excess current meaning in English

过电流
过剩电流
过载电流

4 . the hardware of electronic control system is developed . it includes display module whose tasks are man - machine interaction , displaying humidity and temperature , setting humidity , time , date and week , communicating with computer ; power device module which provides power of all modules and drives control equipments to accomplish intention of main control module and can provide zero crossing protection circuit , excess voltage and under voltage protection circuit and excess current protection circuit ; water sensor group , the responsibilities of which are testing the states of water and send the states to scm , then the scm control the water level after judging the states
开发并实现了电控系统的硬件部分，包括显示模块：主要负责人机交互，显示湿度、温度，修改湿度、时间、日期、星期，和主控模块通讯；电源驱动模块：主要提供各个模块的电源，驱动被控设备，实现主控模块的意图，并能实现继电器的过零保护，过流、过压、欠压保护；水位传感器组：负责测知水位的状态，并把此状态送入单片机，单片机经过判断、处理反过来控制水位，实现水位的闭环控制。