{"version":"1.0","provider_name":"LS\u96fb\u6e90\u30c8\u30e9\u30f3\u30b9\u3001\u7089\u3067\u306f\u3001\u9ad8\u96fb\u5727\u30c8\u30e9\u30f3\u30b9\u3001\u6cb9\u5165\u5909\u5727\u5668-\u9577\u6c99(\u9577\u6c99\u7687\u51a0\u4eee\u65e5\u9152\u5e97)\u5eec\u5c71\u96fb\u5b50\u6280\u8853\u682a\u5f0f\u682a\u5f0f\u4f1a\u793e","provider_url":"https:\/\/www.lstransformer.com\/ja","author_name":"xiangligougou","author_url":"https:\/\/www.lstransformer.com\/ja\/author\/xiangligougou\/","title":"Construction Machinery\uff5cTower Crane Case - LS power transformer, Line reactor, High-voltage transformer, Oil-immersed transformer-CHANGSHA LUSHAN ELECTRONIC TECHNOLOGY CO.,LTD","type":"rich","width":600,"height":338,"html":"<blockquote class=\"wp-embedded-content\" data-secret=\"IMZinjv5t9\"><a href=\"https:\/\/www.lstransformer.com\/ja\/construction-machinery%ef%bd%9ctower-crane-case\/\">\u5efa\u8a2d\u6a5f\u68b0\uff5c\u30bf\u30ef\u30fc\u30af\u30ec\u30fc\u30f3\u306e\u5834\u5408<\/a><\/blockquote><iframe sandbox=\"allow-scripts\" security=\"restricted\" src=\"https:\/\/www.lstransformer.com\/ja\/construction-machinery%ef%bd%9ctower-crane-case\/embed\/#?secret=IMZinjv5t9\" width=\"600\" height=\"338\" title=\"&#8220;Construction Machinery\uff5cTower Crane Case&#8221; &#8212; LS power transformer, Line reactor, High-voltage transformer, Oil-immersed transformer-CHANGSHA LUSHAN ELECTRONIC TECHNOLOGY CO.,LTD\" data-secret=\"IMZinjv5t9\" 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:\/\/www.lstransformer.com\/wp-includes\/js\/wp-embed.min.js\n<\/script>","description":"Tower cranes are tasked with high-altitude lifting of steel bars, formworks, precast components and other heavy materials for main-structure building construction, with operating conditions greatly different from ordinary industrial equipment. Exposed on construction sites, tower cranes are subject to heavy dust, rain and moisture as well as temperature swings of dozens of degrees Celsius between winter and summer. Loads change sharply at the moment of hoisting start-up and braking; slewing and luffing mechanisms keep starting-stopping and reversing directions. Long temporary power-supply cables are shared by multiple high-power construction equipment, giving rise to frequent voltage drop and voltage rise. Equipped with variable-frequency drive systems, tower-crane inverters generate massive 5th and 7th [&hellip;]"}