Product Introduction TKJS Tan Delta Test Set is a kind of instrument with high precision fully automatic measuring the dielectric loss tangent and capacitance of various high voltage electrical equipments in the power plants and substations. The adoption of frequency conversion technology could ensure the accurate measurement in the interference of strong electric field. The instrument is equipped with high voltage step-up transformer. Besides it takes security measures like zero-cross closing lightning protection etc. During the experiment different levels of high voltage ranging from 0.5KV to 10kV are outputted. The instrument has the advantages of convenient and safe operation.