{"version":"1.0","provider_name":"Electrical Riddle","provider_url":"https:\/\/electrical-riddle.com\/fa","author_name":"Electrical Riddle","author_url":"https:\/\/electrical-riddle.com\/fa","title":"Transformer Riddle No.1 &ndash; The mysterious voltage transformer - Electrical Riddle","type":"rich","width":600,"height":338,"html":"<blockquote class=\"wp-embedded-content\" data-secret=\"lZopEoYDVW\"><a href=\"https:\/\/electrical-riddle.com\/fa\/forums\/topic\/70\/\">Transformer Riddle No.1 &ndash; The mysterious voltage transformer<\/a><\/blockquote><iframe sandbox=\"allow-scripts\" security=\"restricted\" src=\"https:\/\/electrical-riddle.com\/fa\/forums\/topic\/70\/embed\/#?secret=lZopEoYDVW\" width=\"600\" height=\"338\" title=\"&#8220;Transformer Riddle No.1 &ndash; The mysterious voltage transformer&#8221; &#8212; Electrical Riddle\" data-secret=\"lZopEoYDVW\" frameborder=\"0\" marginwidth=\"0\" marginheight=\"0\" scrolling=\"no\" class=\"wp-embedded-content\"><\/iframe><script>\n\/*! This file is auto-generated *\/\n!function(d,l){\"use strict\";l.querySelector&&d.addEventListener&&\"undefined\"!=typeof URL&&(d.wp=d.wp||{},d.wp.receiveEmbedMessage||(d.wp.receiveEmbedMessage=function(e){var t=e.data;if((t||t.secret||t.message||t.value)&&!\/[^a-zA-Z0-9]\/.test(t.secret)){for(var s,r,n,a=l.querySelectorAll('iframe[data-secret=\"'+t.secret+'\"]'),o=l.querySelectorAll('blockquote[data-secret=\"'+t.secret+'\"]'),c=new RegExp(\"^https?:$\",\"i\"),i=0;i<o.length;i++)o[i].style.display=\"none\";for(i=0;i<a.length;i++)s=a[i],e.source===s.contentWindow&&(s.removeAttribute(\"style\"),\"height\"===t.message?(1e3<(r=parseInt(t.value,10))?r=1e3:~~r<200&&(r=200),s.height=r):\"link\"===t.message&&(r=new URL(s.getAttribute(\"src\")),n=new URL(t.value),c.test(n.protocol))&&n.host===r.host&&l.activeElement===s&&(d.top.location.href=t.value))}},d.addEventListener(\"message\",d.wp.receiveEmbedMessage,!1),l.addEventListener(\"DOMContentLoaded\",function(){for(var e,t,s=l.querySelectorAll(\"iframe.wp-embedded-content\"),r=0;r<s.length;r++)(t=(e=s[r]).getAttribute(\"data-secret\"))||(t=Math.random().toString(36).substring(2,12),e.src+=\"#?secret=\"+t,e.setAttribute(\"data-secret\",t)),e.contentWindow.postMessage({message:\"ready\",secret:t},\"*\")},!1)))}(window,document);\n\/\/# sourceURL=https:\/\/electrical-riddle.com\/wp-includes\/js\/wp-embed.min.js\n<\/script>","description":"Voltage transformers are occasionally used to adapt voltage protective relays and instruments with nominal voltage of main circuit in low voltage switchgears. In an electrical panel test program an interesting thing was observed. In the panel a three phase voltage transformer with following technical characteristics was used to adapt one 110 V AC under voltage &hellip;  \u0627\u062f\u0627\u0645\u0647 \u00bb","thumbnail_url":"https:\/\/electrical-riddle.com\/wp-content\/uploads\/2021\/08\/778038529_5.gif"}