接入交流线路设备的不断扩展已经推翻了原来简单的假设-交流线路能为添加的电源负载的每个设备提供纯净、稳定、恒幅的正弦交流电源。当设备不可靠工作时,通常首先怀疑输入电源的质量。必须重视的电源问题包括设备强加在电源线上的干扰和相关的谐波及闪烁特性。IEC1000-3标准清楚地说明了高达16A负载的电器设备所引起的允许干扰级别。 The constant expansion of access to AC line equipment has overturned the simple assumption that AC lines provide a pure, stable, constant amplitude sinusoidal AC power for each device of the added power load. When the device does not work reliably, it is usually first of all doubt about the quality of the input power. Power issues that must be addressed include the interference that the device imposes on the power line and the associated harmonics and flicker characteristics. IEC1000-3 standard clearly shows the allowable interference levels caused by electrical equipment up to 16A load.