{"id":57386,"date":"2025-12-30T05:32:29","date_gmt":"2025-12-30T10:32:29","guid":{"rendered":"http:\/\/www.kdstelectrical.com\/?p=57386"},"modified":"2025-12-30T10:06:20","modified_gmt":"2025-12-30T15:06:20","slug":"como-dimensionar-un-sistema-de-suministro-de-energia-cc-para-gabinetes-de-telecomunicaciones-exteriores","status":"publish","type":"post","link":"https:\/\/www.kdstelectrical.com\/es\/como-dimensionar-un-sistema-de-suministro-de-energia-cc-para-gabinetes-de-telecomunicaciones-exteriores\/","title":{"rendered":"C\u00f3mo dimensionar un sistema de suministro de energ\u00eda CC para gabinetes de telecomunicaciones para exteriores"},"content":{"rendered":"<h1 style=\"text-align: left;\"><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">A Step-by-Step, Easy-to-Understand Engineering Guide<\/span><\/h1>\n<hr \/>\n<h2 style=\"text-align: left;\"><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\"><strong>Introduction: Power Sizing Is Not Just a Number<\/strong><\/span><\/h2>\n<p style=\"text-align: left;\"><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif; color: #333333;\">When designing an <a style=\"color: #333333;\" href=\"http:\/\/www.kdstelectrical.com\/products\/outdoor-telecom-cabinets\/\">Outdoor Telecom Cabinet<\/a>, many problems seen in the field are not caused by poor equipment quality\u2014but by incorrect power system sizing.<\/span><\/p>\n<p style=\"text-align: left;\"><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif; color: #333333;\">Common real-world issues include:<\/span><\/p>\n<ul style=\"text-align: left;\">\n<li><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">Batteries draining much faster than expected<\/span><\/li>\n<li><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">Rectifiers running at full load all the time<\/span><\/li>\n<li><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">Cabinets overheating in summer<\/span><\/li>\n<li><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">Equipment restarting during grid fluctuations<\/span><\/li>\n<\/ul>\n<p style=\"text-align: left;\"><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">Almost all of these issues trace back to <strong>one root cause<\/strong>:<\/span><br \/>\n<span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">\ud83d\udc49 <strong>the <a href=\"http:\/\/www.kdstelectrical.com\/products\/power-supply-system\/\">DC power supply system<\/a> was not sized correctly from the beginning<\/strong>.<\/span><\/p>\n<p style=\"text-align: left;\"><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">This guide explains DC power sizing <strong>from first principles<\/strong>, using clear steps, real examples, and practical engineering logic\u2014so even readers without a power background can fully understand it.<\/span><\/p>\n<hr \/>\n<h2 style=\"text-align: left;\"><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\"><strong>1. What Does \u201cDC Power Load\u201d Really Mean?<\/strong><\/span><\/h2>\n<h3 style=\"text-align: left;\"><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\"><strong>1.1 DC Load = What the Telecom Equipment Actually Consumes<\/strong><\/span><\/h3>\n<p style=\"text-align: left;\"><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">In an outdoor telecom base station, <strong>DC load only refers to equipment powered by -48V DC<\/strong>, such as:<\/span><\/p>\n<ul style=\"text-align: left;\">\n<li><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">Baseband units (BBU)<\/span><\/li>\n<li><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">Radio units (RRU)<\/span><\/li>\n<li><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">Transmission equipment<\/span><\/li>\n<li><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">Network switches<\/span><\/li>\n<li><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">Monitoring controllers<\/span><\/li>\n<\/ul>\n<p style=\"text-align: left;\"><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">\u2757 <strong>Important clarification<\/strong><\/span><br \/>\n<span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">Cooling systems (air conditioners, fans, heaters) are usually powered by <strong>AC<\/strong>, so <strong>they must NOT be included<\/strong> in DC load calculations.<\/span><\/p>\n<hr \/>\n<h3 style=\"text-align: left;\"><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\"><strong>1.2 Why Nameplate Power Is Not Enough<\/strong><\/span><\/h3>\n<p style=\"text-align: left;\"><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">Equipment nameplates often show <strong>maximum rated power<\/strong>, but real operation is different.<\/span><\/p>\n<p style=\"text-align: left;\"><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">Example:<\/span><\/p>\n<ul style=\"text-align: left;\">\n<li><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">A radio unit rated at <strong>800 W<\/strong><\/span><\/li>\n<li><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">Typical real consumption: <strong>550\u2013650 W<\/strong><\/span><\/li>\n<\/ul>\n<p style=\"text-align: left;\"><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">Best practice:<\/span><\/p>\n<ul style=\"text-align: left;\">\n<li><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">Use <strong>measured or vendor-recommended \u201ctypical load\u201d<\/strong><\/span><\/li>\n<li><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">Add engineering margin later<\/span><\/li>\n<\/ul>\n<hr \/>\n<h3 style=\"text-align: left;\"><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\"><strong>1.3 Typical Outdoor Telecom DC Loads (Reference Table)<\/strong><\/span><\/h3>\n<table class=\" alignleft\">\n<thead>\n<tr>\n<th><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">Site Type<\/span><\/th>\n<th><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">Typical DC Load<\/span><\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">Small cell \/ micro site<\/span><\/td>\n<td><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">800\u20131200 W<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">Standard macro site<\/span><\/td>\n<td><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">2000\u20133000 W<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">High-capacity macro<\/span><\/td>\n<td><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">4000\u20136000 W<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p style=\"text-align: left;\"><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">\ud83d\udc49 If you are unsure, <strong>slightly underestimate now and add margin later<\/strong>\u2014this keeps calculations clean and safe.<\/span><\/p>\n<hr \/>\n<h2 style=\"text-align: left;\"><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\"><strong>2. Why Load Margin Is Mandatory (And How Much Is Enough)<\/strong><\/span><\/h2>\n<h3 style=\"text-align: left;\"><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\"><strong>2.1 Why Telecom Sites Always Grow<\/strong><\/span><\/h3>\n<p style=\"text-align: left;\"><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">Outdoor telecom sites almost never stay the same:<\/span><\/p>\n<ul style=\"text-align: left;\">\n<li><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">More carriers added<\/span><\/li>\n<li><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">New frequency bands<\/span><\/li>\n<li><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">Equipment upgrades (4G \u2192 5G)<\/span><\/li>\n<li><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">Temporary traffic boosts<\/span><\/li>\n<\/ul>\n<p style=\"text-align: left;\"><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">If you size DC power <strong>only for today<\/strong>, it will be undersized tomorrow.<\/span><\/p>\n<hr \/>\n<h3 style=\"text-align: left;\"><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\"><strong>2.2 Recommended Load Margin<\/strong><\/span><\/h3>\n<p style=\"text-align: left;\"><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">Industry best practice:<\/span><\/p>\n<ul style=\"text-align: left;\">\n<li><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\"><strong>+20% to +30% load margin<\/strong><\/span><\/li>\n<\/ul>\n<p style=\"text-align: left;\"><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">Example:<\/span><\/p>\n<ul style=\"text-align: left;\">\n<li><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">Measured DC load: <strong>2400 W<\/strong><\/span><\/li>\n<li><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">Margin: <strong>25%<\/strong><\/span><\/li>\n<\/ul>\n<p style=\"text-align: left;\"><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">2400 \u00d7 1.25 = 3000W<\/span><\/p>\n<p style=\"text-align: left;\"><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">\ud83d\udc49 <strong>3000 W becomes the \u201cdesign load\u201d<\/strong>, not 2400 W.<\/span><\/p>\n<p style=\"text-align: left;\"><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">This single step prevents <strong>80% of future power complaints<\/strong>.<\/span><\/p>\n<hr \/>\n<h2 style=\"text-align: left;\"><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\"><strong>3. Rectifier Sizing: Think in Modules, Not Total Power<\/strong><\/span><\/h2>\n<h3 style=\"text-align: left;\"><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\"><strong>3.1 What a Rectifier Actually Does (Plain Explanation)<\/strong><\/span><\/h3>\n<p style=\"text-align: left;\"><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">A rectifier:<\/span><\/p>\n<ul style=\"text-align: left;\">\n<li><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">Converts AC power into -48V DC<\/span><\/li>\n<li><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">Supplies DC load<\/span><\/li>\n<li><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">Charges batteries at the same time<\/span><\/li>\n<\/ul>\n<p style=\"text-align: left;\"><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">Modern telecom systems use <strong>multiple small rectifier modules<\/strong>, not one large unit.<\/span><\/p>\n<p style=\"text-align: left;\"><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">Why?<\/span><\/p>\n<ul style=\"text-align: left;\">\n<li><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">Easier redundancy<\/span><\/li>\n<li><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">Higher efficiency<\/span><\/li>\n<li><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">Hot-swappable maintenance<\/span><\/li>\n<\/ul>\n<hr \/>\n<h3 style=\"text-align: left;\"><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\"><strong>3.2 Choosing Rectifier Module Size<\/strong><\/span><\/h3>\n<p style=\"text-align: left;\"><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">Most outdoor telecom cabinets use:<\/span><\/p>\n<ul style=\"text-align: left;\">\n<li><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\"><strong>1.5 kW rectifier modules<\/strong><\/span><\/li>\n<\/ul>\n<p style=\"text-align: left;\"><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">Why 1.5 kW?<\/span><\/p>\n<ul style=\"text-align: left;\">\n<li><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">Compact size<\/span><\/li>\n<li><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">Excellent efficiency range<\/span><\/li>\n<li><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">Easy N+1 configuration<\/span><\/li>\n<li><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">Widely supported globally<\/span><\/li>\n<\/ul>\n<hr \/>\n<h3 style=\"text-align: left;\"><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\"><strong>3.3 Understanding N+1 Redundancy (Simple Explanation)<\/strong><\/span><\/h3>\n<p style=\"text-align: left;\"><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">Let\u2019s say:<\/span><\/p>\n<ul style=\"text-align: left;\">\n<li><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">Design load: <strong>3000 W<\/strong><\/span><\/li>\n<li><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">Rectifier module: <strong>1500 W<\/strong><\/span><\/li>\n<\/ul>\n<p style=\"text-align: left;\"><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">Minimum needed:<\/span><\/p>\n<ul style=\"text-align: left;\">\n<li><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">2 modules = 3000 W<\/span><\/li>\n<\/ul>\n<p style=\"text-align: left;\"><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">But telecom design <strong>never stops at minimum<\/strong>.<\/span><\/p>\n<p style=\"text-align: left;\"><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">With <strong>N+1 redundancy<\/strong>:<\/span><\/p>\n<ul style=\"text-align: left;\">\n<li><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">Install <strong>3 modules<\/strong><\/span><\/li>\n<li><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">One module can fail<\/span><\/li>\n<li><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">Remaining two still supply full load<\/span><\/li>\n<\/ul>\n<p style=\"text-align: left;\"><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">\ud83d\udc49 <strong>No service interruption. No battery discharge. No alarm storm.<\/strong><\/span><\/p>\n<figure id=\"attachment_57390\" aria-describedby=\"caption-attachment-57390\" style=\"width: 2560px\" class=\"wp-caption aligncenter\"><a href=\"http:\/\/www.kdstelectrical.com\/wp-content\/uploads\/Rectifier-module-of-rectifier-power-supply-system-1-scaled.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-57390\" title=\"Rectifier module of rectifier power supply system\" src=\"http:\/\/www.kdstelectrical.com\/wp-content\/uploads\/Rectifier-module-of-rectifier-power-supply-system-1-scaled.jpg\" alt=\"Rectifier module of rectifier power supply system\" width=\"2560\" height=\"1041\" srcset=\"https:\/\/www.kdstelectrical.com\/wp-content\/uploads\/Rectifier-module-of-rectifier-power-supply-system-1-scaled.jpg 2560w, https:\/\/www.kdstelectrical.com\/wp-content\/uploads\/Rectifier-module-of-rectifier-power-supply-system-1-300x122.jpg 300w, https:\/\/www.kdstelectrical.com\/wp-content\/uploads\/Rectifier-module-of-rectifier-power-supply-system-1-1024x417.jpg 1024w, https:\/\/www.kdstelectrical.com\/wp-content\/uploads\/Rectifier-module-of-rectifier-power-supply-system-1-768x312.jpg 768w, https:\/\/www.kdstelectrical.com\/wp-content\/uploads\/Rectifier-module-of-rectifier-power-supply-system-1-1536x625.jpg 1536w, https:\/\/www.kdstelectrical.com\/wp-content\/uploads\/Rectifier-module-of-rectifier-power-supply-system-1-2048x833.jpg 2048w, https:\/\/www.kdstelectrical.com\/wp-content\/uploads\/Rectifier-module-of-rectifier-power-supply-system-1-18x7.jpg 18w, https:\/\/www.kdstelectrical.com\/wp-content\/uploads\/Rectifier-module-of-rectifier-power-supply-system-1-600x244.jpg 600w\" sizes=\"auto, (max-width: 2560px) 100vw, 2560px\" \/><\/a><figcaption id=\"caption-attachment-57390\" class=\"wp-caption-text\"><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">Rectifier module of rectifier power supply system<\/span><\/figcaption><\/figure>\n<hr \/>\n<h3 style=\"text-align: left;\"><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\"><strong>3.4 Why Rectifiers Should NOT Run at 100% Load<\/strong><\/span><\/h3>\n<p style=\"text-align: left;\"><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">Rectifiers are happiest at:<\/span><\/p>\n<ul style=\"text-align: left;\">\n<li><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\"><strong>40\u201370% load<\/strong><\/span><\/li>\n<\/ul>\n<p style=\"text-align: left;\"><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">Running at full load causes:<\/span><\/p>\n<ul style=\"text-align: left;\">\n<li><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">Higher temperature<\/span><\/li>\n<li><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">Lower efficiency<\/span><\/li>\n<li><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">Shorter lifespan<\/span><\/li>\n<\/ul>\n<p style=\"text-align: left;\"><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">N+1 design naturally keeps rectifiers in the optimal zone.<\/span><\/p>\n<hr \/>\n<h2 style=\"text-align: left;\"><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\"><strong>4. Battery Backup: What Batteries Actually Do<\/strong><\/span><\/h2>\n<h3 style=\"text-align: left;\"><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\"><strong>4.1 Batteries Are Not \u201cEmergency Power Only\u201d<\/strong><\/span><\/h3>\n<p style=\"text-align: left;\"><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">In outdoor telecom sites, batteries serve three roles:<\/span><\/p>\n<ol style=\"text-align: left;\">\n<li><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">Backup during grid failure<\/span><\/li>\n<li><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">Buffer during voltage dips<\/span><\/li>\n<li><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">Stabilization during sudden load changes<\/span><\/li>\n<\/ol>\n<p style=\"text-align: left;\"><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">This is why batteries are <strong>always connected to the DC bus<\/strong>, not switched.<\/span><\/p>\n<hr \/>\n<h3 style=\"text-align: left;\"><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\"><strong>4.2 Step-by-Step Battery Capacity Calculation<\/strong><\/span><\/h3>\n<p style=\"text-align: left;\"><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">Let\u2019s walk through a <strong>real, simple example<\/strong>.<\/span><\/p>\n<p style=\"text-align: left;\"><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\"><strong>Step 1: Known values<\/strong><\/span><\/p>\n<ul style=\"text-align: left;\">\n<li><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">Design load: <a href=\"http:\/\/www.kdstelectrical.com\/product\/48v-rectifier-power-supply-module\/\"><strong>3000 W<\/strong><\/a><\/span><\/li>\n<li><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">DC voltage: <strong>48 V<\/strong><\/span><\/li>\n<li><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">Required backup: <strong>6 hours<\/strong><\/span><\/li>\n<\/ul>\n<hr \/>\n<p style=\"text-align: left;\"><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\"><strong>Step 2: Convert power to current<\/strong><\/span><\/p>\n<p style=\"text-align: left;\"><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">[<\/span><br \/>\n<span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">3000 \u00f7 48 \u2248 62.5 A<\/span><br \/>\n<span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">]<\/span><\/p>\n<hr \/>\n<p style=\"text-align: left;\"><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\"><strong>Step 3: Basic battery capacity<\/strong><\/span><\/p>\n<p style=\"text-align: left;\"><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">[<\/span><br \/>\n<span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">62.5 \u00d7 6 = 375 Ah<\/span><br \/>\n<span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">]<\/span><\/p>\n<hr \/>\n<h3 style=\"text-align: left;\"><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\"><strong>4.3 Why This Number Is NOT Enough<\/strong><\/span><\/h3>\n<p style=\"text-align: left;\"><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">Real-world batteries face:<\/span><\/p>\n<ul style=\"text-align: left;\">\n<li><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">Aging over time<\/span><\/li>\n<li><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">Reduced capacity in cold<\/span><\/li>\n<li><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">System losses<\/span><\/li>\n<\/ul>\n<p style=\"text-align: left;\"><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">So we apply correction factors:<\/span><\/p>\n<table class=\" alignleft\">\n<thead>\n<tr>\n<th><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">Factor<\/span><\/th>\n<th><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">Typical Value<\/span><\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">Aging<\/span><\/td>\n<td><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">1.25<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">Temperature<\/span><\/td>\n<td><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">1.15<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">System loss<\/span><\/td>\n<td><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">1.05<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p style=\"text-align: left;\"><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">Final capacity:<\/span><br \/>\n<span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">375 \u00d7 1.25 \u00d7 1.15 \u2248 539 Ah<\/span><\/p>\n<p style=\"text-align: left;\"><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">\ud83d\udc49 <strong>This is the number that matters<\/strong>, not 375 Ah.<\/span><\/p>\n<hr \/>\n<p><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\"><a href=\"http:\/\/www.kdstelectrical.com\/?attachment_id=57391\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-57391 aligncenter\" title=\"What Is a Rectifier Power Supply System and Why Telecom Sites Use It\" src=\"http:\/\/www.kdstelectrical.com\/wp-content\/uploads\/mmexport1673150014510-e1767082656702.jpg\" alt=\"What Is a Rectifier Power Supply System and Why Telecom Sites Use It\" width=\"700\" height=\"636\" srcset=\"https:\/\/www.kdstelectrical.com\/wp-content\/uploads\/mmexport1673150014510-e1767082656702.jpg 958w, https:\/\/www.kdstelectrical.com\/wp-content\/uploads\/mmexport1673150014510-e1767082656702-300x272.jpg 300w, https:\/\/www.kdstelectrical.com\/wp-content\/uploads\/mmexport1673150014510-e1767082656702-768x697.jpg 768w, https:\/\/www.kdstelectrical.com\/wp-content\/uploads\/mmexport1673150014510-e1767082656702-13x12.jpg 13w, https:\/\/www.kdstelectrical.com\/wp-content\/uploads\/mmexport1673150014510-e1767082656702-600x545.jpg 600w\" sizes=\"auto, (max-width: 700px) 100vw, 700px\" \/><\/a><\/span><\/p>\n<hr \/>\n<h2 style=\"text-align: left;\"><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\"><strong>5. Choosing Battery Type (Simple Decision Logic)<\/strong><\/span><\/h2>\n<h3 style=\"text-align: left;\"><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\"><strong>5.1 When VRLA Batteries Make Sense<\/strong><\/span><\/h3>\n<p style=\"text-align: left;\"><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">VRLA batteries are suitable when:<\/span><\/p>\n<ul style=\"text-align: left;\">\n<li><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">Ambient temperature is moderate<\/span><\/li>\n<li><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">Maintenance access is easy<\/span><\/li>\n<li><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">Initial budget is tight<\/span><\/li>\n<\/ul>\n<hr \/>\n<h3 style=\"text-align: left;\"><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\"><strong>5.2 When Lithium Batteries Are Better<\/strong><\/span><\/h3>\n<p style=\"text-align: left;\"><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">Lithium batteries are ideal when:<\/span><\/p>\n<ul style=\"text-align: left;\">\n<li><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">Site is unmanned<\/span><\/li>\n<li><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">Temperature is high<\/span><\/li>\n<li><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">Long service life is required<\/span><\/li>\n<li><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">Cabinet space is limited<\/span><\/li>\n<\/ul>\n<table class=\" alignleft\">\n<thead>\n<tr>\n<th><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">Aspect<\/span><\/th>\n<th><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">VRLA<\/span><\/th>\n<th><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">Lithium<\/span><\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">Weight<\/span><\/td>\n<td><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">Heavy<\/span><\/td>\n<td><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">Light<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">Lifespan<\/span><\/td>\n<td><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">Shorter<\/span><\/td>\n<td><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">Much longer<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">Maintenance<\/span><\/td>\n<td><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">Higher<\/span><\/td>\n<td><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">Minimal<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<hr \/>\n<h2 style=\"text-align: left;\"><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\"><strong>6. Cabinet Size: Power System Determines Cabinet, Not the Other Way Around<\/strong><\/span><\/h2>\n<h3 style=\"text-align: left;\"><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\"><strong>6.1 Why Cabinet Size Is Often Chosen Wrong<\/strong><\/span><\/h3>\n<p style=\"text-align: left;\"><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">A common mistake:<\/span><\/p>\n<blockquote><p><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">\u201cWe have a <a href=\"http:\/\/www.kdstelectrical.com\/products\/\">23U cabinet<\/a>\u2014let\u2019s fit the power system inside.\u201d<\/span><\/p><\/blockquote>\n<p style=\"text-align: left;\"><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">Correct thinking:<\/span><\/p>\n<blockquote><p><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\"><strong>\u201cWhat power system do we need\u2014and which cabinet fits it?\u201d<\/strong><\/span><\/p><\/blockquote>\n<hr \/>\n<h3 style=\"text-align: left;\"><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\"><strong>6.2 Typical Cabinet vs Power Matching<\/strong><\/span><\/h3>\n<table class=\" alignleft\">\n<thead>\n<tr>\n<th><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">Cabinet<\/span><\/th>\n<th><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">Typical Power<\/span><\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\"><strong>8U Outdoor Rack Enclosure<\/strong><\/span><\/td>\n<td><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">\u2264 1.5 kW<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\"><strong>23U Outdoor Telecom Cabinet<\/strong><\/span><\/td>\n<td><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">2\u20133 kW<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\"><strong>42U Outdoor Telecom Cabinet<\/strong><\/span><\/td>\n<td><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">\u2265 4 kW<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p><span style=\"font-size: 12pt; font-weight: bold; text-align: center; font-family: arial, helvetica, sans-serif;\">7. Cooling Impact: Small Detail, Big Consequences<\/span><\/p>\n<p data-start=\"7208\" data-end=\"7266\"><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">Rectifiers convert approximately 2%\u20134% of power into heat.<\/span><\/p>\n<p data-start=\"7268\" data-end=\"7276\"><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">Example:<\/span><\/p>\n<p data-start=\"7278\" data-end=\"7305\"><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">3 kW load \u2192 90\u2013120 W heat<\/span><\/p>\n<p data-start=\"7307\" data-end=\"7317\"><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">This heat:<\/span><\/p>\n<p data-start=\"7319\" data-end=\"7406\"><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">\u2022 Raises cabinet temperature<\/span><br data-start=\"7347\" data-end=\"7350\" \/><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">\u2022 Reduces battery life<\/span><br data-start=\"7372\" data-end=\"7375\" \/><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">\u2022 Lowers rectifier efficiency<\/span><\/p>\n<p data-start=\"7408\" data-end=\"7475\"><a href=\"http:\/\/www.kdstelectrical.com\/products\/telecom-cabinet-air-conditioner\/\"><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">Cooling systems must be designed together with the DC power system.<\/span><\/a><\/p>\n<p data-start=\"7408\" data-end=\"7475\"><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\"><a href=\"http:\/\/www.kdstelectrical.com\/wp-content\/uploads\/IMG_0976-scaled-e1767089824936.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-57394 aligncenter\" title=\"How to configure air conditioning in rectifier power supply system\" src=\"http:\/\/www.kdstelectrical.com\/wp-content\/uploads\/IMG_0976-scaled-e1767089824936.jpg\" alt=\"How to configure air conditioning in rectifier power supply system\" width=\"700\" height=\"546\" srcset=\"https:\/\/www.kdstelectrical.com\/wp-content\/uploads\/IMG_0976-scaled-e1767089824936.jpg 900w, https:\/\/www.kdstelectrical.com\/wp-content\/uploads\/IMG_0976-scaled-e1767089824936-300x234.jpg 300w, https:\/\/www.kdstelectrical.com\/wp-content\/uploads\/IMG_0976-scaled-e1767089824936-768x599.jpg 768w, https:\/\/www.kdstelectrical.com\/wp-content\/uploads\/IMG_0976-scaled-e1767089824936-15x12.jpg 15w, https:\/\/www.kdstelectrical.com\/wp-content\/uploads\/IMG_0976-scaled-e1767089824936-600x468.jpg 600w\" sizes=\"auto, (max-width: 700px) 100vw, 700px\" \/><\/a><\/span><\/p>\n<hr data-start=\"7477\" data-end=\"7480\" \/>\n<h2 data-start=\"7482\" data-end=\"7524\"><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">8. Most Common DC Power Sizing Mistakes<\/span><\/h2>\n<p data-start=\"7526\" data-end=\"7688\"><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">\u2022 Ignoring future expansion<\/span><br data-start=\"7553\" data-end=\"7556\" \/><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">\u2022 No redundancy<\/span><br data-start=\"7571\" data-end=\"7574\" \/><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">\u2022 Using theoretical battery capacity<\/span><br data-start=\"7610\" data-end=\"7613\" \/><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">\u2022 Choosing cabinet before power system<\/span><br data-start=\"7651\" data-end=\"7654\" \/><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">\u2022 Forgetting temperature effects<\/span><\/p>\n<p data-start=\"7690\" data-end=\"7753\"><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">Avoiding these mistakes dramatically improves site reliability.<\/span><\/p>\n<hr data-start=\"7755\" data-end=\"7758\" \/>\n<h2 data-start=\"7760\" data-end=\"7818\"><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">Conclusion: Good DC Power Sizing Builds Stable Networks<\/span><\/h2>\n<p data-start=\"7820\" data-end=\"7894\"><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">Correct DC power sizing is not complex \u2014 but it must be done methodically.<\/span><\/p>\n<p data-start=\"7896\" data-end=\"7937\"><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">A properly sized DC power system ensures:<\/span><\/p>\n<p data-start=\"7939\" data-end=\"8045\"><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">\u2022 Stable -48V DC supply<\/span><br data-start=\"7962\" data-end=\"7965\" \/><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">\u2022 Reliable battery backup<\/span><br data-start=\"7990\" data-end=\"7993\" \/><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">\u2022 Long equipment lifespan<\/span><br data-start=\"8018\" data-end=\"8021\" \/><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">\u2022 Lower operating cost<\/span><\/p>\n<p data-start=\"8047\" data-end=\"8110\"><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">It is the foundation of every reliable Outdoor Telecom Cabinet.<\/span><\/p>\n<hr data-start=\"8112\" data-end=\"8115\" \/>\n<h2 data-start=\"8117\" data-end=\"8188\"><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">Need Help Sizing a DC Power System for Your Outdoor Telecom Cabinet?<\/span><\/h2>\n<p data-start=\"8190\" data-end=\"8224\"><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">Our engineering team can help you:<\/span><\/p>\n<p data-start=\"8226\" data-end=\"8377\"><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">\u2022 Calculate DC load and battery capacity<\/span><br data-start=\"8266\" data-end=\"8269\" \/><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">\u2022 Select rectifier configuration<\/span><br data-start=\"8301\" data-end=\"8304\" \/><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">\u2022 Choose the right cabinet size<\/span><br data-start=\"8335\" data-end=\"8338\" \/><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">\u2022 Design for IP and NEMA environments<\/span><\/p>\n<p data-start=\"8379\" data-end=\"8463\"><span style=\"font-size: 12pt; font-family: arial, helvetica, sans-serif;\">\ud83d\udc49 <a href=\"http:\/\/www.kdstelectrical.com\/products\/power-supply-system\/\"><strong data-start=\"8382\" data-end=\"8463\">Send us your site parameters and receive a tailored DC power system proposal.<\/strong><\/a><\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>A Step-by-Step, Easy-to-Understand Engineering Guide Introduction: Power Sizing Is Not [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":57399,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"default","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center 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