IEEE C57.12.90-1987

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IEEE Standard Test Code for Liquid-Immersed Distribution, Power, and Regulating Transformers and IEEE Guide for Short-Circuit Testing of Distribution and Power Transformers

Published By	Publication Date	Number of Pages
IEEE	1987	82

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Description

New IEEE Standard – Superseded. Superseded by C57.12.90-1987. Methods for performing tests specified in IEEE Std C57.12.00-1993, IEEE Standard General Requirements for Liquid-Immersed Distribution, Power, and Regulating Transformers, and other standards applicable to liquid-immersed distribution, power, and regulating transformers are described. Instrument transformers, step-voltage and induction voltage regulators, arc furnace transformers, rectifier transformers, specialty transformers, grounding transformers, and mine transformers are excluded. This standard covers resistance measurement, polarity and phase-relation tests, ratio tests, no-load-loss and excitation current measurements, impedance and loadloss measurements, dielectric tests, temperature tests, short-circuit tests, and audible-sound-level measurements.

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PDF Pages	PDF Title
12	Scope Terminology References
13	General
14	Purpose Test Sequence Instrumentation Resistance Measurements Determination of Cold Temperature Resistance Measurement Methods
15	Connections for the Voltmeter-Ammeter Method of Resistance Measurement
16	Polarity Tests: Single-phase Transformers Windings: Subtractive Polarity Windings: Additive Polarity Leads and Polarity Marks: Subtractive Polarity Leads and Polarity Marks: Additive Polarity Polarity by Alternating-Voltage Test
17	Polarity and Phase-Relation Tests: Polyphase Transformers
18	Transformer Connections
19	7 Ratio Tests Transformer Connections
20	Tolerances for Ratio Ratio Test Methods Voltages
21	No-Load Losses and Excitation Current 8.1 General ingle-Phase Transformers Voltmeter Arranged to Read the Two Secondary Voltages Basic Circuit of Ratio Bridge
22	Instrument Transformers Instrument Transformers
23	Test Methods for Three-phase Transformers Two-Wattmeter Method
24	Excitation Current (No-Load Current Three-Wattmeter Method With Transformer Neutral Available
25	Impedance and Load Losses General
26	Impedance and Load Loss Test Procedures
27	Autotransformer Voltage Tests Using Three-Wattmeter Method
28	Voltage Tests Using Two Wattmeter Method
29	Interlacing Impedance Voltage of a Scott-Connected Transformer Calculation of Impedance Voltage and Load Loss from Test Data Zero-Phase-Sequence Impedance
30	Externally Available Neutral Externally Available Neutrals and 0″ Phase Shift Between Windings 1 and
31	Impedance Bridges Infinity General Impedance Bridge Network
32	Potentiometer-Type Network Using a Phase Shifter Potentiometer-Type Network Using a Mutual Inductor
33	Dielectric Tests 10 General
34	Switching Impulse Test Procedures
35	Lightning Impulse Test Procedures
37	Low-Frequency Tests Applied Voltage Tests
38	Induced Voltage Tests For Distribution and Class I Power Transformers Induced Voltage Test for Class I1 Power Transformers
39	10.8 Partial Discharge Measurement
40	Measurements To Be Made in Insulation Power Factor Tests Winding Temperature Correction Factor
41	10.9 Insulation Power-Factor Tests 10.10 Insulation Resistance Tests
42	11 Temperature Rise 11.1 Ambient Temperature Measurement
43	11.2 Liquid Rise Measurement 11.3 Average Winding Temperature-Rise Measurement
44	11.4 Other Temperature Measurements 11.5 Test Methods
45	11.6 Correction of Temperature Rises for Differences in Altitude Example of Loading Back Method: Single-phase Example of Loading Back Method: Three-phase
47	12.3 Test Requirements 12.4 Test Procedure
48	12.5 Proof of Satisfactory Performance
49	13 Audible Sound Tests 13.1 General 13.2 Instrumentation 13.3 Test Conditions
50	Liquid-Immersed Transformers
51	13.4 Microphone Positions 13.5 Sound-Level Measurements 13.6 Optional Frequency Analysis Measurements
52	14 Calculated Data 14.1 Reference Temperature 14.2 Losses and Excitation Current 14.3 Efficiency 14.4 Voltage Regulation of a Constant-Voltage Transformer
54	Minimum Information to be Included in Certified Test Data
58	1 Scope 2 Short-circuit Testing Techniques 2.1 Fault Application
59	2.2 Test Connections 2.3 Duration of Test 2.4 Number of Tests 2.5 Calibration Tests
60	Typical Test Connections for Three-phase Test
61	2.6 Voltage and Current Measurements
62	Typical Simulated Three-phase Fault with Single-phase Supply
63	Current Shunts to Oscillographic Recording Devices
64	3 Failure Detection Techniques 3.1 Voltage and Current Waveshapes Oscillograph Record of Fault Current Distortion
65	3.2 Leakage Impedance 3.3 Excitation Current 3.4 Low-Voltage Impulse (LVI) Testing Differential Test Circuits Single-phase Transformer Test Circuits
66	Effect of Varying Rise Time on Output Waveforms Effect of Varying Pulse Width
67	Calibration Connection for Y Windings
68	Test Connections for Y Windings
69	3.5 Visual Inspection Test Connections for h Windings
70	Triax to Coax Connection Block Bushing Coaxial Ground Cage
71	3.6 Dielectric Tests 4 Analysis of Test Results 4.1 Terminal Measurements
72	4.2 Visual Inspection
73	Low-Voltage Impulse Changes
74	Low-Voltage Impulse Changes
75	Low-Voltage Impulse Changes
77	Low-Voltage Impulse Changes
78	Low-Voltage Impulse Changes
79	Low-Voltage Impulse Changes
80	4.3 Dielectric Tests 5 Bibliography
81	Short-circuit Test Reports

Additional information

Standard Title	IEEE Standard Test Code for Liquid-Immersed Distribution, Power, and Regulating Transformers and IEEE Guide for Short-Circuit Testing of Distribution and Power Transformers
Published Code	IEEE
Publication Date	1987
Pages Count	82

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IEEE C57.12.90-1987

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