详细分析了交流接触器在不同使用条件下的闭合与分断时触点两端电压与回路电流情况，并研究了AC1～AC4工作制下的控制时序。
The conditions of voltage between contactors and current in main circuit under different using types are analyzed in detail, then designed the control sequences with working mode AC1-AC4.
通过试验研究了弱电设备电气连线、制电路板及低压系统保险丝管等耐受雷电流的能力。
Lightning current withstand capacity test of electronic equipment wires and fuse links in low voltage power systems is conducted in laboratory.
另外，三相四线制有源电力滤波器能有效地抑制零线电流，并能有效地解决系统的不对称问题。
Moreover, three-phase four-wire active filters can suppress zero line current, and solve symmetric problem of system effectively.
本型电流互感器的铁心为圆环形，二次绕组匀绕制在铁心圆周上，用环氧树脂混合料浇注成形。
The series of current transformers are resin insulated, fully enclosed and busbar type. The iron core is circular and the secondary winding goes around the core before casting by epoxy.
通过试验验证，该检测方法能够很好的实现对三相四线制系统中的无功和谐波电流的检测。
The experimental results indicate that this method can be used to detect the reactive power and harmonic current exactly in three-phase four-wire system.
首先，本文针对三相四线制的电流检测方法进行了研究。
First of all, current detection method for three-phase four-wire system is researched.
汽车启动机电刷具有短时工作制、电流密度大及接触压降小的特点。
Describing the specialities of the starting motor brushes are of short-time duty system, big current density and the contact voltage drop must be as small as possible.
本发明的制备方法可控性强，能保持制备的晶体管具有大的驱动电流，与现有的工艺兼容，有利于规模生产。
The preparation method has strong controllability, can make the prepared transistor have large drive current, is compatible with the prior process, and is favorable for large-scale production.
通过自组装技术构制了一种简单有效的电流型酪氨酸酶传感器。
An amperometric tyrosinase biosensor was developed with a simple and effective immobilization method using the self-assembled monolayers (SAMs) technique.
实验结果表明，该装置可对三相四线制系统中的谐波、负序、零序等电流分量进行补偿。
Experimental results prove the proposed control method can compensate the harmonic, negative sequence and zero sequence current components in the three phase four wire.
整个三相铁芯由三条曲线硅钢带料卷制而成，中间无气隙及接缝，油箱采用低损耗、低激磁电流、低噪声等特点。
Whole three-phase core is made of three curved silicon steel belt material through rolling, without clearance and seam. The tank has features of low loss, low exciting current, low noise and others.
提出了一种适用于三相三线制不平衡系统的任意次谐波电流检测方法。
A new detection method for random harmonic current which was suitable for 3-wire and 3-phase unbalance system was put forward.
提出了一种适用于三相三线制不平衡系统的任意次谐波电流检测方法。
This dynamic voltage regulator employs a two-leg inverter for three-phase three-wire systems.
电流互感器电流互感器是一种仪表变压器，通常与电流表、制电路、护继电器配套使用。
Ct (Current transformer) Current transformers are instrument transformers used in conjunction with ammeters, control circuits and protective relaying. They usually have5 ampere secondaries.
电流互感器电流互感器是一种仪表变压器，通常与电流表、制电路、护继电器配套使用。
Ct (Current transformer) Current transformers are instrument transformers used in conjunction with ammeters, control circuits and protective relaying. They usually have5 ampere secondaries.
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