{"id":843,"date":"2019-01-18T01:58:59","date_gmt":"2019-01-18T01:58:59","guid":{"rendered":"http:\/\/johnbrear-plantintegrity.com\/?page_id=843"},"modified":"2019-01-22T08:42:06","modified_gmt":"2019-01-22T08:42:06","slug":"reliability-centred-maintenance-of-11kv-switchgear","status":"publish","type":"page","link":"https:\/\/johnbrear-plantintegrity.com\/?page_id=843","title":{"rendered":"Reliability-centred maintenance of 11KV switchgear"},"content":{"rendered":"<figure id=\"attachment_844\" aria-describedby=\"caption-attachment-844\" style=\"width: 280px\" class=\"wp-caption alignright\"><img fetchpriority=\"high\" decoding=\"async\" src=\"http:\/\/johnbrear-plantintegrity.com\/wp-content\/uploads\/2019\/01\/Switchgear-image.jpg\" alt=\"\" width=\"280\" height=\"360\" class=\"size-full wp-image-844\" srcset=\"https:\/\/johnbrear-plantintegrity.com\/wp-content\/uploads\/2019\/01\/Switchgear-image.jpg 559w, https:\/\/johnbrear-plantintegrity.com\/wp-content\/uploads\/2019\/01\/Switchgear-image-234x300.jpg 234w\" sizes=\"(max-width: 280px) 100vw, 280px\" \/><figcaption id=\"caption-attachment-844\" class=\"wp-caption-text\">Switchgear<\/figcaption><\/figure>\r\n<p><strong>Item:<\/strong><\/p>\r\n<ul>\r\n    <li>11KV switchgear in a regional power distribution network<\/li>\r\n    <li>75,000+ items of plant<\/li>\r\n    <li>8 year \u201cmaintenance\u201d cycle, costing approx. \u00a31m per annum<\/li>\r\n    <li>No method in place for predicting possible failures<\/li>\r\n    <li>Difficult to incorporate into business planning<\/li>\r\n<\/ul>\r\n<p><strong>Objective:<\/strong><\/p>\r\n<ul>\r\n    <li>Optimisation of switchgear inspection and maintenance, to reduce costs and minimise engineering disruption<\/li>\r\n<\/ul>\r\n<p><strong>Approach:<\/strong><\/p>\r\n<ul>\r\n    <li>Analysis of failure incident reports by switch type, age, duty and failure mode \u2013 as data exist<\/li>\r\n<\/ul>\r\n<figure id=\"attachment_1007\" aria-describedby=\"caption-attachment-1007\" style=\"width: 280px\" class=\"wp-caption alignright\"><img decoding=\"async\" src=\"http:\/\/johnbrear-plantintegrity.com\/wp-content\/uploads\/2019\/01\/11kV-switchgear.jpg\" alt=\"\" width=\"280\" height=\"426\" class=\"size-full wp-image-1007\" srcset=\"https:\/\/johnbrear-plantintegrity.com\/wp-content\/uploads\/2019\/01\/11kV-switchgear.jpg 337w, https:\/\/johnbrear-plantintegrity.com\/wp-content\/uploads\/2019\/01\/11kV-switchgear-197x300.jpg 197w\" sizes=\"(max-width: 280px) 100vw, 280px\" \/><figcaption id=\"caption-attachment-1007\" class=\"wp-caption-text\">11kV switchgear<\/figcaption><\/figure>\r\n<p><strong>Results:<\/strong><\/p>\r\n<ul>\r\n    <li>Quantification of failure rates and reliability measures, for switch types with sufficient populations, as a function of age<\/li>\r\n    <li>Calculation of the effect on reliability of varying the maintenance interval<\/li>\r\n    <li>Calculation of the effect on reliability of different sampling levels for inspection, recognising that intrusive inspection can initiate problems<\/li>\r\n    <li>Insufficient data to identify any effects of duty or environment<\/li>\r\n<\/ul>\r\n<p><strong>Benefits:<\/strong><\/p>\r\n<ul>\r\n    <li>Specification of initial inspection and maintenance plans, with rules for their continued optimisation as results are accrued<\/li>\r\n    <li>Considerable savings on inspection and maintenance costs<\/li>\r\n    <li>Understanding and control of system reliability<\/li>\r\n<\/ul>\r\n<p><strong>Publication:<\/strong><\/p>\r\n<p>Brear, J.M., Dean, R.J., Johnson, T.D. and Jones, G.T.<br \/>\r\n\u201cIncreasing condition monitoring to reduce unplanned outages and equipment replacement\u201d<br \/>\r\nERA Conf \u2018Engineering Asset Management for Utilities, Industry and Commerce\u2019<br \/>\r\nLondon, October 1999<br \/>\r\n&#160;<\/p>","protected":false},"excerpt":{"rendered":"<p>Item: 11KV switchgear in a regional power distribution network 75,000+ items of plant 8 year \u201cmaintenance\u201d cycle, costing approx. \u00a31m per annum No method in place for predicting possible failures Difficult to incorporate into business planning Objective: Optimisation of switchgear inspection and maintenance, to reduce costs and minimise engineering disruption Approach: Analysis of failure incident &hellip; <a href=\"https:\/\/johnbrear-plantintegrity.com\/?page_id=843\" class=\"more-link\">Continue reading <span class=\"screen-reader-text\">Reliability-centred maintenance of 11KV switchgear<\/span> <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"parent":173,"menu_order":4,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-843","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/johnbrear-plantintegrity.com\/index.php?rest_route=\/wp\/v2\/pages\/843","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/johnbrear-plantintegrity.com\/index.php?rest_route=\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/johnbrear-plantintegrity.com\/index.php?rest_route=\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/johnbrear-plantintegrity.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/johnbrear-plantintegrity.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=843"}],"version-history":[{"count":7,"href":"https:\/\/johnbrear-plantintegrity.com\/index.php?rest_route=\/wp\/v2\/pages\/843\/revisions"}],"predecessor-version":[{"id":1010,"href":"https:\/\/johnbrear-plantintegrity.com\/index.php?rest_route=\/wp\/v2\/pages\/843\/revisions\/1010"}],"up":[{"embeddable":true,"href":"https:\/\/johnbrear-plantintegrity.com\/index.php?rest_route=\/wp\/v2\/pages\/173"}],"wp:attachment":[{"href":"https:\/\/johnbrear-plantintegrity.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=843"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}