我公司广大职工发扬“独立自主、自力更生”的革命精神,几年来各仓库普遍革新制造了2～5吨的电动轮胎起重机。它的起重、旋转、吊杆起伏以及在仓库内短途行走一般都用四芯软线把380伏的电网交流电源接入起重机作为动力,并将四芯软线中的一根相线和接地线(0线)构成220伏电源供照明与操作警铃应用。但这样使得起重机的机体带电,在潮湿 The vast majority of staff and workers of our company carry forward the revolutionary spirit of “independence and self-reliance”. In recent years, the warehouse has been rebuilt to manufacture 2 to 5 tons of electric tire cranes. Its lifting, rotation, boom and short walk in the warehouse are generally four-core cord to the 380-volt AC power access crane as a driving force, and a four-phase cord in a phase and ground The line (0 line) forms a 220 volt power supply for lighting and operating alarm applications. But this makes the crane body charged, in wet