{"id":255010,"date":"2024-10-19T16:51:16","date_gmt":"2024-10-19T16:51:16","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/bsi-pd-iec-ts-60815-42016\/"},"modified":"2024-10-25T12:17:32","modified_gmt":"2024-10-25T12:17:32","slug":"bsi-pd-iec-ts-60815-42016","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/bsi\/bsi-pd-iec-ts-60815-42016\/","title":{"rendered":"BSI PD IEC\/TS 60815-4:2016"},"content":{"rendered":"<p>This part of <span class=\"std\"> <span class=\"std-ref\">IEC&nbsp;60815<\/span> <\/span>, which is a Technical Specification, is applicable as first approach for the determination of the required d.c. Unified Specific Creepage Distance for insulators with respect to pollution. To avoid excessive over or under design, existing operation experience should be compared and eventually additional appropriate tests may be performed by agreement between supplier and customer.<\/p>\n<p>It is applicable to:<\/p>\n<ul>\n<li>\n<p>Glass and porcelain insulators;<\/p>\n<\/li>\n<li>\n<p>Composite and hybrid insulators with an HTM or non-HTM housing.<\/p>\n<\/li>\n<\/ul>\n<p>This part of <span class=\"std\"> <span class=\"std-ref\">IEC&nbsp;60815<\/span> <\/span> gives specific guidelines and principles to arrive at an informed judgement on the probable behaviour of a given insulator in certain pollution environments.<\/p>\n<p>The structure and approach of this part of <span class=\"std\"> <span class=\"std-ref\">IEC&nbsp;60815<\/span> <\/span> are similar to those explained in Part&nbsp;1, but adapted for the specific issues encountered with polluted HV d.c. insulation.<\/p>\n<p>The aim of this Technical Specification is to give the user simplified means to:<\/p>\n<ul>\n<li>\n<p>Identify issues specific to d.c. applications that can affect the choice and design process;<\/p>\n<\/li>\n<li>\n<p>Determine the equivalent d.c. Site Pollution Severity (SPS) from measurements, correcting for electrostatic effects, diameter, pollution distribution and composition;<\/p>\n<\/li>\n<li>\n<p>Determine the reference USCD for different candidate insulating solutions, taking into account materials, dimensions and risk factors;<\/p>\n<\/li>\n<li>\n<p>Evaluate the suitability of different insulator profiles;<\/p>\n<\/li>\n<li>\n<p>Discuss the appropriate methods to verify the performance of the selected insulators, if required;<\/p>\n<\/li>\n<\/ul>\n<p>This simplified process is intended to be used when comparable operational experience from existing d.c. system is incomplete or not available.<\/p>\n<p>The simplified design approach might result in a solution that exceeds the physical constraints of the project. More refined approaches for such cases, e.g. using a statistical approach, are given in the CIGRE d.c. guidelines <span class=\"xref\">[1]<\/span>. In extreme cases, e.g. for exceptionally severe site conditions, alternative solutions such as changing the line route, relocation of converter stations or using an indoor d.c. yard may need to be considered.<\/p>\n<h4>PDF Catalog<\/h4>\n<table border=\"1px\" class=\"des-table\">\n<tr>\n<th>PDF Pages<\/th>\n<th>PDF Title<\/th>\n<\/tr>\n<tr>\n<td><b>4<b><\/td>\n<td>CONTENTS  <\/td>\n<\/tr>\n<tr>\n<td><b>6<b><\/td>\n<td>FOREWORD  <\/td>\n<\/tr>\n<tr>\n<td><b>8<b><\/td>\n<td>INTRODUCTION  <\/td>\n<\/tr>\n<tr>\n<td><b>9<b><\/td>\n<td>1 Scope <br \/> 2 Normative references  <\/td>\n<\/tr>\n<tr>\n<td><b>10<b><\/td>\n<td>3 Terms, definitions and abbreviated terms <br \/> 3.1 Terms and definitions  <\/td>\n<\/tr>\n<tr>\n<td><b>11<b><\/td>\n<td>3.2 Abbreviated terms <br \/> 4 Principles <br \/> 4.1 General  <\/td>\n<\/tr>\n<tr>\n<td><b>12<b><\/td>\n<td>4.2 Overall design process <br \/> Figures  <br \/> Figure 1 \u2013 Overall design process for d.c. insulation \u2013 determination of d.c. Site Pollution Severity <br \/> Tables   <\/td>\n<\/tr>\n<tr>\n<td><b>13<b><\/td>\n<td>5 Materials <br \/> Figure 2 \u2013 Overall design process for d.c. insulation \u2013 determination of the required USCDdc for candidate insulating solutions  <\/td>\n<\/tr>\n<tr>\n<td><b>14<b><\/td>\n<td>6 Site severity determination <br \/> 6.1 Input data <br \/> 6.2 d.c. pollution accumulation correction: Kp  <\/td>\n<\/tr>\n<tr>\n<td><b>15<b><\/td>\n<td>6.3 Chemical composition of the pollution layer (Type A pollution) <br \/> 6.4 Correcting for NSDD (Type A pollution) <br \/> Table 1 \u2013 Typical ranges of Kp according to climatic conditions  <\/td>\n<\/tr>\n<tr>\n<td><b>16<b><\/td>\n<td>6.5 Correcting for CUR (Type A pollution, cap and pin insulators) <br \/> 6.6 Effect of diameter on the pollution accumulation Kd <br \/> 6.7 Correction for the number of similar insulators in parallel: Ks  <\/td>\n<\/tr>\n<tr>\n<td><b>17<b><\/td>\n<td>7 Determination of the reference d.c. site severity  <\/td>\n<\/tr>\n<tr>\n<td><b>18<b><\/td>\n<td>8 Determination of the reference d.c. USCD <br \/> Figure 3 \u2013 RUSCDdc as a function of d.c. site pollution severity  <\/td>\n<\/tr>\n<tr>\n<td><b>19<b><\/td>\n<td>9 Correction of the RUSCD for each candidate insulator <br \/> 9.1 Correction for the effect of diameter on pollution withstand performance Cd  <\/td>\n<\/tr>\n<tr>\n<td><b>20<b><\/td>\n<td>9.2 Correction for altitude Ca <br \/> 9.3 Determination of the required USCD for each candidate <br \/> Figure 4 \u2013 Correction for the effect of diameter on d.c. pollution withstand performance  <\/td>\n<\/tr>\n<tr>\n<td><b>21<b><\/td>\n<td>10 Checking the profile parameters <br \/> 10.1 General <br \/> 10.2 Alternating sheds defined by shed overhang  <\/td>\n<\/tr>\n<tr>\n<td><b>22<b><\/td>\n<td>10.3 Spacing versus shed overhang <br \/> 10.4 Minimum distance between sheds  <\/td>\n<\/tr>\n<tr>\n<td><b>23<b><\/td>\n<td>10.5 Creepage distance versus clearance  <\/td>\n<\/tr>\n<tr>\n<td><b>24<b><\/td>\n<td>10.6 Shed angle <br \/> 10.7 Creepage factor  <\/td>\n<\/tr>\n<tr>\n<td><b>25<b><\/td>\n<td>11 Design verification <br \/> 11.1 General <br \/> 11.2 Operating experience <br \/> 11.3 Laboratory testing  <\/td>\n<\/tr>\n<tr>\n<td><b>26<b><\/td>\n<td>Annex A  (informative)  Hydrophobicity transfer materials <br \/> A.1 Qualitative flashover behaviour <br \/> Figure A.1 \u2013 Dependency of specific flashover voltage over conductivity of an electrolyte (parameter: wettability of surface)  <\/td>\n<\/tr>\n<tr>\n<td><b>28<b><\/td>\n<td>Annex B  (informative)  Dependence of USCD on pollution severity <br \/> B.1 Pollution type A <br \/> Figure B.1 \u2013 d.c. overhead lines. Collected field experience on non HTM insulators (uncoated glass and porcelain insulators)  <\/td>\n<\/tr>\n<tr>\n<td><b>29<b><\/td>\n<td>Figure B.2 \u2013 d.c. overhead lines. Collected field experience on HTM insulators (composite line insulators)  <\/td>\n<\/tr>\n<tr>\n<td><b>30<b><\/td>\n<td>B.2 Pollution Type B <br \/> Figure B.3 \u2013 Composite insulators: Example of the influence of CF on USCD (laboratory tests), see CIGRE Brochure [1] for more details  <\/td>\n<\/tr>\n<tr>\n<td><b>31<b><\/td>\n<td>Bibliographic References  <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":"<p><b>Selection and dimensioning of high-voltage insulators intended for use in polluted conditions &#8211; Insulators for d.c. systems<\/b><\/p>\n<table class=\"shortdes-table\" style=\"width: 100%\" border=\"0\" cellspacing=\"0\" cellpadding=\"0\">\n<tbody>\n<tr>\n<td>Published By<\/td>\n<td>Publication Date<\/td>\n<td>Number of Pages<\/td>\n<\/tr>\n<tr>\n<td><a href=\"https:\/\/pdfstandards.shop\/product-category\/publishers\/bsi\/\"><b>BSI<\/b><\/a><\/td>\n<td>2016<\/td>\n<td>34<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":255012,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[496,2641],"product_tag":[],"class_list":{"0":"post-255010","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-29-080-10","7":"product_cat-bsi","9":"first","10":"instock","11":"sold-individually","12":"shipping-taxable","13":"purchasable","14":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product\/255010","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\/255012"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=255010"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=255010"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=255010"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}