{"id":360185,"date":"2024-10-20T01:29:38","date_gmt":"2024-10-20T01:29:38","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/bsi-pd-iso-iec-ts-291252017a12020\/"},"modified":"2024-10-26T02:15:09","modified_gmt":"2024-10-26T02:15:09","slug":"bsi-pd-iso-iec-ts-291252017a12020","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/bsi\/bsi-pd-iso-iec-ts-291252017a12020\/","title":{"rendered":"BSI PD ISO\/IEC TS 29125:2017+A1:2020"},"content":{"rendered":"<p>This document<\/p>\n<ol style=\"list-style-type:lower-alpha\">\n<li>\n<p>addresses the support of safety extra low voltage (SELV) and limited power source (LPS) applications that provide remote power over:<\/p>\n<ul>\n<li>\n<p>4-pair balanced cabling in accordance with the reference implementations of ISO\/IEC 11801 series standards using currents per conductor of up to 500 mA;<\/p>\n<\/li>\n<li>\n<p>1-pair balanced cabling using currents per conductor of up to 1 000 mA;<\/p>\n<\/li>\n<\/ul>\n<p>and targets the support of applications that provide remote power over balanced cabling to terminal equipment,<\/p>\n<ol style=\"list-style-type:lower-alpha\">\n<li>\n<p>covers the transmission and electrical p arameters needed to support r emote power o ver balanced cabling,<\/p>\n<\/li>\n<li>\n<p>covers various installation scenarios and how these may impact the capability of balanced cabling to support remote powering,<\/p>\n<\/li>\n<li>\n<p>specifies design and configuration of cabling as specified in ISO\/IEC 11801-1.<\/p>\n<\/li>\n<\/ol>\n<\/li>\n<\/ol>\n<blockquote>\n<p>NOTE SELV requirements specify a maximum voltage of 60 V DC and LPS is understood in the applications referenced to be up to 100 W supplied within 4-pair cabling.<\/p>\n<\/blockquote>\n<p>This document includes a mathematical model to predict the behaviour of different bundle sizes, various cabling constructions, and installation conditions for different current capacities.<\/p>\n<p>Safety (e.g. electrical safety and protection and fire) and electromagnetic compatibility (EMC) requirements are outside the scope of this document, and are covered by other standards and regulations. However, information given by this document can be of assistance.<\/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>2<b><\/td>\n<td>undefined  <\/td>\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 <br \/> 3 Terms, definitions and abbreviated terms <br \/> 3.1 Terms and definitions  <\/td>\n<\/tr>\n<tr>\n<td><b>10<b><\/td>\n<td>3.2 Abbreviated terms <br \/> 4 Conformance  <\/td>\n<\/tr>\n<tr>\n<td><b>11<b><\/td>\n<td>5 Cabling selection and performance <br \/> 6 Installation conditions <br \/> 6.1 General <br \/> 6.2 Ambient temperature <br \/> 6.3 Temperature rise and current capacity  <\/td>\n<\/tr>\n<tr>\n<td><b>12<b><\/td>\n<td>Tables <br \/> Table 1 \u2013 Maximum current per conductor versus temperature rise in a 37-cable bundlein air and conduit (all 4 pairs energized)  <\/td>\n<\/tr>\n<tr>\n<td><b>13<b><\/td>\n<td>6.4 Factors affecting temperature increase <br \/> 6.4.1 General <br \/> 6.4.2 Installation near equipment <br \/> 6.4.3 Cable count within a bundle <br \/> Table 2 \u2013 Calculated worst case current per conductor versus temperature rise in a bundle of 37 4-pair cables (all pairs energized)  <\/td>\n<\/tr>\n<tr>\n<td><b>14<b><\/td>\n<td>Blank Page  <\/td>\n<\/tr>\n<tr>\n<td><b>15<b><\/td>\n<td>Blank Page  <\/td>\n<\/tr>\n<tr>\n<td><b>16<b><\/td>\n<td>6.4.4 Reducing temperature increase <br \/> Table 3 \u2013 Temperature rise versus cable bundle size (500 mA per conductor)  <\/td>\n<\/tr>\n<tr>\n<td><b>17<b><\/td>\n<td>6.4.5 Cable bundle suspended in air <br \/> Table 4 \u2013 Temperature rise for a type of cable versus the numberof energized pairs in a 37-cable bundle (500 mA per conductor)  <\/td>\n<\/tr>\n<tr>\n<td><b>18<b><\/td>\n<td>Blank Page  <\/td>\n<\/tr>\n<tr>\n<td><b>19<b><\/td>\n<td>Blank Page  <\/td>\n<\/tr>\n<tr>\n<td><b>20<b><\/td>\n<td>6.4.6 Administration <br \/> 7 Remote power delivery over balanced cabling <br \/> Figures <br \/> Figure 1 \u2013 Examples of end point powering systems using signal pairs (top) and spare pairs (bottom)  <\/td>\n<\/tr>\n<tr>\n<td><b>21<b><\/td>\n<td>8 Connecting hardware <br \/> Figure 2 \u2013 Examples of mid-span powering systems  <\/td>\n<\/tr>\n<tr>\n<td><b>23<b><\/td>\n<td>Annex A  (informative)  Mitigation considerations for installed cabling <br \/> A.1 General <br \/> A.2 Minimum cabling class <br \/> A.3 Bundle size and location <br \/> A.4 Mitigation options  <\/td>\n<\/tr>\n<tr>\n<td><b>24<b><\/td>\n<td>Annex B  (informative)  Modelling temperature rise for cable types,  bundle sizes and installation conditions <br \/> B.1 Model basics <br \/> B.2 Power dissipated (P) <br \/> Figure B.1 \u2013 Temperature rise profile  <\/td>\n<\/tr>\n<tr>\n<td><b>25<b><\/td>\n<td>B.3 Temperature difference from ambient temperature to bundle surface (\u2206Tu) <br \/> B.3.1 Model equations <br \/> B.3.2 Typical values for constant (u <br \/> B.4 Temperature difference from bundle surface to bundle centre (\u2206Tth) <br \/> B.4.1 Model equations <br \/> B.4.2 Typical values for constant (th  <\/td>\n<\/tr>\n<tr>\n<td><b>26<b><\/td>\n<td>B.5 Temperature variation within the bundle (\u2206T(x)) <br \/> B.6 Alternative presentation of the model <br \/> B.7 Adaptation model used to derive temperature rise vs. cables in a bundle  <\/td>\n<\/tr>\n<tr>\n<td><b>27<b><\/td>\n<td>B.8 Calculations <br \/> B.9 Example  <\/td>\n<\/tr>\n<tr>\n<td><b>28<b><\/td>\n<td>B.10 Coefficients for air and conduit <br \/> Table B.1 \u2013 Bundling coefficients for different types of cables and cords (all 4 pairs energized)  <\/td>\n<\/tr>\n<tr>\n<td><b>29<b><\/td>\n<td>Annex C  (informative)  Transmission parameters related to remote powering <br \/> C.1 DC loop resistance <br \/> C.2 DC resistance unbalance (within pair) <br \/> Table C.1 \u2013 Maximum DC loop resistance of channels  <\/td>\n<\/tr>\n<tr>\n<td><b>30<b><\/td>\n<td>C.3 DC resistance unbalance (pair to pair) <br \/> Table C.2 \u2013 DC resistance unbalance of cables, connecting hardware and channels  <\/td>\n<\/tr>\n<tr>\n<td><b>31<b><\/td>\n<td>Table C.3 \u2013 DC resistance unbalance (pair to pair)  <\/td>\n<\/tr>\n<tr>\n<td><b>32<b><\/td>\n<td>Annex D  (informative)  Illustrations of heating of various bundle sizes and configurations <br \/> D.1 Limiting cable bundle size <br \/> Figure D.1 \u2013 91-cable bundle <br \/> Figure D.2 \u2013 Three bundles of 37 cables  <\/td>\n<\/tr>\n<tr>\n<td><b>33<b><\/td>\n<td>D.2 Separating into smaller bundles <br \/> Figure D.3 \u2013 Three bundles of 37 cables with separation  <\/td>\n<\/tr>\n<tr>\n<td><b>34<b><\/td>\n<td>Annex E  (informative)  Test protocol <br \/> E.1 Background <br \/> E.2 Test set-up <br \/> Figure E.1 \u2013 37-cable bundle and temperature location  <\/td>\n<\/tr>\n<tr>\n<td><b>35<b><\/td>\n<td>Figure E.2 \u2013 &#8220;Perfect bundle&#8221; and thermocouple configuration <br \/> Figure E.3 \u2013 Conductor configuration  <\/td>\n<\/tr>\n<tr>\n<td><b>36<b><\/td>\n<td>Blank Page  <\/td>\n<\/tr>\n<tr>\n<td><b>37<b><\/td>\n<td>Blank Page  <\/td>\n<\/tr>\n<tr>\n<td><b>38<b><\/td>\n<td>Annex F  (informative)  Detailed test procedure <br \/> F.1 General <br \/> F.2 Test set-up <br \/> F.2.1 Thermocouple placement <br \/> Figure F.1 \u2013 Placement of thermocouple  <\/td>\n<\/tr>\n<tr>\n<td><b>39<b><\/td>\n<td>F.2.2 Measurement of cable bundle in air <br \/> Figure F.2 \u2013 Securing of the thermocouple  <\/td>\n<\/tr>\n<tr>\n<td><b>40<b><\/td>\n<td>F.2.3 Measurement of cable bundle in conduit <br \/> Figure F.3 \u2013 Test set-up for cable bundles in air  <\/td>\n<\/tr>\n<tr>\n<td><b>41<b><\/td>\n<td>Figure F.4 \u2013 Test set-up for cable bundles in conduit  <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":"<p><b>Information technology. Telecommunications cabling requirements for remote powering of terminal equipment<\/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>2020<\/td>\n<td>42<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":360193,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[2641],"product_tag":[],"class_list":{"0":"post-360185","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-bsi","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\/360185","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\/360193"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=360185"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=360185"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=360185"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}