{"version":"1.0","provider_name":"LES Lighting","provider_url":"https:\/\/leslightning.com\/blog","author_name":"blogLES_admin","author_url":"https:\/\/leslightning.com\/blog\/author\/blogles_admin\/","title":"Accuracy Classes of CT PT Transformers Explained - LES Lighting","type":"rich","width":600,"height":338,"html":"<blockquote class=\"wp-embedded-content\" data-secret=\"yzBQRMe31f\"><a href=\"https:\/\/leslightning.com\/blog\/accuracy-classes-of-ct-pt-transformers-explained\/\">Accuracy Classes of CT PT Transformers Explained<\/a><\/blockquote><iframe sandbox=\"allow-scripts\" security=\"restricted\" src=\"https:\/\/leslightning.com\/blog\/accuracy-classes-of-ct-pt-transformers-explained\/embed\/#?secret=yzBQRMe31f\" width=\"600\" height=\"338\" title=\"&#8220;Accuracy Classes of CT PT Transformers Explained&#8221; &#8212; LES Lighting\" data-secret=\"yzBQRMe31f\" 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:\/\/leslightning.com\/blog\/wp-includes\/js\/wp-embed.min.js\n<\/script>\n","thumbnail_url":"https:\/\/leslightning.com\/blog\/wp-content\/uploads\/2025\/04\/o4.png","thumbnail_width":350,"thumbnail_height":330,"description":"Accuracy Classes of CT PT Transformers Explained Current Transformers (CTs) and Potential Transformers (PTs) are the backbone of modern electrical measurement and protection systems. Their primary role is to step down high currents and voltages to safe, measurable levels while maintaining accuracy. Among the many technical parameters that define their performance, accuracy class is one of the most critical. Understanding accuracy classes helps engineers, utilities, and industrial users select the right transformer for metering, protection, &hellip;"}