{"id":399846,"date":"2024-10-20T04:45:45","date_gmt":"2024-10-20T04:45:45","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/ieee-c57-12-91-2011\/"},"modified":"2024-10-26T08:33:48","modified_gmt":"2024-10-26T08:33:48","slug":"ieee-c57-12-91-2011","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/ieee\/ieee-c57-12-91-2011\/","title":{"rendered":"IEEE C57.12.91-2011"},"content":{"rendered":"

Revision Standard – Superseded. This revision addresses substantive changes to Clause 5, 10 and 11 This revision addresses substantive changes to Clause 5, Clause 10, and Clause 11 of IEEE Std C57.12.91-2001 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

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
PDF Pages<\/th>\nPDF Title<\/th>\n<\/tr>\n
1<\/td>\nCover
\n <\/td>\n<\/tr>\n
3<\/td>\nTitle page
\n <\/td>\n<\/tr>\n
6<\/td>\nIntroduction
Notice to users
Laws and regulations
Copyrights
Updating of IEEE documents <\/td>\n<\/tr>\n
7<\/td>\nErrata
Interpretations
Patents <\/td>\n<\/tr>\n
8<\/td>\nParticipants <\/td>\n<\/tr>\n
10<\/td>\nContents <\/td>\n<\/tr>\n
13<\/td>\nImportant notice
\n
1. Overview
1.1 Scope
1.2 Purpose <\/td>\n<\/tr>\n
14<\/td>\n2. Normative references
3. Definitions
4. General
4.1 Test definitions
4.2 Test requirements
4.3 Test sequence <\/td>\n<\/tr>\n
15<\/td>\n4.4 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 Subtractive and additive polarity <\/td>\n<\/tr>\n
21<\/td>\n6.2 Polarity tests\u2014single-phase transformers <\/td>\n<\/tr>\n
23<\/td>\n6.3 Polarity and phase-relation tests\u2014polyphase transformers <\/td>\n<\/tr>\n
26<\/td>\n7. Ratio tests
7.1 General <\/td>\n<\/tr>\n
27<\/td>\n7.2 Tolerances for ratio
7.3 Ratio test methods <\/td>\n<\/tr>\n
29<\/td>\n8. No-load losses and excitation current
8.1 General <\/td>\n<\/tr>\n
30<\/td>\n8.2 No-load loss test <\/td>\n<\/tr>\n
32<\/td>\n8.3 Waveform correction of no-load losses
8.4 Determination of excitation (no-load) current <\/td>\n<\/tr>\n
33<\/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
34<\/td>\n9.3 Tests for measuring load losses and impedance voltage <\/td>\n<\/tr>\n
41<\/td>\n9.4 Calculation of load losses and impedance voltage from test data <\/td>\n<\/tr>\n
43<\/td>\n9.5 Zero-phase-sequence impedance <\/td>\n<\/tr>\n
45<\/td>\n10. Dielectric tests
10.1 Factory dielectric tests <\/td>\n<\/tr>\n
47<\/td>\n10.2 Dielectric tests in the field
10.3 Applied-voltage tests <\/td>\n<\/tr>\n
48<\/td>\n10.4 Induced-voltage tests <\/td>\n<\/tr>\n
49<\/td>\n10.5 Impulse tests <\/td>\n<\/tr>\n
52<\/td>\n10.6 Impulse tests on transformer neutrals
10.7 Detection of failure during impulse test <\/td>\n<\/tr>\n
53<\/td>\n10.8 Insulation-power-factor tests <\/td>\n<\/tr>\n
54<\/td>\n10.9 Insulation-resistance tests <\/td>\n<\/tr>\n
56<\/td>\n11. Temperature test
11.1 General
11.2 Ambient temperature measurements <\/td>\n<\/tr>\n
57<\/td>\n11.3 Surface temperature measurements
11.4 Cold-resistance measurements
11.5 Hot-resistance measurement <\/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
61<\/td>\n11.8 Temperature rise test loading methods <\/td>\n<\/tr>\n
67<\/td>\n12. Short-circuit tests
12.1 Scope
12.2 Short-circuit testing techniques <\/td>\n<\/tr>\n
73<\/td>\n12.3 Test requirements <\/td>\n<\/tr>\n
74<\/td>\n12.4 Test procedure <\/td>\n<\/tr>\n
77<\/td>\n12.5 Failure detection techniques <\/td>\n<\/tr>\n
79<\/td>\n12.6 Analysis of test results and visual inspection <\/td>\n<\/tr>\n
82<\/td>\n12.7 Proof of satisfactory performance <\/td>\n<\/tr>\n
83<\/td>\n12.8 Required information for transformer short-circuit test reports
13. Audible sound-level measurements
13.1 General <\/td>\n<\/tr>\n
84<\/td>\n13.2 Instrumentation
13.3 Test conditions <\/td>\n<\/tr>\n
85<\/td>\n13.4 Microphone positions <\/td>\n<\/tr>\n
86<\/td>\n13.5 Sound level measurements
13.6 Optional-frequency analysis measurements <\/td>\n<\/tr>\n
88<\/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
89<\/td>\n15. Calculated data
15.1 Reference temperature
15.2 Total losses
15.3 Efficiency
15.4 Voltage regulation <\/td>\n<\/tr>\n
91<\/td>\n16. Minimum information to be included in certified test data
16.1 Order data
16.2 Rating data
16.3 Test data <\/td>\n<\/tr>\n
92<\/td>\n16.4 Calculated data
16.5 Certification statement and approval <\/td>\n<\/tr>\n
93<\/td>\nAnnex A (informative) Bibliography
\n <\/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>\n2011<\/td>\n94<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":399853,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[2644],"product_tag":[],"class_list":{"0":"post-399846","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\/399846","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\/399853"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=399846"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=399846"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=399846"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}