{"id":396747,"date":"2024-10-20T04:26:14","date_gmt":"2024-10-20T04:26:14","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/ieee-c57-12-56-1986-2\/"},"modified":"2024-10-26T08:13:48","modified_gmt":"2024-10-26T08:13:48","slug":"ieee-c57-12-56-1986-2","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/ieee\/ieee-c57-12-56-1986-2\/","title":{"rendered":"IEEE C57.12.56-1986"},"content":{"rendered":"

New IEEE Standard – Superseded. This IEEE Standards product is part of the C57 family on Power Distribution and Regulating Transformers. A test procedure for determining the temperature classification of ventilated dry-type power and distribution transformer insulation systems by test rather than by chemical composition is established. The intent is to provide a uniform method for providing data for selection of the temperature classification of the insulation system, for providing data that may be used as a basis for a loading guide, and for comparative evaluation of different insulation systems. Voltage-withstand endpoint criteria are related to the impulse voltage distribution within the coil or to the initial voltage-withstand of the coil. A relationship between impulse withstand of the insulation and short-term 60-Hz-withstand is identified so that 50\/60–Hz testing of model coils is possible.<\/p>\n

PDF Catalog<\/h4>\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
7<\/td>\n1. Introduction
1.1 Scope
1.2 Purpose
1.3 References <\/td>\n<\/tr>\n
8<\/td>\n1.4 Applicable Document in Preparation
2. Basic Considerations
2.1 General
2.2 Intent
2.3 Aging Factors <\/td>\n<\/tr>\n
9<\/td>\n2.4 Data Treatment
3. Test Procedures
3.1 General <\/td>\n<\/tr>\n
10<\/td>\n3.2 Test Models <\/td>\n<\/tr>\n
13<\/td>\n3.3 Screening <\/td>\n<\/tr>\n
14<\/td>\n3.4 Test Cycles
3.5 Temperature Aging <\/td>\n<\/tr>\n
15<\/td>\n3.6 Humidity Conditioning
3.7 Dielectric Tests <\/td>\n<\/tr>\n
18<\/td>\n4. Reporting <\/td>\n<\/tr>\n
19<\/td>\nAnnex A\u2014Method for Applying Thermocouples <\/td>\n<\/tr>\n
21<\/td>\nAnnex B\u2014Outline for Transformer Insulation Systems\u2014Procedure and Test Cycles <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":"

IEEE Standard Test Procedure for Thermal Evaluation of Insulation Systems for Ventilated Dry-Type Power and Distribution 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>\n1986<\/td>\n22<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":396754,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[2644],"product_tag":[],"class_list":{"0":"post-396747","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\/396747","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\/396754"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=396747"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=396747"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=396747"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}