查询词典 phase transformer

For the TA connections of the differential protection for transformer delta side phase winding, the analysis result shows that, there is no difference in the effectiveness for inter turn fault protection, whether it is a bushing TA or not.

但对相间短路故障，三相式变压器△侧绕组差动保护接套管TA时，接法不同，保护效果则不同。

With the power load s rapid growth,the urban power grid construction scale s continual extension,the urban transformer has to provide cable feeder,and 10kV system single-phase ground capacitance-current increases.

本文对城市电网10 kV系统中曲折变容量选择问题进行了分析，并系统地介绍了三种不同用途的曲折变容量选取方法。

This transformer may be applicable to either four-phase transmission systems or AT transaction power supply systems in electric railways.

这种变压器既可用于四相输电系统，也可用于电气化铁路的AT供电系统。

Short-circuit current secretly schemes against , system hits the target to the transformer substation when three-phase short circuit happened in the lower voltage grade bus bar one by one, the difference what be flowed past short-circuit current has been carried out secretly schemes against

短路电流计算，对变电站系统中的各个电压等级下的母线发生三相短路时，所流过的短路电流进行了分别计算。

The power net is injected high frequency impulse signal online from voltage transformer connected to substation bus after the fault of single-phase grounding take place,and then the echo traveling wave from the fault spot corresponding to the high frequency impulse signal is captured by the fault detector installed in the substation.

配电网作为电力系统给用户供电的一个重要环节，它直接给用户提供高质量和可靠的电能，配电网在发生单相永久接地后，为防止发生多点接地短路故障，必须尽快确定故障线路及故障点到供电所的距离，这就是小电流接地电网故障定位问题。

There are requirements for connection orders of the inlet wires of three-phase full bridge SCR welding power source when its main circuit adopts Y/△ connection and synchronous transformer adopts Y/Y connection.

主电路为Y/△接法，同步变压器为Y/Y接法的三相全桥晶闸管焊接电源对电源三相进线接入顺序有要求。

generator transformer unit ; startup failure protection ; negative-sequence current constant value ; open-phase ; setting calculation ; sequence network

因此，现场技术人员对启动失灵保护的负序判据整定依据比较模糊，下面通过计算非全相过程中的负序量进行分析

Introduces in brief the phenomenon o f the twice cutting of the switching o vervoltage generated by the open-phase no-load transformer by t he 10kV vacuum load switch that happened in the substation of our school.

高压真空负荷开关在我国是经过近几十年的研究试验逐步发展起来的，是一种体积小，重量轻、维护方便的一种高压开关，在10kV电力系统中已广泛采用。

Based on these, the single phase converter system is studied in detail, including the selection of the main circuit scheme, the formation of Sine-wave Pulse- width Modulation signal, the design of the drive and protection circuit of IGBT, and the design of high frequency transformer. Finally, the simulation software is employed to test the effect. And the result is satisfactory.

在此基础上，本文主要对电能质量控制稳定器所需的DC/AC控制电源进行了详细研究，包括主电路方案的选择、SPWM波的生成、IGBT的驱动和保护电路、高频变压器的设计以及闭环电压控制原理，最后进行了输出电压的计算机仿真分析，结果是令人满意的。

Phase Shift Controlled Dual-Transformer Flyback Converter for.

相移控制双变压器返驰式转换器之传导性电磁干扰抑制。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐