在系统3—35KV线路中一旦发生弧光接地过电压，微机消弧控制器向故障相真空接触器发出合闸命令，故障相真空接触器快速动作，在2个周波内将弧光接地转化为金属性接地。故障点因弧光过电压为零而立即熄弧，非故障相过电压稳定在 倍的额定相电压，可以长时间安全运行（国家规程要求2小时）。此时由值班人员对故障线路进行处理，或由微机钢制闸门 钢坝 保定轻钢别墅 保定办公家具  选线装置自动处理。本装置中的微机消弧消谐控制器还设置了PT断线、装置故障报警等功能；当系统发生接地故障时可发出动作信号，显示故障性质（弧光接地或金属接地或谐振）并显示故障相别；本装置设有RS485微机通讯接口，可实现与计算机联网，与综保厂家后台实现通讯。
Once the arc grounding overvoltage occurs in the 3-35KV line of the system, the microcomputer arc suppression controller sends the closing order to the fault phase vacuum contactor, and the fault phase vacuum contactor acts quickly. The arc grounding is transformed into metal grounding in two cycles. The arc is extinguished immediately because the arc overvoltage is zero at the fault point, and the non-fault phase overvoltage is stable at twice the rated phase voltage. It can be operated safely for a long time (2 hours required by the national regulation). At this time, the duty line is processed by the duty personnel or automatically processed by the microcomputer route selection device. The microcomputer arc suppression and harmonic elimination controller in the device also has PT broken line, device fault alarm and other functions; when the system grounding fault occurs, it can send out action signals to show the nature of the fault (arc grounding or metal grounding or resonance) and show the difference between the fault; the device has RS485 microcomputer communication interface, which can be connected with the computer. Net, communicate with the background of the comprehensive insurance factory