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- Collecting Technology of High Frequency Over Voltage and Current Signal Produced by Breaking Contactor 接触器分断时高频过电压及电流信号采集技术
- The VCO presented in this paper has a tunable frequency over 290-470 MHz under control voltage from 1V to 5V, with an output power of 2.20-2.30dBm. 锁相环中的VCO采用了差分对结构的LC压控振荡器结构;在1V到5V的控制电压下能产生290到470的可调频率;输出功率为2.;20到2
- Fatal accidents have decreased in frequency over recent years. 近年来死亡事故发生的频率已经下降。
- Impact in power frequency variation. 频率变化之影响。
- The New Techniques Development of High Voltage High Power Frequency Converter of ABB Co. ABB高压大功率变频器的最新技术发展
- Fatal road accidents have decreased in frequency over recent years. 近年来致命交通事故发生率已经下降。
- The paper discusses the influence on mine equipment such as ventilator and pump of instantaneous voltage-drop of bus from short-circuit and lightening over voltage in mine power supply system. 论述了煤矿供电系统因受短路和雷电过电压而引起母线电压瞬时降低对矿井通风、排水等设备的影响。
- Contrail Frequency over the United States from Surface Observations. 地面观测得到的美国飞行云发生的频率。
- Test Method for Dielectric Breakdown Voltage and Dielectric Strength of Solid Electrical Insulating Materials at Commercial Power Frequencies (10. 固体电绝缘材料在工业电源频率下的介电击穿电压和介电强度的试验方法(10。
- Over voltage protection: It means the voltage of the protected circuit is higher than set value. 过压保护:指被保护线路电压高于设定值。指示灯形式为:黄灯亮;
- However, in this system serious over voltage may occur due to arc grounding fault. 然而,在此系统中可能由于电弧接地故障而出现严重过电压。
- The disconnector shall operator at the power frequency short circuit while MOA's failure under the abnormal conditions. 避雷器带脱离的目的是当避雷器在异常情况下发生故障损坏时，工频短路电流使脱离器工作，脱离器接地端自动脱开，使故障的避雷器与系统脱离，并表明故障避雷器更换。
- Through over voltage on-line monitoring device testing, inquire into lightning protection of the reactor with air core. 并通过安装过电压在线监测装置进行测试的方法,初步探讨了空心电抗器防雷的作用。
- A review on the study on power frequency electromagnetic field hazards to organisms. 工频电磁场生理危害的研究进展。
- The vibration is varied in frequency over a range on the order of 5 to 2,00 0 cps, usually at a constant octave. 振动的频率在5到2000赫的范围内变化，通常用一常值的八阶变化率。
- The vibration is varied in frequency over a range on the order of 5 to 2, 000 cps, usually at a constant octave. 振动的频率在5到2000赫的范围内变化,通常用一常值的八阶变化率。
- When the frequency changer has malfunction, power frequency is adopted, and the motor speed is nonadjustable. 万一变频器出现故障时，可工频驱动，转速不可调。
- With the perfect protection functions in over voltage, under voltage, over heat, over current, over load, safe and reliable. 具有完善的过压,欠压,过热,过流,过载自动保护功能,安全可靠。
- It is pointed out that the power frequency electromagnetic field is inductive field,but not radiation field. 对输变电工程工频电磁场、无线电干扰进行了理论分析,指出输变电工程工频电磁场是感应场,而非辐射场。
- Transient over voltage problems are quickly solved using shunt regulators that clamp regeneration voltage to safe levels. 并联稳压器可以迅速解决瞬态过电压的问题，使电压回到安全水平。
