Partial Discharge Testing System Description This system is used for measuring partial discharge of transformer, motor, instrument transformer, cable, GIS, switch and arrester, etc. The system has multi channel measuring function which allows measuring several test or several points. This method can be successfully used for big transformers and transformer substation.Main components No partial discharge transformer Partial discharge measuring instrument Isolation low pass filter Coupling capacitor Current limiting resistance Control panelFrequency 50, 100, 150, 200, 400Hz 3dB fL：10、20、40KHZ optional 3dB fH：80、200、300KHZ optional Rough adjustment 6 range 20±1dB,fine tuning range >20dBMain specification Input No.Tuning capacitance rangeSensibility（PC）unbalanced circuitAllow current RMSunbalancedbalanced10～25～100PF0.0230mA0.25A225～100～400PF0.0450mA0.5A3100～400～1500PF0.06120mA1A4400～1500～6000PF0.10.25A2A51500～6000～25000PF0.20.5A4A60.006～0.025～0.1μF0.31A8A70.025～0.1～0.4μF0.52A15A80.1～0.4～1.5μF14A30A90.4～1.5～6.0μF1.58A60A101.5～6.0～25μF2.515A120A116.0～25～60μF525A200A1225～60～250μF1050A300A7Rresistance0.52A15A
