{"id":46426,"date":"2025-12-07T13:00:24","date_gmt":"2025-12-07T13:00:24","guid":{"rendered":"https:\/\/maritimehub.co.uk\/?page_id=46426"},"modified":"2025-12-07T13:00:24","modified_gmt":"2025-12-07T13:00:24","slug":"eto","status":"publish","type":"page","link":"https:\/\/maritimehub.co.uk\/eto\/","title":{"rendered":"eto"},"content":{"rendered":"<div class=\"mh-engine-shell\">\n<p>  <!-- LEFT COLUMN \u2013 ETO MENU --><\/p>\n<div class=\"mh-engine-nav\">\n<div class=\"mh-engine-nav-inner\">\n<div class=\"mh-engine-nav-title\">ETO Menu<\/div>\n<p class=\"mh-engine-nav-hint\">\n        Choose an ETO topic below. Each entry opens its own articles, tools and troubleshooting pages<br \/>\n        inside the ETO &amp; Electrical section.\n      <\/p>\n<hr>\n<p>      <!-- 1) Fundamentals, safety & distribution --><\/p>\n<div class=\"mh-engine-group\">\n        <button class=\"mh-engine-group-head is-active\" type=\"button\"><br \/>\n          <span class=\"mh-engine-group-index\">1<\/span><br \/>\n          <span>Fundamentals, Safety &amp; Distribution<\/span><br \/>\n        <\/button><\/p>\n<ul class=\"mh-engine-sublist\">\n<li><a href=\"#eto-fundamentals\">Electrical Principles &amp; Standards<\/a><\/li>\n<li><a href=\"#eto-safety-hv\">Safety: LOTO, Arc-Flash &amp; HV Work<\/a><\/li>\n<li><a href=\"#eto-hv-power\">HV Power (3.3\u201311 kV)<\/a><\/li>\n<li><a href=\"#eto-lv-distribution\">LV Distribution<\/a><\/li>\n<li><a href=\"#eto-switchboards-mcc\">Switchboards &amp; MCCs<\/a><\/li>\n<li><a href=\"#eto-protection-coordination\">Protection &amp; Coordination<\/a><\/li>\n<\/ul><\/div>\n<p>      <!-- 2) Generation, propulsion & power quality --><\/p>\n<div class=\"mh-engine-group\">\n        <button class=\"mh-engine-group-head\" type=\"button\"><br \/>\n          <span class=\"mh-engine-group-index\">2<\/span><br \/>\n          <span>Generation, Propulsion &amp; Quality<\/span><br \/>\n        <\/button><\/p>\n<ul class=\"mh-engine-sublist\">\n<li><a href=\"#eto-generators-avr\">Generators, AVR &amp; Excitation<\/a><\/li>\n<li><a href=\"#eto-pms\">PMS: Load Sharing, Shedding &amp; Blackout<\/a><\/li>\n<li><a href=\"#eto-shore-power\">Shore Power \/ Cold Ironing &amp; Energy Management<\/a><\/li>\n<li><a href=\"#eto-transformers\">Transformers, Rectifiers &amp; Inverters<\/a><\/li>\n<li><a href=\"#eto-motors-vfd\">Motors, Starters &amp; VFDs<\/a><\/li>\n<li><a href=\"#eto-electric-propulsion\">Electric Propulsion &amp; Thrusters<\/a><\/li>\n<li><a href=\"#eto-ups-batteries-ess\">UPS, Batteries &amp; ESS<\/a><\/li>\n<li><a href=\"#eto-power-quality\">Power Quality &amp; Harmonics<\/a><\/li>\n<\/ul><\/div>\n<p>      <!-- 3) Systems, specialized & tools --><\/p>\n<div class=\"mh-engine-group\">\n        <button class=\"mh-engine-group-head\" type=\"button\"><br \/>\n          <span class=\"mh-engine-group-index\">3<\/span><br \/>\n          <span>Systems, Maintenance &amp; Tools<\/span><br \/>\n        <\/button><\/p>\n<ul class=\"mh-engine-sublist\">\n<li><a href=\"#eto-cabling\">Cabling, Glanding, Earthing\/Bonding &amp; EMC<\/a><\/li>\n<li><a href=\"#eto-lighting-nav-comms\">Lighting, Navigation &amp; Comms Power<\/a><\/li>\n<li><a href=\"#eto-automation-control\">Automation, Instrumentation &amp; Control<\/a><\/li>\n<li><a href=\"#eto-fire-gas-haz-area\">Fire\/Gas Detection &amp; Hazardous Areas<\/a><\/li>\n<li><a href=\"#eto-aux-systems\">Auxiliary Systems<\/a><\/li>\n<li><a href=\"#eto-specialized\">Specialized: Rigs, DP Plants &amp; Megayachts<\/a><\/li>\n<li><a href=\"#eto-maintenance-testing\">Maintenance, Testing &amp; CMMS<\/a><\/li>\n<li><a href=\"#eto-documentation-compliance\">Documentation, Drawings &amp; Compliance<\/a><\/li>\n<li><a href=\"#eto-checklists-sops\">Checklists, SOPs &amp; Test Records<\/a><\/li>\n<li><a href=\"#eto-calculators-tools\">Calculators &amp; Tools<\/a><\/li>\n<\/ul><\/div>\n<div class=\"mh-engine-nav-footer\">\n        Built for ETOs, electrical officers and engineers looking after ship-wide power &amp; control.\n      <\/div>\n<\/p><\/div>\n<\/p><\/div>\n<p>  <!-- MIDDLE COLUMN \u2013 MAIN CONTENT --><\/p>\n<div class=\"mh-engine-main\">\n<p>    <!-- HERO --><\/p>\n<section class=\"mh-engine-hero\">\n<div class=\"mh-engine-eyebrow\">ETO &amp; Electrical<\/div>\n<h1>ETO &amp; Electrical Systems Hub<\/h1>\n<p>\n        High-voltage, low-voltage, automation and power management in one structured space.<br \/>\n        Use the left-hand <strong>ETO Menu<\/strong> to move between topics without leaving the section.\n      <\/p>\n<div class=\"mh-engine-tags\">\n        <span class=\"mh-engine-tag\">HV\/LV generation &amp; distribution<\/span><br \/>\n        <span class=\"mh-engine-tag\">Protection, PMS &amp; shore power<\/span><br \/>\n        <span class=\"mh-engine-tag\">Electric drives &amp; propulsion<\/span><br \/>\n        <span class=\"mh-engine-tag\">Automation, ESS &amp; tools<\/span>\n      <\/div>\n<div class=\"mh-engine-meta\">\n        <span>\u26a1 For: ETOs \u00b7 Electrical Officers \u00b7 Chief \/ 2E<\/span><br \/>\n        <span>\ud83e\udded Mode: Design \u00b7 Maintain \u00b7 Troubleshoot<\/span>\n      <\/div>\n<\/section>\n<p>    <!-- START HERE --><\/p>\n<section class=\"mh-engine-card\">\n<div class=\"mh-engine-card-eyebrow\">Start here<\/div>\n<h2>What are you dealing with electrically today?<\/h2>\n<p class=\"mh-engine-card-meta\">\n        Pick the card that matches what you\u2019re trying to do in the switchboard room, ER or on deck.\n      <\/p>\n<div class=\"mh-engine-start-grid\">\n<article class=\"mh-engine-start-item\">\n<h3>\ud83d\udcd8 Build foundations<\/h3>\n<p>New to shipboard power or refreshing for HV endorsement and orals?<\/p>\n<p>          <a href=\"#eto-fundamentals\">Go to Electrical Principles &amp; Standards \u2192<\/a><br \/>\n        <\/article>\n<article class=\"mh-engine-start-item\">\n<h3>\ud83d\udea8 Solve a fault<\/h3>\n<p>Dealing with trips, blackouts, alarms or strange readings on PMS \/ protection?<\/p>\n<p>          <a href=\"#eto-maintenance-testing\">Jump to fault-finding &amp; testing \u2192<\/a><br \/>\n        <\/article>\n<article class=\"mh-engine-start-item\">\n<h3>\ud83d\udcca Use tools &amp; test sheets<\/h3>\n<p>Need a test record, protection setting sheet, cable sizing or harmonic check quickly?<\/p>\n<p>          <a href=\"#eto-calculators-tools\">View ETO tools &amp; templates \u2192<\/a><br \/>\n        <\/article>\n<\/p><\/div>\n<\/section>\n<p>    <!-- BROWSE BY SYSTEM --><\/p>\n<section class=\"mh-engine-card\">\n<div class=\"mh-engine-card-eyebrow\">Browse by system<\/div>\n<h2>Everything from generators to automation mapped by system<\/h2>\n<p class=\"mh-engine-card-meta\">\n        Each tile matches a main entry in the ETO Menu on the left.\n      <\/p>\n<div class=\"mh-engine-system-panel\">\n<div class=\"mh-engine-system-text\">\n<h3>1) Fundamentals, safety &amp; distribution<\/h3>\n<p>\n            Core shipboard electrical theory, safe HV\/LV work and how power flows from generators,<br \/>\n            through switchboards and down to final circuits.\n          <\/p>\n<div class=\"mh-engine-system-tags\">\n            <span class=\"mh-engine-system-tag\">LOTO &amp; arc-flash<\/span><br \/>\n            <span class=\"mh-engine-system-tag\">HV\/LV distribution<\/span>\n          <\/div>\n<p>          <a class=\"mh-engine-system-link\" href=\"#eto-safety-hv\">View fundamentals &amp; safety topics \u2192<\/a>\n        <\/div>\n<div class=\"mh-engine-system-image\">\n          <img decoding=\"async\" src=\"https:\/\/images.pexels.com\/photos\/4250477\/pexels-photo-4250477.jpeg?auto=compress&#038;cs=tinysrgb&#038;w=800\"\n               alt=\"Ship electrical switchboard with monitoring panels\"><\/p>\n<div class=\"mh-engine-system-image-caption\">\n            Main switchboard with PMS, protection relays and bus-tie controls under supervision.\n          <\/div>\n<\/p><\/div>\n<\/p><\/div>\n<div class=\"mh-engine-browse-newsletter\">\n<div class=\"mh-engine-browse-newsletter-text\">\n          <strong>ETO technical bulletins<\/strong><br \/>\n          <span>Condensed updates on HV incidents, protection setting changes and EMS best practice.<\/span>\n        <\/div>\n<p>        <a href=\"#\" class=\"mh-engine-browse-newsletter-btn\">Subscribe to ETO briefings \u2192<\/a>\n      <\/div>\n<\/section>\n<p>    <!-- TOOLS & QUICK ACCESS --><\/p>\n<section class=\"mh-engine-card\" id=\"eto-calculators-tools\">\n<div class=\"mh-engine-card-eyebrow\">Tools &amp; quick access<\/div>\n<h2>Protection settings, test sheets and sizing tools<\/h2>\n<p class=\"mh-engine-card-meta\">\n        Fast links for ETOs and engineers who need electrical numbers or forms right now.\n      <\/p>\n<div class=\"mh-engine-tools-grid\">\n<article class=\"mh-engine-tool-item\">\n<h3>\ud83d\udee1 Protection &amp; coordination<\/h3>\n<p>Relay settings, fault level estimates, discrimination checks and trip test records.<\/p>\n<p>          <a href=\"#eto-protection-coordination\">Open protection tools \u2192<\/a><br \/>\n        <\/article>\n<article class=\"mh-engine-tool-item\">\n<h3>\ud83d\udd0c Cables, motors &amp; ESS<\/h3>\n<p>Basic cable sizing, motor starting checks, battery\/ESS logs and harmonics snapshots.<\/p>\n<p>          <a href=\"#eto-cabling\">Open drives &amp; cabling tools \u2192<\/a><br \/>\n        <\/article>\n<\/p><\/div>\n<\/section>\n<p>    <!-- LATEST ARTICLES \/ NEWS + COMMON PROBLEMS --><\/p>\n<section class=\"mh-engine-card\">\n<div class=\"mh-engine-card-eyebrow\">Latest from ETO &amp; Electrical<\/div>\n<h2>Fresh articles, guides and incident reports<\/h2>\n<p class=\"mh-engine-card-meta\">\n        Auto-updated from MaritimeHub ETO articles, safety circulars and OEM technical notes.\n      <\/p>\n<div class=\"mh-engine-browse-grid\">\n        <!-- Latest articles --><\/p>\n<div class=\"mh-engine-latest\">\n<div class=\"mh-engine-latest-header\">\n            <span class=\"mh-engine-section-title\">Latest articles &amp; updates<\/span><br \/>\n            <a href=\"#\">View all ETO articles \u2192<\/a>\n          <\/div>\n<ul class=\"mh-engine-latest-list\">\n<li class=\"mh-engine-latest-item\">\n<p class=\"mh-engine-latest-item-title\">\n                <a href=\"#\">Blackout recovery: practical PMS and protection checklist<\/a>\n              <\/p>\n<p class=\"mh-engine-latest-item-meta\">Guide \u00b7 PMS &amp; Protection<\/p>\n<\/li>\n<li class=\"mh-engine-latest-item\">\n<p class=\"mh-engine-latest-item-title\">\n                <a href=\"#\">Arc-flash and HV permits: what a safe work pack looks like<\/a>\n              <\/p>\n<p class=\"mh-engine-latest-item-meta\">Safety \u00b7 HV Power (3.3\u201311 kV)<\/p>\n<\/li>\n<li class=\"mh-engine-latest-item\">\n<p class=\"mh-engine-latest-item-title\">\n                <a href=\"#\">Integrating shore power into older ships \u2013 lessons learned<\/a>\n              <\/p>\n<p class=\"mh-engine-latest-item-meta\">Article \u00b7 Shore Power &amp; Energy Management<\/p>\n<\/li>\n<\/ul><\/div>\n<p>        <!-- Common problems --><\/p>\n<div class=\"mh-engine-problems\">\n<div class=\"mh-engine-section-title\">Common problems<\/div>\n<p class=\"mh-engine-section-meta\">\n            Quick fault guides for the electrical issues that get you called to the switchboard room at 03:00.\n          <\/p>\n<ul class=\"mh-engine-problems-list\">\n<li class=\"mh-engine-problem-item\">\n              <a href=\"#eto-generators-avr\"><br \/>\n                <span class=\"mh-engine-problem-label\">Generator won\u2019t parallel \/ unstable voltage<\/span><br \/>\n                <span class=\"mh-engine-problem-tag\">AVR<\/span><br \/>\n              <\/a>\n            <\/li>\n<li class=\"mh-engine-problem-item\">\n              <a href=\"#eto-pms\"><br \/>\n                <span class=\"mh-engine-problem-label\">Unexpected load-shedding or blackout<\/span><br \/>\n                <span class=\"mh-engine-problem-tag\">PMS<\/span><br \/>\n              <\/a>\n            <\/li>\n<li class=\"mh-engine-problem-item\">\n              <a href=\"#eto-motors-vfd\"><br \/>\n                <span class=\"mh-engine-problem-label\">Motor tripping on start or VFD faults<\/span><br \/>\n                <span class=\"mh-engine-problem-tag\">Drives<\/span><br \/>\n              <\/a>\n            <\/li>\n<li class=\"mh-engine-problem-item\">\n              <a href=\"#eto-ups-batteries-ess\"><br \/>\n                <span class=\"mh-engine-problem-label\">UPS alarms \/ degraded autonomy<\/span><br \/>\n                <span class=\"mh-engine-problem-tag\">UPS<\/span><br \/>\n              <\/a>\n            <\/li>\n<li class=\"mh-engine-problem-item\">\n              <a href=\"#eto-power-quality\"><br \/>\n                <span class=\"mh-engine-problem-label\">Nuisance trips from harmonics or THD<\/span><br \/>\n                <span class=\"mh-engine-problem-tag\">Quality<\/span><br \/>\n              <\/a>\n            <\/li>\n<\/ul><\/div>\n<\/p><\/div>\n<\/section>\n<p>    <!-- STUDENTS \/ TRAINEES --><\/p>\n<section class=\"mh-engine-card\" id=\"eto-students\">\n<div class=\"mh-engine-card-eyebrow\">Students &amp; trainees<\/div>\n<h2>Study corner for future ETOs<\/h2>\n<p class=\"mh-engine-card-meta\">\n        Built for ETO cadets, electrical trainees and engineers switching from mechanical to electrical roles.\n      <\/p>\n<div class=\"mh-engine-students\">\n<div class=\"mh-engine-students-grid\">\n<div class=\"mh-engine-students-card\">\n<h3>\ud83c\udf93 ETO syllabus &amp; pathways<\/h3>\n<p>From basic AC\/DC through HV and automation to full ETO ticket and endorsements.<\/p>\n<p>            <a href=\"#\">Open ETO study routes \u2192<\/a>\n          <\/div>\n<div class=\"mh-engine-students-card\">\n<h3>\ud83e\uddea Oral questions &amp; case studies<\/h3>\n<p>Scenario-based questions on blackouts, shore power trips, ESS faults and DP powerplants.<\/p>\n<p>            <a href=\"#\">View ETO exam prep tools \u2192<\/a>\n          <\/div>\n<\/p><\/div>\n<\/p><\/div>\n<\/section>\n<p>    <!-- COMMUNITY PICKS --><\/p>\n<section class=\"mh-engine-card\">\n<div class=\"mh-engine-card-eyebrow\">Community picks<\/div>\n<h2>Most helpful this week<\/h2>\n<p class=\"mh-engine-card-meta\">\n        Links most often saved, shared or bookmarked by MaritimeHub members in the last 7 days.\n      <\/p>\n<div class=\"mh-engine-community\">\n<ul class=\"mh-engine-community-list\">\n<li class=\"mh-engine-community-item\">\n<h3><a href=\"#\">Blackout &amp; black-start playbook<\/a><\/h3>\n<p>Step-by-step guide with example PMS screenshots and relay check notes.<\/p>\n<p>            <span class=\"mh-engine-community-meta\">PMS &amp; Generation<\/span>\n          <\/li>\n<li class=\"mh-engine-community-item\">\n<h3><a href=\"#\">ETO test sheet bundle \u2013 HV\/LV<\/a><\/h3>\n<p>Printable and editable test records for insulation resistance, relay tests and UPS checks.<\/p>\n<p>            <span class=\"mh-engine-community-meta\">Maintenance &amp; Testing<\/span>\n          <\/li>\n<li class=\"mh-engine-community-item\">\n<h3><a href=\"#\">Cable, breaker &amp; motor reference crib sheet<\/a><\/h3>\n<p>\u201cAt-a-glance\u201d table of typical ratings, trip curves and starting methods used at sea.<\/p>\n<p>            <span class=\"mh-engine-community-meta\">Cabling &amp; Drives<\/span>\n          <\/li>\n<\/ul><\/div>\n<\/section><\/div>\n<p>  <!-- RIGHT COLUMN \u2013 AD + PHOTOS --><\/p>\n<div class=\"mh-engine-adcol\">\n<p>    <!-- TOP AD --><\/p>\n<section class=\"mh-engine-adbox\">\n<div class=\"mh-engine-adbox-header\">Sponsored<\/div>\n<div class=\"mh-engine-ad-slot\">\n        300 \u00d7 250 ETO sponsor slot\n      <\/div>\n<\/section>\n<p>    <!-- GALLERY --><\/p>\n<section class=\"mh-engine-gallery\">\n<div class=\"mh-engine-gallery-header\">Electrical room photos<\/div>\n<div class=\"mh-engine-gallery-image\">\n        <img decoding=\"async\" src=\"https:\/\/images.pexels.com\/photos\/4250477\/pexels-photo-4250477.jpeg?auto=compress&#038;cs=tinysrgb&#038;w=800\"\n             alt=\"Ship electrical switchboard\">\n      <\/div>\n<p class=\"mh-engine-gallery-caption\">\n        Main switchboard and MCC panels with PMS, metering and protection relays in service.\n      <\/p>\n<div class=\"mh-engine-gallery-controls\">\n        <button class=\"mh-engine-gallery-btn\" type=\"button\">\u25c0 Prev<\/button><br \/>\n        <button class=\"mh-engine-gallery-btn\" type=\"button\">Next \u25b6<\/button>\n      <\/div>\n<\/section>\n<p>    <!-- EXTRA AD SLOT UNDER PHOTOS --><\/p>\n<section class=\"mh-engine-adbox\">\n<div class=\"mh-engine-adbox-header\">Sponsored<\/div>\n<div class=\"mh-engine-ad-slot\">\n        300 \u00d7 250 ETO sponsor slot\n      <\/div>\n<\/section><\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>ETO Menu Choose an ETO topic below. Each entry opens its own articles, tools and troubleshooting pages inside the ETO &amp; Electrical section. 1 Fundamentals, Safety &amp; Distribution Electrical Principles &amp; Standards Safety: LOTO, Arc-Flash &amp; HV Work HV Power (3.3\u201311 kV) LV Distribution Switchboards &amp; MCCs Protection &amp; Coordination 2 Generation, Propulsion &amp; Quality [&hellip;]<\/p>\n","protected":false},"author":199,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_acf_changed":false,"c2c-post-author-ip":"","footnotes":""},"class_list":["post-46426","page","type-page","status-publish","hentry"],"acf":[],"_links":{"self":[{"href":"https:\/\/maritimehub.co.uk\/?rest_route=\/wp\/v2\/pages\/46426","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/maritimehub.co.uk\/?rest_route=\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/maritimehub.co.uk\/?rest_route=\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/maritimehub.co.uk\/?rest_route=\/wp\/v2\/users\/199"}],"replies":[{"embeddable":true,"href":"https:\/\/maritimehub.co.uk\/?rest_route=%2Fwp%2Fv2%2Fcomments&post=46426"}],"version-history":[{"count":1,"href":"https:\/\/maritimehub.co.uk\/?rest_route=\/wp\/v2\/pages\/46426\/revisions"}],"predecessor-version":[{"id":46427,"href":"https:\/\/maritimehub.co.uk\/?rest_route=\/wp\/v2\/pages\/46426\/revisions\/46427"}],"wp:attachment":[{"href":"https:\/\/maritimehub.co.uk\/?rest_route=%2Fwp%2Fv2%2Fmedia&parent=46426"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}