{"id":2637,"date":"2010-10-11T08:13:29","date_gmt":"2010-10-11T15:13:29","guid":{"rendered":"http:\/\/nocapx2020.info\/?p=2637"},"modified":"2010-10-11T11:52:49","modified_gmt":"2010-10-11T18:52:49","slug":"fiber-optic-transmission-oops","status":"publish","type":"post","link":"https:\/\/nocapx2020.info\/?p=2637","title":{"rendered":"Fiber Optic & Transmission – OOPS!"},"content":{"rendered":"

\"damags03\"<\/a><\/p>\n

This is in the OOPS! category.\u00c2\u00a0 Thanks to Tim Carlsgaard for reminding me of this report that I’d mentioned at a hearing recently — it’s got one of those technical findings that cracks me up:<\/p>\n

The issue of safety of service personnel and the public arises in situations when low-voltage power is brought from a distribution system to the vicinity of high-voltage power lines to operate the electronic equipment. A fault or a switching surge on the high-voltage line may induce very high voltages in the low-voltage system.\u00c2\u00a0 This can cause damage to the equipment and also present a hazard to nearby humans.\u00c2\u00a0 In addition, concerns exist that the fault current flowing to ground in situations of high tower footing impedance can raise the potential of the local ground (GPR) to hazardous levels.\u00c2\u00a0 If the low-voltage supply system is also grounded at the fault location, the GPR can be transferred long distances through the low-voltage neutral (Transferred Potential) into the distribution system and into residences.\u00c2\u00a0 Experience has shown that these situations are rare, but can be very hazardous, leading to electrocution and residential fires, when they occur.\u00c2\u00a0 At this time, no obvious solutions can be suggested.<\/em><\/strong><\/span><\/p><\/blockquote>\n

Here’s the full study:<\/p>\n

EPRI – Fiber Optic Cables in Overhead Transmission Corridors<\/a><\/p><\/blockquote>\n","protected":false},"excerpt":{"rendered":"

This is in the OOPS! category.\u00c2\u00a0 Thanks to Tim Carlsgaard for reminding me of this report that I’d mentioned at a hearing recently — it’s got one of those technical findings that cracks me up: The issue of safety of …<\/span> Continue reading →<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[212,370,337,8],"tags":[],"class_list":["post-2637","post","type-post","status-publish","format-standard","hentry","category-brookings-routing-docket","category-fargo-st-cloud","category-hampton-alma","category-reports-documents"],"_links":{"self":[{"href":"https:\/\/nocapx2020.info\/index.php?rest_route=\/wp\/v2\/posts\/2637","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/nocapx2020.info\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/nocapx2020.info\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/nocapx2020.info\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/nocapx2020.info\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=2637"}],"version-history":[{"count":4,"href":"https:\/\/nocapx2020.info\/index.php?rest_route=\/wp\/v2\/posts\/2637\/revisions"}],"predecessor-version":[{"id":2641,"href":"https:\/\/nocapx2020.info\/index.php?rest_route=\/wp\/v2\/posts\/2637\/revisions\/2641"}],"wp:attachment":[{"href":"https:\/\/nocapx2020.info\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2637"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/nocapx2020.info\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=2637"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/nocapx2020.info\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=2637"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}