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1消谐功能： 循环检测PT开口三角的电压，当出现电压升高时，首先判断是单相接地，过渡过程还是电网谐振，如果是谐振，计算机发出指令使消谐电路投入，实现快速消谐。 2故障报警功能： 当系统发生单相接地或谐振、装置故障、装置失电时产生报警信号。 3显示功能： 以中文方式显示实时时钟，装置运行状态，接地或谐振故障的母线序号，故障起始时间等。 4设置功能： 通过汉字菜单提示用户可以设置或修改消谐启动门限电压、实时时钟、通信方式。 5通信功能： 装置具有完善的通信功能，RS-232/485通信接口和通信速率可选。 3.6故障追忆功能： 按时间顺序可追忆十六次接地故障和十六次谐振故障。

1, the elimination of harmonic function: loop detection of the voltage of PT open delta. When the voltage rises, the first judgement is single-phase grounding, the transition process is the power grid resonance. If it is resonance, the computer sends instructions to make the harmonic elimination circuit input, and achieve fast harmonic elimination. 2 fault alarm function: when the system occurs single-phase grounding or resonance, device failure, and the device loses power, the alarm signal is generated. 3 display function: display the real time clock in Chinese, the operation state of the device, the bus serial number of grounding or resonant fault, the start time of the fault, etc. 4 set function: the user can set or modify the elimination of the threshold voltage, real-time clock, and communication mode through the menu of Chinese characters. 5 communication function: the device has perfect communication function, the RS-232/485 communication interface and the communication rate are optional. 3.6 fault recollection function: recollect sixteen grounding faults and sixteen resonant faults in time sequence.