{"id":497,"date":"2019-04-24T15:13:40","date_gmt":"2019-04-24T15:13:40","guid":{"rendered":"https:\/\/www.jpelectricalcompany.com\/blog\/?p=497"},"modified":"2019-04-24T15:13:40","modified_gmt":"2019-04-24T15:13:40","slug":"more-on-electrical-distribution-equipment-failure-should-it-be-kept-or-discarded","status":"publish","type":"post","link":"https:\/\/www.jpelectricalcompany.com\/blog\/uncategorized\/more-on-electrical-distribution-equipment-failure-should-it-be-kept-or-discarded\/","title":{"rendered":"More on Electrical Distribution Equipment Failure \u2013 Should It Be Kept or Discarded?"},"content":{"rendered":"\n

As we promised in our last installment, we will continue the\ndiscussion on equipment failure.  We will\ncontinue to dive into various electrical components and how they work, their longevity,\nusage, and testing.  <\/p>\n\n\n\n

Transformers<\/em><\/h2>\n\n\n\n

Transformers are large scaled pieces of equipment that are\nused to either reduce or increase the voltage produced by a current.  Liquid filled transformers are most often\ninstalled outdoors on a concrete slab, under a canopy to protect against the\nelements.  The liquid serves two\npurposes, it cools the transformer coils and provides insulation between the\ncoils and the grounded tank.  <\/p>\n\n\n\n

Older transformers use insulating mineral oils where as\nnewer transformers use either a silicon based, fluorinated hydrocarbon, or\ncombustion resistant vegetable oil based dielectric fluid or synthetic\nesters.  These insulating fluids break\ndown first due to the entrance of moisture, impurities, and intermittent\nperiods of heating and cooling.  Liquid\ntransformers can deliver consistent service for more than 30 years with regular\nmaintenance, fluid replacement, testing, and repairs.<\/p>\n\n\n\n

Low Voltage Circuit\nBreakers<\/em><\/h3>\n\n\n\n

LV distribution systems commonly use molded case circuit breakers<\/a>.  These systems contain two elements that deteriorate when used, a spring-loaded operating mechanism and copper contacts.  These two components will wear out from abrasion while closing and arching when the breaker is opened.  Larger breakers can be replaced.  <\/p>\n\n\n\n

As these systems age the mechanisms that operate will start\nto slow down which delays clearing times. \nThe springs operating the mechanism are strong and hardly ever need to\nbe fixed or repaired.  Lubrication\nhowever will deteriorate and need to be replenished to avoid the slower\nclearing times.  When a breaker operates\nabove the normal trip rate it should be replaced.  These systems often last upwards of 20 years.  After 20 years replacement is most often\nrecommended whether or not you are seeing slower clearing times during testing.<\/p>\n\n\n\n

Low Voltage and Medium\nVoltage Cables<\/em><\/h4>\n\n\n\n

For most of us cables are quiet simple consisting of a\nstranded aluminum or copper conductor that is wrapped in insulation as well as\na jacket that is resilient to the weather. \nThe manufacturing of electrical power and control cables sounds fairly\nsimple however this industry is one that is in fact highly specialized.<\/p>\n\n\n\n

Assessing the integrity of electrical cabling<\/a> and its remaining longevity is important however can be quite complicated.  Cables can quickly lose electrical integrity while it is in use because of air pockets, gas pockets, and the voids found in the insulation.  This occurs due to thermal expansion and contraction.  If cables are in water their deterioration will occur at a faster rate.  Testing and analysis on these voids will offer up an estimate on the life that remains for the cable. J & P Electrical Company is a full-service electrical company that supplies contractors, end users, and supply houses with new surplus, quality reconditioned, and obsolete electrical equipment. We purchase a wide range of electrical equipment such as bus plugs, bud ducts, panel switches, substations, and transformers.  More information can be found at https:\/\/www.jpelectricalcompany.com<\/a><\/p>\n\n\n


\n
\n<\/p>","protected":false},"excerpt":{"rendered":"

As we promised in our last installment, we will continue the discussion on equipment failure.  We will continue to dive into various electrical components and how they work, their longevity, usage, and testing.  Transformers Transformers are large scaled pieces of equipment that are used to either reduce or increase the voltage produced by a current. …<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[1],"tags":[9,5,6,8,14,13,11,12,10,7],"class_list":["post-497","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-bus-ducts","tag-circuit-breakers","tag-disconnects","tag-bus-plugs","tag-fuses","tag-panel-switches","tag-product-reconditioning-specialists","tag-refurbished-industrial-electrical-components","tag-tap-boxes","tag-transformers"],"acf":[],"yoast_head":"\nMore on Electrical Distribution Equipment Failure \u2013 Should It Be Kept or Discarded? 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