过电流（短路）
Over current (short circuit)
过电流故障在变频器各种故障当中最为常见。该故障多是由于以下问题造成的：首先，启动时只要升速变频器就报故障，说明过电流很严重，多是负载短路、机械部件卡死、逆变模块软击穿损坏以及加速时间过短造成的;其次变频器一送电就报故障，而且不能“复位”排除，则大多是因为变频器内部驱动电路损坏、电流检测回路损坏等造成的;最后一种现象最为极端，变频器在通电瞬间或经过短暂的延时，便直接造成上级空开跳闸同时机身内部发出炸响或冒出火花，则变频器整流单元、功率逆变元件等直接出现击穿故障所造成的。
Overcurrent fault is the most common fault among inverter. This fault is mostly caused by the following problems: first, when starting, as long as the speed-up converter to report the fault, indicating that the over-current is very serious, mostly caused by load short circuit, mechanical parts stuck, inverter module soft breakdown damage and acceleration time is too short; secondly, the frequency converter on the transmission of the fault, and can not "reset" troubleshooting Most of them are caused by the damage of the drive circuit and the current detecting circuit inside the converter; the last one is the most extreme one. When the converter is switched on or after a short delay, it will directly cause the upper empty tripping while the inner part of the fuselage will explode or spark, then the converter rectifier unit and the power inverter will be used. Components directly cause breakdown.