Design of Sensor for Leakage Current of MOA
Rui Xu · Insulators and Surge Arresters · 2013
The voltage signal transmission mode is used when the existing metal-oxide surge arrester(MOA) of lightning arrester leakage current to transmit data using optical fiber.The transmission voltage signal in proportion to the leakage current.There is a problem of short transmission and low efficiency because of the amplitude of the signal is unsteady.The existing sensor of lightning arrester leakage current generally adopt the power supply mode,It may be damaged when lightning entry.When powered by battery,The battery needs to be replaced timing due to its certain life,Thus a kind of sensor of arrester leakage current,which is without external power supply;have long transmission and high efficiency,is introduced.The leakage current of lightning arrester is converted accurately to the optical pulse signal,of which the frequency is proportional to the leakage current.It has a good effect after the application of multiple substations.