查询词典 generator double current

The fault phase and the ground fault generator with the current difference larger than its threshold are thus detected,and the selectivity protection scheme is also presented.

目前国内外已开发的发电机定子接地保护有零序基波电压和三次谐波电压构成的100%定子接地保护、外加电源式定子接地保护等[3~6]。

In room temperature, the pulse needs thousands of voltages and more then ten thousand amperages, which needs prodigious and costly electric current pulse generator.

但在室温条件下使钢的基体组织发生变化，需要数千伏以上电压、上万安培的电流才能达到，这需要庞大的脉冲发生器机组和很高的成本造价，而在800～900℃的高温条件下对合金试样加以千安级以下脉冲电流同样可以达到目的。

Exciters are direct - current generators usually mounted on the generator shaft.

励磁装置是由直流发电机来提供电流的，通常安放在发电机轴上。

Exciters are direct - current generators usually mounted on the generator shaft.

这个冷空气的冷却通常可用一组循环水的方法实现，并且使用前一定要干燥。

Exciters are direct - current generators usually mounted on the generator shaft.

磁场触发是瞬间的，当前发电机通常安装在发电机轴，其作用是激发主发电机的磁场，这种激发能量只需要主发电机能量的1%-2%。

The results of simulation offer the relation between the parameters of generator and maximum fault current.

3在整流系统设计中，可根据短路电流的控制需要，设计和选择合适的同步电机参数，以确保故障保护装置的安全动作。

The necessity and the application of over current protection during start-up course are discussed. gas turbine generator ; start-up with varied frequency ; SFC ; overcurrent with protection low frequency ; relay protection

此外，还有一种观点认为：在变频起动过程中如果发电机定子回路及其引出线发生相间短路，由于变频起动装置内部的可控硅作用，能

This article introduces the new principles of digital proctection for generator transformer unit ,including deviation of power frequency percentage differential relay, variable slope percentage differential relay, asynchronous method of TA saturation recognition, current percentage restricted stator inter-turn relay, etc.

介绍了大型发电机变压器组装置的几项保护新原理，包括发电机工频变化量比率差动、变斜率比率差动、异步法TA饱和判别、电流比率制动匝间保护等。

In chapter 1, the existed problem and current research on vibration of hydropower house with large-sized Francis turbine generator unit are introduced.

文中各章节主要内容如下：第一章介绍了大型混流机组厂房的振动问题及研究现状。

To achieve high reliability rig build momentum across the company Petroleum Chi Chai attached great importance to develop a detailed implementation plan: first, optimizing the current oil market, the popular 4012-based long-stroke diesel engine supporting 1000kW diesel generating sets to meet our 7000 meters below the oil drilling rig for electric power demand in 2009 in the second half on the market; second, strengthen the 4012 Long-stroke diesel engine, and the supporting 1100kW diesel generator sets, China's oil industry to meet the full demand for electric power drill, the end of 2009 the completion of prototype evaluation.

为实现打造高可靠性钻机动力，中油济柴公司上下高度重视，制定详细的实施计划：第一步，优化目前在油田市场广受欢迎的4012型长冲程柴油机配套的1000kW 柴油发电机组，满足我国石油钻探7000米以下电动钻机对动力的需求，2009年下半年投放市场；第二步，强化4012型长冲程柴油机，配套1100kW 柴油发电机组，全面满足我国石油行业电动钻机动力的需求，2009年年底完成样机评定。

Foods high in this vitamin include oily fish such as salmon, tuna and, and fish liver oils.

维生素D含量高的食物包括诸如大麻哈鱼、金枪鱼和鲭鱼之类的油鱼以及鱼肝油。

We need you to cosign our public letter demanding that press intimidation cease immediately, and that all charges be dropped.

我们需要您cosign我们的公共信，要求记者立即停止恐吓，并要求所有收费下降。