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。
L297 chip generates pulse phase sequence signals of which the pulse width is adjustable. The signals are the input ones of dual bridge driving circuit and drive the stepper motor after amplification.
L 297芯片产生脉宽可调的脉冲相序信号，该信号作为双极性桥式功率驱动电路的输入信号，放大后驱动步进电机。
Based on the analysis of main fault types of LV (Low Voltage) flameproof motor, the negative sequence protection principle is proposed for its asymmetric short circuit fault and open phase fault.
通过分析低压隔爆电动机的主要故障类型，针对不对称性短路故障和断相故障提出了采用负序保护原理进行保护的方案。
In the paper, the reduced single phase short-circuit current equation expressing as positive sequence impi dance only is showed.
文中还提出了低压系统中只用正序阻抗表达的单相短路电流的简化计算公式。
Active power filter can compensate current components which include distortion and negative sequence current components when it is used in unbalanced three-phase circuit.
电力有源滤波器能动态补偿不对称三相电路的畸变电流、负序电流分量。
The trigger circuit has multifunction, which will satisfy trigger circuit needs and suit two or three and six cannula trigger circuit, but doesn't require phase-sequence.
而且还具有多种组合，可适合两路、三路或六路触发电路的需要，并对电源无相序要求。
According to the feature of distribution network structure, a practical short circuit calculation method based on fault current compensation and actual phase sequence presentation is put forward.
根据配电网的结构特点，提出了一种基于故障补偿方法与实际相序表示方法相结合的配电网短路电流实用计算方法。
According to the feature of distribution network structure, a practical short circuit calculation method based on fault current compensation and actual phase sequence presentation is put forward.
根据配电网的结构特点，提出了一种基于故障补偿方法与实际相序表示方法相结合的配电网短路电流实用计算方法。
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