERATOR HYDROGEN PURITY CORRECTION
64	B-5 CORRECTED GROSS GENERATOR OUTPUT
65	Figure C-2-1 Farber Plot NONMANDATORY APPENDIX C DETERMINING VT RATIO CORRECTION FACTOR AND PHASE-ANGLE ERROR USING THE FARBER METHOD C-1 INTRODUCTION C-2 DATA AND ANALYSIS METHODOLOGY
67	Table D-2-1 Uncertainties Associated With Quality of Burden Value NONMANDATORY APPENDIX D ESTIMATING UNCERTAINTIES OF INSTRUMENT TRANSFORMERS D-1 INTRODUCTION D-2 VOLTAGE TRANSFORMERS
68	Table D-2-2 VT Uncertainty Summary in RCF Units D-3 CURRENT TRANSFORMERS D-4 SUMMARY
69	Figure D-3-1 Typical Current Transformer Characteristics Table D-3-1 CT Uncertainty Summary in RCF Units