Can reliably determine, within the community and bounds detection ma level and zero-sequence current phase short circuit fault current, automatic removal of single-phase ground fault and phase fault.
能可靠判断、检测界内与界外毫安级零序电流及相间短路故障电流，实现自动切除单相接地故障和相间短路故障。
The latter makes use of zero sequence voltage detection, alarm and display circuit.
信号报警显示部分由零序电压检测、报警、显示等电路构成。
The circuitry is described including single chip computer , signal converting circuit, constant current supply circuit and zero-detection circuit.
介绍了电路系统，包括微机部分、信号转换与处理电路、恒流源电路、测零电路等硬件。讨论了软件设计的有关问题。
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