论文部分内容阅读
本文详述了高压电桥灵敏度的基本问题及其测量误差,并结合现场广泛采用的QS1型电桥进行了剖析,提出了包含电桥灵敏度误差在内的tgδ及被试品电容测量误差估算公式。一、高压电桥灵敏度的表示方法高压电桥是一种比较量仪表。图1是原理接线图。高压电桥的灵敏度是指电桥在电压U_2(称参考电压)和U_1(为试验电压,可取U_1=U_2或U≠U_2)作用下,阻抗Z_3或Z_4有增量ΔZ
In this paper, the basic problems of high-voltage bridge sensitivity and their measurement errors are described in detail. Combined with the QS1-type bridge widely used in the field, tgδ including the bridge sensitivity error and the estimation of capacitance measurement error formula. First, the high-voltage bridge that the sensitivity of the method High-voltage bridge is a comparison of the amount of instruments. Figure 1 is the principle wiring diagram. High-voltage bridge sensitivity refers to the bridge in the voltage U_2 (referred to the reference voltage) and U_1 (for the test voltage, preferably U_1 = U_2 or U ≠ U_2), the impedance Z_3 or Z_4 incremental ΔZ