GB18613-2020对低压电动机电缆截面选择的影响

浏览(132) 下载(2)

作者单位:: 中国石化工程建设有限公司，北京 100000
Sinopec Engineering Incorporation，Beijing 100000，China

关键词:: 低压电动机；能效限定值；起动电流倍数；电动机端子电压；电缆截面
low voltage motor；energy efficiency limit value；multiple of starting current；motor terminal voltage；cable section

摘要:: 摘要：GB18613-2020版新标准发布，提高了对相同额定功率的电动机能效整体要求。电动机

能效要求的增加，带来电动机起动电流倍数的较大变化。文中根据实例阐述了此类变化对低

压电动机电缆截面选择的影响。通过计算、比较及验证，提出可通过适当放大机端启动压降

的要求，降低了因能效限定值升高而使动力电缆截面扩大造成的经济效益下降的解决办法。

Abstract: The GB18613-2020 version of the new standard has been released, which improves the overall requirements for the

energy efficiency of motors with the same rated power. With the increase of motor energy efficiency requirement, the multiple of

motor starting current changes greatly. This paper expounded the influence of such changes on the selection of cable section of low

voltage motor based on examples, put forward solutions by calculation, comparison and verificationto properly enlarge the

requirements of startup pressure drop of motor and then reduce the economic benefit decrease caused by the expansion of the

section of the motor power cable after the increase of the energy efficiency limit.