介绍测量对地导纳原理的LD 3型发电机转子一点接地继电器的保护原理。
The paper introduces the principle of LD-3 rotor one-point grounding relay that measures the admittance against the ground.
以整个超声振动系统为研究对象，根据力电类比原理，利用计算机辅助测量导纳圆。
The whole ultrasonic vibration system is taken as a researchful object, and the admittance circle, aided by computer, is measured according to the theory of force-electricity analogy.
采用DDS技术设计并实现了压电晶体导纳圆测量仪。
DDS technique is applied in this paper to design and carry out the piezoelectric crystal admittance circle measurement machine.
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