{"id":399857,"date":"2024-10-20T04:45:50","date_gmt":"2024-10-20T04:45:50","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/ieee-pc57-12-91\/"},"modified":"2024-10-26T08:33:51","modified_gmt":"2024-10-26T08:33:51","slug":"ieee-pc57-12-91","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/ieee\/ieee-pc57-12-91\/","title":{"rendered":"IEEE PC57.12.91"},"content":{"rendered":"

Revision Standard – Active – Draft. This revision addresses substantive changes to Clause 5, Clause 1 10, and Clause 11 of IEEE Std C57.12.91-2011 to reflect current practice in the testing procedures of dry-type transformers. This revision does not address transformer requirements and specific test criteria; rather they are contained in appropriate standards such as IEEE Std C57.12.01 or in user specifications.<\/p>\n

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PDF Pages<\/th>\nPDF Title<\/th>\n<\/tr>\n
1<\/td>\nIEEE Std C57.12.91\u2122-2020 Front cover <\/td>\n<\/tr>\n
2<\/td>\nTitle page <\/td>\n<\/tr>\n
4<\/td>\nNotice and Disclaimer of Liability Concerning the Use of IEEE Standards Documents <\/td>\n<\/tr>\n
7<\/td>\nParticipants <\/td>\n<\/tr>\n
9<\/td>\nIntroduction <\/td>\n<\/tr>\n
10<\/td>\nContents <\/td>\n<\/tr>\n
12<\/td>\n1. Overview
1.1 Scope
1.2 Purpose <\/td>\n<\/tr>\n
13<\/td>\n1.3 Word usage
2. Normative references <\/td>\n<\/tr>\n
14<\/td>\n3. Definitions
4. General
4.1 Test definitions
4.2 Test requirements <\/td>\n<\/tr>\n
15<\/td>\n4.3 Test sequence
4.4 Instrumentation
5. Resistance measurements
5.1 General
5.2 Measurements <\/td>\n<\/tr>\n
16<\/td>\n5.3 Determination of cold temperature <\/td>\n<\/tr>\n
17<\/td>\n5.4 Conversion of resistance measurements
5.5 Resistance measurement methods <\/td>\n<\/tr>\n
18<\/td>\n5.6 Resistance measurement connections and reporting <\/td>\n<\/tr>\n
19<\/td>\n6. Polarity and phase-relation tests
6.1 General
6.2 Subtractive and additive polarity <\/td>\n<\/tr>\n
21<\/td>\n6.3 Polarity tests\u2014single-phase transformers <\/td>\n<\/tr>\n
22<\/td>\n6.4 Polarity and phase-relation tests\u2014polyphase transformers <\/td>\n<\/tr>\n
25<\/td>\n7. Ratio test
7.1 General <\/td>\n<\/tr>\n
26<\/td>\n7.2 Tolerances for ratio
7.3 Ratio test methods <\/td>\n<\/tr>\n
28<\/td>\n8. Excitation losses and current
8.1 General <\/td>\n<\/tr>\n
29<\/td>\n8.2 Excitation loss test <\/td>\n<\/tr>\n
31<\/td>\n8.3 Waveform correction of excitation losses
8.4 Determination of excitation current <\/td>\n<\/tr>\n
32<\/td>\n8.5 Frequency conversion of excitation losses and current
9. Load losses and impedance voltage
9.1 General
9.2 Factors affecting the values of load losses and impedance voltage <\/td>\n<\/tr>\n
33<\/td>\n9.3 Tests for measuring load losses and impedance voltage <\/td>\n<\/tr>\n
39<\/td>\n9.4 Calculation of load losses and impedance voltage from test data <\/td>\n<\/tr>\n
41<\/td>\n9.5 Zero-phase-sequence impedance <\/td>\n<\/tr>\n
43<\/td>\n10. Dielectric test
10.1 Factory dielectric tests <\/td>\n<\/tr>\n
45<\/td>\n10.2 Dielectric tests in the field
10.3 Applied voltage tests <\/td>\n<\/tr>\n
46<\/td>\n10.4 Induced voltage tests <\/td>\n<\/tr>\n
47<\/td>\n10.5 Partial discharge tests <\/td>\n<\/tr>\n
48<\/td>\n10.6 Impulse tests <\/td>\n<\/tr>\n
52<\/td>\n10.7 Impulse tests on transformer neutrals
10.8 Detection of failure during impulse tests <\/td>\n<\/tr>\n
53<\/td>\n10.9 Insulation-power-factor tests <\/td>\n<\/tr>\n
54<\/td>\n10.10 Insulation-resistance tests <\/td>\n<\/tr>\n
55<\/td>\n11. Temperature rise test
11.1 General <\/td>\n<\/tr>\n
56<\/td>\n11.2 Ambient temperature measurements
11.3 Surface temperature measurements <\/td>\n<\/tr>\n
57<\/td>\n11.4 Cold-resistance measurements
11.5 Hot-resistance measurements <\/td>\n<\/tr>\n
58<\/td>\n11.6 Calculation of average winding temperature rise <\/td>\n<\/tr>\n
59<\/td>\n11.7 Correction factors <\/td>\n<\/tr>\n
60<\/td>\n11.8 Temperature rise test loading methods <\/td>\n<\/tr>\n
66<\/td>\n12. Short-circuit tests
12.1 Scope <\/td>\n<\/tr>\n
67<\/td>\n12.2 Short-circuit testing techniques <\/td>\n<\/tr>\n
72<\/td>\n12.3 Test requirements
12.4 Test procedure <\/td>\n<\/tr>\n
76<\/td>\n12.5 Failure detection techniques <\/td>\n<\/tr>\n
77<\/td>\n12.6 Analysis of test results and visual inspection <\/td>\n<\/tr>\n
80<\/td>\n12.7 Proof of satisfactory performance <\/td>\n<\/tr>\n
81<\/td>\n12.8 Required information for transformer short-circuit test reports
13. Audible sound-level measurements
13.1 General <\/td>\n<\/tr>\n
82<\/td>\n13.2 Instrumentation <\/td>\n<\/tr>\n
83<\/td>\n13.3 Test conditions <\/td>\n<\/tr>\n
84<\/td>\n13.4 Microphone positions
13.5 Sound pressure level measurements <\/td>\n<\/tr>\n
89<\/td>\n13.6 Determination of audible sound level of a transformer
13.7 Presentation of results <\/td>\n<\/tr>\n
92<\/td>\n14. Mechanical design tests
14.1 General
14.2 Components involved in lifting or moving
14.3 Tests of sealed dry-type transformers
15. Calculated data
15.1 Reference temperature <\/td>\n<\/tr>\n
93<\/td>\n15.2 Total losses
15.3 Efficiency
15.4 Voltage regulation <\/td>\n<\/tr>\n
94<\/td>\n16. Minimum information to be included in certified test data
16.1 General
16.2 Order data <\/td>\n<\/tr>\n
95<\/td>\n16.3 Rating data
16.4 Test data
16.5 Calculated data
16.6 Certification statement and approval <\/td>\n<\/tr>\n
96<\/td>\nAnnex A (informative) Bibliography <\/td>\n<\/tr>\n
97<\/td>\nAnnex B (normative) 50\/60 Hz frequency conversion of measured performance parameters <\/td>\n<\/tr>\n
102<\/td>\nBack cover <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":"

IEEE Approved Draft 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>\n2020<\/td>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":399859,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[2644],"product_tag":[],"class_list":{"0":"post-399857","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\/399857","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\/399859"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=399857"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=399857"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=399857"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}