查询词典 mains

As a rule, the mains frequency is imposed on the wind turbine.

原则上，主电网频率是强施于风机上的。

Instead, they rotate synchronously with the mains frequency.

相反，他们会随着主频同步转动。

The display operates at mains frequency and the output is approx 120v AC.

显示器工作在电源频率和输出是大约120伏特交流电。

The problem depends on how producing enough electric power when low rotate speed, and how be its changeover mains frequency with best method.

难题取决于怎样在低转速时型成足够的电能，以及怎样用最好的办法把其转化为电网周率。

Therefore it can be seen that it will "smooth" the "twice mains frequency DC" into a near constant DC voltage.

因此它可以把"两倍于电源频率的直流电"进行"平滑化处理"，成为一个接近恒定的直流电。

The rotors in these motors do not require any induced current so they do not slip backward against the mains frequency.

这种电机中的转子不需要任何感应电机，所以他们不会低于主频。

In our copper smelting plant, we have advanced mains frequency induction melting furnace, hot extrusion equipment, vacuum annealing furnace and advanced detection instruments. So that we can re-processing of the waste out of high-quality brass materials and raw materials Costs are in a better position.

我们的铜材熔炼厂，配备了先进的工频熔炼炉，大型热挤压设备，真空退火炉及先进的检测仪器，使我们的废料可以再加工出高品质的黄铜材料，我们的原材料成本必然更具优势。

Part One Research on Measuring of Resistive Current Passing Through XLPE Cable With Applying AC Voltage: By many tests,It is found that mains frequency is not sensitive to the mechanical fault of power cable main insulation.Accordingly,a new method that the fault of power cable main insulation is measured by measuring the resistance component of leakage current is put forward.

第一部分对XLPE 电力电缆施加工频交流电压时阻性电流的检测研究：通过大量的试验发现工频交流耐压试验对电力电缆主绝缘的机械损伤不灵敏，从而提出了通过检测泄漏电流的阻性分量来检测电力电缆主绝缘缺陷的新方法。

AC Test Power Supply with AC-DC-AC conversion means, effectively prevent the mains voltage and frequency fluctuations of the dielectric loss test the accuracy of the impact of even the generator, the instrument can also be run correctly.

交流试验电源采用AC-DC-AC转换方式，有效避免市电电压及频率波动对介损测试准确性影响，即便是发电机发电，该仪器也能正确运行。

2TheMax GPX750 PSU for the desktop computer features total output of 750W, rated supply voltage of 115V to 230V auto range, rated mains frequency of 47 to 63 Hz, rated input of 115V at 10A or 230V at 5A, efficiency of 85% minimum at typical load, holdup time of 16.6ms at nominal line under full load condition, power good signal between 100ms to 500ms, over current protection at 110% to 150% individual output power, over voltage protection for +5V is between 5.8V to 6.3V,+12V from 14V to 17V, 3.3V from 3.6V to 4.2V, air flow by DC fan, operating temperature of 0°C to 50°C and operating humidity of 20% to 90% non-condensing.

2themax gpx750电源为桌上型电脑的功能总产量750瓦特，额定电源电压115v到230v汽车范围，额定工频47至63赫兹，额定输入的115v在10 A条或230v在5 ，效率85 ％，最低在典型负载，持的时间16.6ms的名义在网上下，满负荷条件下，电源良好信号之间的100 ms到500ms ，过电流保护在110 ％至150 ％个别的输出功率，过电压保护，为5 V是之间的5.8 V至6.3v ，+12 V的从14v至17v ，电压为3.3 V从V到3.6 V至4.2 V ，空气流量由直流风扇，操作温度0° C到50 ° C和运作中的湿度为20 ％至90 ％，非冷凝。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。