Coil current transformer is more of an active type of electronic current transformers

Coil current transformer is more of an active type of electronic current transformers. Its general use sensor head coil, with good linearity, insulation, simple structure, no security risks, non-core, non-magnetic saturation phenomenon,  air circuit breaker  bandwidth and accuracy and other fine features, so it has been widely used. However, due to the coil output electromotive force is proportional to the time derivative of the measured current to recover with a current signal  electri cenergy meter  the integral must add the appropriate link. Currently, the integral part of the low-frequency noise, voltage drift and phase response of the integrator is the impact of electronic current transformer low frequency low current measurement accuracy of the main reasons. This paper describes the use of several integrator for their advantages and disadvantages are analyzed and discussed, and the design of digital integrator, laboratory tests show that the method is effective and practical.