Research On Test Method And Typical Reason Of Moa Damp

The main reason for MOA defects is valves being damped. Based on the structure characteristics of MOA and examples of determination, the typical reason of MOA damped during designing assemble, and installing with scupper, antidetonating membrane and closed hole. By simulation tests of different damp zinc oxide varistor, the relationship of leak current and damp level of MOA is tested in the lab. The analysis show that it is necessary to think about the reference voltage and resistive current should be the main criterion of damp level of MOA with on - line detection. FOR the MOA which is not single section, the resistance current on-line detection and infrared thermal imaging are the most effective methods for the condition assessment of MOA, because resistance current is not distinctive feature.