宋涛.地电位供电型电子式电流互感器的设计[J].电测与仪表,2012,49(5):80-84. SONG Tao.Design of Electronic Current Transformer Supplied by A Ground Potential Power Source[J].Electrical Measurement & Instrumentation,2012,49(5):80-84.
地电位供电型电子式电流互感器的设计
Design of Electronic Current Transformer Supplied by A Ground Potential Power Source
According to the problems of the electronic current transformer（ECT） with laser energizing,this paper illustrates an ECT with the power source at the ground potential.Employing the insulation structure of the traditional transformer insulated by SF6,the ECT has characteristics such as the sensing unit with an air-core coil for measurement and protection;transmitting the electrical signal to the signal processing unit at the ground potential;the optical power source being taken out and having effective reliability.Utilizing mathematical models,designations and emulations have been done to compute the influence of the ambient temperature.Tests have been done and the experimental results show that this ECT can meet the requirement of the 0.2s level in IEC60044-8.
