Earth shorting insulation test is restricted as a rule to the area of the furnace and there mainly to the immediate area of the furnace coil. The first thing to do is check the function of the earth\nshorting indicator with a 500 Ohm resistance, which is installed in the measurement line. In order to establish whether the earth short lies between the melt and\nthe coil, a significantly higher resistance value must be displayed after disconnecting the bottom electrodes. If the earth short is still present with the same\nvalue, the short must lie outside the furnace coil. In a dark furnace area, the short\nmay even be visible to the naked eye. If the short lies in the area of the supply\nlines or the power supply, this might also be visible in dark working areas. In\nmains frequency systems, earth shorts often occur in the area of the starter resistors. One \u201crough method\u201d is a check using a bridged insulation detector, the\nearthed neutral point of the transformer using a 25 or 35 A fuse. This method can\neven be used over a longer period to arrive at an audible diagnosis, e.g. in the\nbalancing choke or between an iron pile and the coil.\n<\/p>\n","protected":false},"excerpt":{"rendered":"
Earth shorting insulation test is restricted as a rule to the area of the furnace and there mainly to the immediate area of the furnace coil. The first thing to do is check the function of the earth shorting indicator with a 500 Ohm resistance, which is installed in the measurement line. In order to … Continue reading Earth shorting insulation test<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":""},"categories":[2,2],"tags":[],"class_list":["post-1291","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"acf":{"adresse":"","telefon":"","e-mail":"","webseite":""},"_links":{"self":[{"href":"https:\/\/aboutfoundry.com\/en\/wp-json\/wp\/v2\/posts\/1291","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/aboutfoundry.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/aboutfoundry.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/aboutfoundry.com\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/aboutfoundry.com\/en\/wp-json\/wp\/v2\/comments?post=1291"}],"version-history":[{"count":3,"href":"https:\/\/aboutfoundry.com\/en\/wp-json\/wp\/v2\/posts\/1291\/revisions"}],"predecessor-version":[{"id":5557,"href":"https:\/\/aboutfoundry.com\/en\/wp-json\/wp\/v2\/posts\/1291\/revisions\/5557"}],"wp:attachment":[{"href":"https:\/\/aboutfoundry.com\/en\/wp-json\/wp\/v2\/media?parent=1291"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/aboutfoundry.com\/en\/wp-json\/wp\/v2\/categories?post=1291"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/aboutfoundry.com\/en\/wp-json\/wp\/v2\/tags?post=1291"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}