摘要
介绍了IEC60947-4-1:2000低压开关设备和控制设备第4-1部分:机电式接触器和电动机起动器标准修正件2中的部分修正内容,着重介绍了有关电动机过载保护的修正条款:过载继电器的脱扣级别、动作范围和热记忆试验验证等,并介绍了修正件2附录中提供的低压交流电动机在不同额定电压下, 对应各额定功率的额定工作电流指导值。
Introduction was made to partial revision contents in IEC 60947-4-1：2000 Low-voltage switchgear equipment and control equipment Part 4-1： Electro-machinery type Contactor and Motor Starter standard Revision 2, stress was made on motor related over-load protection amending articles：over-load relay＇s trip grade, action range and thermal memory test ＆ verification etc,and as well as the rated working current directive value for corresponding each of the rated power for low-voltage AC motor under different voltages provided in the Appendix of Revision 2.
