Quartz fibre strengthen bis maleimide bmi composite material have low to dielectric loss angle , able to bear high temperature , damp and hot , good mechanics performance 摘要石英纤维增强双马来酰亚胺树脂复合材料具有低介电损耗、耐高温、耐湿热及良好的力学性能。
Under the condition of rated voltage and 20 , the tangent of the loss angle of film - paper capacitor is less than 0 . 0008 , and that of film dielectric capacitor is less than 0 . 0005 5 .在额定电压下，温度20时电容器的损耗角正切值，膜纸复合介质tg0 . 0008全膜介质tg0 . 0005 。
7 . qualified insulated cooling impregnant is adopted . the voltage endurance of impregnant sample taken from underside of tank should more than 45kv and the loss angle is less than 0 . 0002 7 .电容器采用符合标准的绝缘冷却油，从油箱下部取出的油样耐压值不小于45kv ， tg0 . 002 。
Through running insulation online monitoring system , the skeme which is designed in this paper satistfied the accuracy and stability of monitoring data of dielectric loss angle ' s tangent 绝缘在线监测系统的实际运行表明本文所研究的介损角正切值在线监测方案达到了测量精度和稳定性要求。
In this paper , on - line monitoring of dielectric loss angle ' s tangent ( dielectric loss factor ) was discussed mainly , in order to improve the accuracy and stability of monitoring data of dielectric loss 本文主要讨论介质损耗角正切值(介质损耗因素)的在线监测，研究如何提高介质损耗角正切值的测量稳定性和精度。
According to the academic analysis of insulation , this paper expatiates the examination ways of electric power insulates , such as shaking - watch , the direct current withstand voltage and measure leakage current , alternating current withstand voltage , measure dielectric loss angle , on - line inspections etc . , to be used to direct the installations and debugging of electrical engineering 通过绝缘介质的理论分析,阐述了电气设备绝缘检查通常的摇表检查,直流耐压及漏泄电流的测量,交流工频耐压,介质损失角的测量,在线检测等方法,以用来指导电气工程施工的安装和调试。
The output of filter is transformed and then dielectric loss angle ' s tangent is computed by three method - fft , faft or czt , later the three method ' s advantage and disadvantage on computing compute dielectric loss angle ' s tangent is contrasted , at last faft is selected in this system 分别用快速傅立叶变换( fft ) 、抗混叠快速傅立叶变换( faft ) 、线性调频z变换( czt )对滤波器输出信号进行变换进而计算介损角正切值，然后比较它们三者在此问题上的优劣，最后我们选用faft法。
