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一台1971年进口的捷克产E-302型45t电动起重机,年久失修,原图纸及资料均无从查找。由于工程急需,我们根据原机的绕线式异步电动机串电阻调速原理,重新设计了图纸,用国产电器元件进行了修复,并对原电气系统做了部分改造。 供电方式由原来高压6kV经变压器转换成380/220V电压供电,改为直接低压供电。通过计算,选用3×95mm~2+1×35mm~2橡皮软芯铜
A 1971 imported Czech-made E-302 45t electric crane, disrepair, the original drawings and information are unable to find. Due to the urgent need of the project, we redesigned the drawings according to the principle of speed regulation of the wound winding asynchronous motor series resistors, repaired the domestic electrical components, and partially rebuilt the original electrical system. Power supply from the original high-voltage transformer 6kV converted into 380 / 220V voltage power supply, direct low-voltage power supply. Through the calculation, the choice of 3 × 95mm ~ 2 +1 × 35mm ~ 2 rubber soft copper core