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。
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 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。
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