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- power frequency sparking test 工频火花电压试验
- Impact in power frequency variation. 频率变化之影响。
- Using Portable power frequency electric quantity test instrument as co ntrolled equipments can measure and control equipments on-line by the pocket PC . 采用便携式工频电量测试仪作为受控设备,利用掌上电脑对受控设备进行在线测量和控制。
- The spark test which is specified in this standard shall be applied at the stages of manufacture indicated by the cable specification. 这个标准里关于火花测试的内容对于电线电缆制造业是很有用的。
- The test results in this paper show that ZnO arrestor unit with a series gap for transmission lines is able to cut off power frequency current quickly before the circuit breaker operate. 试验研究证实：氧化锌限流元件串联放电间隙能够在断路器动作之前，快速截断工频续流。
- Spark test voltage values given by the potential difference between the test electrode and the conductor of the core or cable under test shall be specified in the cable standard. 火花试验时,电极与被测试电线或电缆之间的电位差的值在电线标准中有明确规定。
- 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。
- 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 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
- DC spark testing generates practically no corona and no heat, and is therefore a gentler test process, DC can be used on foamed insulation and thin insulation. 直流火花机几乎不能产生电晕和热量?因此它是一种轻微的测试方法?直流火花机可用于发泡和薄的绝缘。
- 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。
- 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。
- 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。
- high frequency spark gap oscillator 高频电火花隙发生器
- It is recommended that, when spark testing is being carried out, the following precautions should be observed by the user. 火花机在使用的过程中,操作人员必须注意以下事项
- The average EEG(AEEG) increased while the average mean power frequency (MPF) and comprexity of EEG decreased in muscle fatigue. 肌肉疲劳过程中平均脑电值(AEEG)均值增加,平均功率频率值(MPF)和脑电信号复杂度[C(n)]均值下降,该现象广泛分布于整个大脑皮层;
- Review neutral line potential shift protecto,rdepict mostly index of power frequency overvoltage 、 undervoltage and electric surge protection. 通过对中性线电位偏移保护器的回顾,简述了中性线电位保护器的设计思想和工频过、欠电压保护的主要指标。
- Discharge Influencing Factors of Spark Test Device 影响火花试验装置放电因素的探讨
- The principle of arc-suppression coil with three phases and five columns,and theory of power frequency extinguishing arcing were introduced. 介绍了三相五柱式消弧线圈的工作原理,单相电弧接地过电压的工频熄弧理论。
- For three-phase AC power supply systems and locomotive converter complex and electric locomotives gradually tend to adopt a one-way AC power frequency. 因三相交流供电系统和机车变流装置复杂，电力机车逐渐趋向采用工频单向交流电。
