{"id":80635,"date":"2024-10-17T18:46:24","date_gmt":"2024-10-17T18:46:24","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/ieee-c57-12-91-2001\/"},"modified":"2024-10-24T19:44:11","modified_gmt":"2024-10-24T19:44:11","slug":"ieee-c57-12-91-2001","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/ieee\/ieee-c57-12-91-2001\/","title":{"rendered":"IEEE C57.12.91 2001"},"content":{"rendered":"

Revision Standard – Inactive – Superseded. This IEEE Standards product is part of the C57 family on Power Distribution and Regulating Transformers. Methods for performing tests specified in IEEE Std C57.12.01-1989 and other referenced standards applicable to dry-type distribution and power transformers are described. This standard is intended for use as a basis for performance, safety, and the proper testing of dry-type distribution and power transformers. This standard applies to all dry-type transformers except instrument transformers, step-voltage and induction voltage regulators, arc furnace transformers, rectifier transformers, specialty transformers, and mine transformers.<\/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
PDF Pages<\/th>\nPDF Title<\/th>\n<\/tr>\n
1<\/td>\nTitle Page <\/td>\n<\/tr>\n
3<\/td>\nIntroduction
Participants <\/td>\n<\/tr>\n
5<\/td>\nCONTENTS <\/td>\n<\/tr>\n
9<\/td>\n1. Scope
1.1 Purpose
1.2 Word usage
2. References <\/td>\n<\/tr>\n
11<\/td>\n3. Definitions
4. General
4.1 Test definitions
4.2 Test requirements
4.3 Test sequence
4.4 Instrumentation <\/td>\n<\/tr>\n
12<\/td>\n5. Resistance measurements
5.1 General
5.2 Determination of cold temperature
5.3 Conversion of resistance measurements <\/td>\n<\/tr>\n
13<\/td>\n5.4 Resistance measurement methods <\/td>\n<\/tr>\n
14<\/td>\n6. Polarity and phase-relation tests <\/td>\n<\/tr>\n
15<\/td>\n6.1 Subtractive and additive polarity <\/td>\n<\/tr>\n
16<\/td>\n6.2 Polarity tests\u2014single-phase transformers <\/td>\n<\/tr>\n
17<\/td>\n6.3 Polarity and phase-relation tests\u2014polyphase transformers <\/td>\n<\/tr>\n
20<\/td>\n7. Ratio tests
7.1 General <\/td>\n<\/tr>\n
21<\/td>\n7.2 Tolerances for ratio
7.3 Ratio test methods <\/td>\n<\/tr>\n
24<\/td>\n8. No-load losses and excitation current
8.1 General
8.2 No-load loss test <\/td>\n<\/tr>\n
27<\/td>\n8.3 Waveform correction of no-load losses
8.4 Determination of excitation (no-load) current <\/td>\n<\/tr>\n
28<\/td>\n9. Load losses and impedance voltage
9.1 General
9.2 Factors affecting the values of load losses and impedance voltage <\/td>\n<\/tr>\n
29<\/td>\n9.3 Tests for measuring load losses and impedance voltage <\/td>\n<\/tr>\n
35<\/td>\n9.4 Calculation of load losses and impedance voltage from test data <\/td>\n<\/tr>\n
37<\/td>\n9.5 Zero-phase-sequence impedance <\/td>\n<\/tr>\n
40<\/td>\n10. Dielectric tests
10.1 Factory dielectric tests <\/td>\n<\/tr>\n
41<\/td>\n10.2 Dielectric tests in the field
10.3 Applied-voltage tests <\/td>\n<\/tr>\n
42<\/td>\n10.4 Induced-voltage tests <\/td>\n<\/tr>\n
43<\/td>\n10.5 Impulse tests <\/td>\n<\/tr>\n
45<\/td>\n10.6 Impulse tests on transformer neutrals <\/td>\n<\/tr>\n
46<\/td>\n10.7 Detection of failure during impulse test <\/td>\n<\/tr>\n
47<\/td>\n10.8 Insulation-power-factor tests <\/td>\n<\/tr>\n
48<\/td>\n10.9 Insulation-resistance tests <\/td>\n<\/tr>\n
49<\/td>\n10.10 Partial discharge tests
11. Temperature test
11.1 General <\/td>\n<\/tr>\n
50<\/td>\n11.2 Ambient temperature measurements
11.3 Surface temperature measurements
11.4 Cold-resistance measurements <\/td>\n<\/tr>\n
51<\/td>\n11.5 Hot-resistance measurement
11.6 Calculation of average winding temperature rise <\/td>\n<\/tr>\n
52<\/td>\n11.7 Correction factors <\/td>\n<\/tr>\n
54<\/td>\n11.8 Temperature rise test loading methods <\/td>\n<\/tr>\n
60<\/td>\n12. Short-circuit tests
12.1 Scope
12.2 Short-circuit testing techniques <\/td>\n<\/tr>\n
66<\/td>\n12.3 Test requirements
12.4 Test procedure <\/td>\n<\/tr>\n
70<\/td>\n12.5 Failure detection techniques <\/td>\n<\/tr>\n
71<\/td>\n12.6 Analysis of test results and visual inspection <\/td>\n<\/tr>\n
74<\/td>\n12.7 Proof of satisfactory performance <\/td>\n<\/tr>\n
75<\/td>\n12.8 Required information for transformer short-circuit test reports
13. Audible sound-level measurements
13.1 General
13.2 Instrumentation <\/td>\n<\/tr>\n
76<\/td>\n13.3 Test conditions <\/td>\n<\/tr>\n
77<\/td>\n13.4 Microphone positions
13.5 Sound level measurements <\/td>\n<\/tr>\n
78<\/td>\n13.6 Optional-frequency analysis measurements <\/td>\n<\/tr>\n
79<\/td>\n14. Mechanical design tests
14.1 Components involved in lifting or moving
14.2 Tests of sealed dry-type transformers <\/td>\n<\/tr>\n
80<\/td>\n15. Calculated data
15.1 Reference temperature
15.2 Total losses
15.3 Efficiency
15.4 Voltage regulation <\/td>\n<\/tr>\n
81<\/td>\n16. Minimum information to be included in certified test data
16.1 Order data <\/td>\n<\/tr>\n
82<\/td>\n16.2 Rating data
16.3 Test data
16.4 Calculated data
16.5 Certification statement and approval <\/td>\n<\/tr>\n
83<\/td>\nAnnex A\u2014Bibliography <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":"

IEEE Standard Test Code for Dry-Type 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>\n2001<\/td>\n83<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":80636,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[2644],"product_tag":[],"class_list":{"0":"post-80635","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\/80635","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\/80636"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=80635"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=80635"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=80635"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}