{"id":80623,"date":"2024-10-17T18:46:15","date_gmt":"2024-10-17T18:46:15","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/ieee-c57-12-90-1988\/"},"modified":"2024-10-24T19:44:08","modified_gmt":"2024-10-24T19:44:08","slug":"ieee-c57-12-90-1988","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/ieee\/ieee-c57-12-90-1988\/","title":{"rendered":"IEEE C57.12.90 1988"},"content":{"rendered":"

New IEEE Standard – Inactive – Superseded. Superseded by C57.12.90-1987.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.<\/p>\n

PDF Catalog<\/h4>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
PDF Pages<\/th>\nPDF Title<\/th>\n<\/tr>\n
12<\/td>\nScope
Terminology
References <\/td>\n<\/tr>\n
13<\/td>\nGeneral <\/td>\n<\/tr>\n
14<\/td>\nPurpose
Test Sequence
Instrumentation
Resistance Measurements
Determination of Cold Temperature
Resistance Measurement Methods <\/td>\n<\/tr>\n
15<\/td>\nConnections for the Voltmeter-Ammeter Method of Resistance Measurement <\/td>\n<\/tr>\n
16<\/td>\nPolarity 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 <\/td>\n<\/tr>\n
17<\/td>\nPolarity and Phase-Relation Tests: Polyphase Transformers <\/td>\n<\/tr>\n
18<\/td>\nTransformer Connections <\/td>\n<\/tr>\n
19<\/td>\n7 Ratio Tests
Transformer Connections <\/td>\n<\/tr>\n
20<\/td>\nTolerances for Ratio
Ratio Test Methods
Voltages <\/td>\n<\/tr>\n
21<\/td>\nNo-Load Losses and Excitation Current
8.1 General
ingle-Phase Transformers
Voltmeter Arranged to Read the Two Secondary Voltages
Basic Circuit of Ratio Bridge <\/td>\n<\/tr>\n
22<\/td>\nInstrument Transformers
Instrument Transformers <\/td>\n<\/tr>\n
23<\/td>\nTest Methods for Three-phase Transformers
Two-Wattmeter Method <\/td>\n<\/tr>\n
24<\/td>\nExcitation Current (No-Load Current
Three-Wattmeter Method With Transformer Neutral Available <\/td>\n<\/tr>\n
25<\/td>\nImpedance and Load Losses
General <\/td>\n<\/tr>\n
26<\/td>\nImpedance and Load Loss Test Procedures <\/td>\n<\/tr>\n
27<\/td>\nAutotransformer
Voltage Tests Using Three-Wattmeter Method <\/td>\n<\/tr>\n
28<\/td>\nVoltage Tests Using Two Wattmeter Method <\/td>\n<\/tr>\n
29<\/td>\nInterlacing Impedance Voltage of a Scott-Connected Transformer
Calculation of Impedance Voltage and Load Loss from Test Data
Zero-Phase-Sequence Impedance <\/td>\n<\/tr>\n
30<\/td>\nExternally Available Neutral
Externally Available Neutrals and 0″ Phase Shift Between Windings 1 and <\/td>\n<\/tr>\n
31<\/td>\nImpedance Bridges
Infinity
General Impedance Bridge Network <\/td>\n<\/tr>\n
32<\/td>\nPotentiometer-Type Network Using a Phase Shifter
Potentiometer-Type Network Using a Mutual Inductor <\/td>\n<\/tr>\n
33<\/td>\nDielectric Tests
10
General <\/td>\n<\/tr>\n
34<\/td>\nSwitching Impulse Test Procedures <\/td>\n<\/tr>\n
35<\/td>\nLightning Impulse Test Procedures <\/td>\n<\/tr>\n
37<\/td>\nLow-Frequency Tests
Applied Voltage Tests <\/td>\n<\/tr>\n
38<\/td>\nInduced Voltage Tests For Distribution and Class I Power Transformers
Induced Voltage Test for Class I1 Power Transformers <\/td>\n<\/tr>\n
39<\/td>\n10.8 Partial Discharge Measurement <\/td>\n<\/tr>\n
40<\/td>\nMeasurements To Be Made in Insulation Power Factor Tests
Winding Temperature Correction Factor <\/td>\n<\/tr>\n
41<\/td>\n10.9 Insulation Power-Factor Tests
10.10 Insulation Resistance Tests <\/td>\n<\/tr>\n
42<\/td>\n11 Temperature Rise
11.1 Ambient Temperature Measurement <\/td>\n<\/tr>\n
43<\/td>\n11.2 Liquid Rise Measurement
11.3 Average Winding Temperature-Rise Measurement <\/td>\n<\/tr>\n
44<\/td>\n11.4 Other Temperature Measurements
11.5 Test Methods <\/td>\n<\/tr>\n
45<\/td>\n11.6 Correction of Temperature Rises for Differences in Altitude
Example of Loading Back Method: Single-phase
Example of Loading Back Method: Three-phase <\/td>\n<\/tr>\n
47<\/td>\n12.3 Test Requirements
12.4 Test Procedure <\/td>\n<\/tr>\n
48<\/td>\n12.5 Proof of Satisfactory Performance <\/td>\n<\/tr>\n
49<\/td>\n13 Audible Sound Tests
13.1 General
13.2 Instrumentation
13.3 Test Conditions <\/td>\n<\/tr>\n
50<\/td>\nLiquid-Immersed Transformers <\/td>\n<\/tr>\n
51<\/td>\n13.4 Microphone Positions
13.5 Sound-Level Measurements
13.6 Optional Frequency Analysis Measurements <\/td>\n<\/tr>\n
52<\/td>\n14 Calculated Data
14.1 Reference Temperature
14.2 Losses and Excitation Current
14.3 Efficiency
14.4 Voltage Regulation of a Constant-Voltage Transformer <\/td>\n<\/tr>\n
54<\/td>\nMinimum Information to be Included in Certified Test Data <\/td>\n<\/tr>\n
58<\/td>\n1 Scope
2 Short-circuit Testing Techniques
2.1 Fault Application <\/td>\n<\/tr>\n
59<\/td>\n2.2 Test Connections
2.3 Duration of Test
2.4 Number of Tests
2.5 Calibration Tests <\/td>\n<\/tr>\n
60<\/td>\nTypical Test Connections for Three-phase Test <\/td>\n<\/tr>\n
61<\/td>\n2.6 Voltage and Current Measurements <\/td>\n<\/tr>\n
62<\/td>\nTypical Simulated Three-phase Fault with Single-phase Supply <\/td>\n<\/tr>\n
63<\/td>\nCurrent Shunts to Oscillographic Recording Devices <\/td>\n<\/tr>\n
64<\/td>\n3 Failure Detection Techniques
3.1 Voltage and Current Waveshapes
Oscillograph Record of Fault Current Distortion <\/td>\n<\/tr>\n
65<\/td>\n3.2 Leakage Impedance
3.3 Excitation Current
3.4 Low-Voltage Impulse (LVI) Testing
Differential Test Circuits
Single-phase Transformer Test Circuits <\/td>\n<\/tr>\n
66<\/td>\nEffect of Varying Rise Time on Output Waveforms
Effect of Varying Pulse Width <\/td>\n<\/tr>\n
67<\/td>\nCalibration Connection for Y Windings <\/td>\n<\/tr>\n
68<\/td>\nTest Connections for Y Windings <\/td>\n<\/tr>\n
69<\/td>\n3.5 Visual Inspection
Test Connections for h Windings <\/td>\n<\/tr>\n
70<\/td>\nTriax to Coax Connection Block
Bushing Coaxial Ground Cage <\/td>\n<\/tr>\n
71<\/td>\n3.6 Dielectric Tests
4 Analysis of Test Results
4.1 Terminal Measurements <\/td>\n<\/tr>\n
72<\/td>\n4.2 Visual Inspection <\/td>\n<\/tr>\n
73<\/td>\nLow-Voltage Impulse Changes <\/td>\n<\/tr>\n
74<\/td>\nLow-Voltage Impulse Changes <\/td>\n<\/tr>\n
75<\/td>\nLow-Voltage Impulse Changes <\/td>\n<\/tr>\n
77<\/td>\nLow-Voltage Impulse Changes <\/td>\n<\/tr>\n
78<\/td>\nLow-Voltage Impulse Changes <\/td>\n<\/tr>\n
79<\/td>\nLow-Voltage Impulse Changes <\/td>\n<\/tr>\n
80<\/td>\n4.3 Dielectric Tests
5 Bibliography <\/td>\n<\/tr>\n
81<\/td>\nShort-circuit Test Reports <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":"

IEEE Standard Test Code for Liquid-Immersed Distribution, Power, and Regulating Transformers and IEEE Guide for Short-Circuit Testing of Distribution and Power Transformers<\/b><\/p>\n\n\n\n\n
Published By<\/td>\nPublication Date<\/td>\nNumber of Pages<\/td>\n<\/tr>\n
IEEE<\/b><\/a><\/td>\n1988<\/td>\n82<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":80624,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[2644],"product_tag":[],"class_list":{"0":"post-80623","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-ieee","8":"first","9":"instock","10":"sold-individually","11":"shipping-taxable","12":"purchasable","13":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product\/80623","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media\/80624"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=80623"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=80623"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=80623"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}