This paper introduces a new current protective device based on PLC by analysis the character of the current protective.
通过分析电流保护的特征，设计了一种新型的采用PL C 为核心的电流保护装置。
The constituted elements of the current protective device have three type:electromagnetic, transistor and also microcomputer.
电流保护的构成元件有电磁感应型，晶体管型，微型机。
The operating principle and the use of residual current protective device is introduced, and its selection, installation and limitation are commented.
介绍了剩余电流动作保护器的工作原理及其用途，叙述了剩余电流动作保护器的选型、安装及其局限性。
The paper analyses the importance of software design technology, and aiming at the shortage of current protective device software development, shows that the paper's research is necessary.
本文首先分析了软件设计技术的重要性，针对当前继电保护装置开发中的一些软件开发缺陷问题，说明了本论文研究的必要性。
Selection of ground current, comparison of isolation level and consideration of protective device in the resistance ground system are presented.
介绍了电阻接地系统中，接地电流的选取，绝缘水平比较，保护配置方面的考虑。
In order to reduce the power cut off which caused by electric shock accident and earth-fault power cut off, it must install residual current operated protective device.
低压供用电系统中为了减少发生人身电击事故和接地故障切断电源时引起的停电，必须加装剩余电流动作保护装置。
This paper introduces the parameter selection, installation, grounding mode of low-voltage power grid and construction method of residual current operated protective device.
文中详细论述了剩余电流动作保护装置的参数选用，安装要求，低压电网接地方式及安装施工要求等。
At present, the proposed method has been successfully applied in WXH-803 digital optical fiber current differential protective device.
目前，该方法已成功应用于WXH- 803数字式光纤电流差动保护装置。
Differential relay a differential relay is a protective device that is fed by current transformers located at two different series points in the electrical system.
差动继电器作为保护装置，差动继电器由位于系统中两个不同位置的电流互感器提供反馈信息。
A differential relay is a protective device that is fed by current transformers located at two different series points in the electrical system.
差动继电器作为保护装置，差动继电器由位于系统中两个不同位置的电流互感器提供反馈信息。
Selection of ground current, comparison of isolation level and consideration of protective device in the resistance ground system are pr…
介绍了电阻接地系统中，接地电流的选取，绝缘水平比较，保护配置方面的考虑。
The method and the device acquire and judge the alternating current directly, shorten the signal acquisition time and the protective time during overcurrent.
本发明直接对交流电流进行采集和判断，缩短了信号采集时间和电流过流时的保护时间。
The influence of impulse current waveform on 50 Hz continuous current of switching type surge protective device(SPD) was studied.
研究了冲击电流波形对开关型电涌保护器（SPD）的工频续流的影响。
The classification of failure and its distribution of DZL118 series residual current operated protective device were introduced, the causes of failure were analyzed.
介绍了DZL1 1 8系列漏电断路器产品的故障分类及其分布，分析了故障原因。
The classification of failure and its distribution of DZL118 series residual current operated protective device were introduced, the causes of failure were analyzed.
介绍了DZL1 1 8系列漏电断路器产品的故障分类及其分布，分析了故障原因。
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