This versatile system is specifically designed for measuring partial discharge in various electrical equipment, including transformers, motors, instrument transformers, cables, GIS, switches, and arresters, among others. The system's multi-channel measuring capability enables simultaneous testing at multiple points or for multiple tests. 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 panel
Frequency 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 >20dB
Main specification
| Input No. | Tuning capacitance range | Sensibility（PC）unbalanced circuit | Allow current RMS | |
| unbalanced | balanced | |||
| 1 | 0～25～100PF | 0.02 | 30mA | 0.25A |
| 2 | 25～100～400PF | 0.04 | 50mA | 0.5A |
| 3 | 100～400～1500PF | 0.06 | 120mA | 1A |
| 4 | 400～1500～6000PF | 0.1 | 0.25A | 2A |
| 5 | 1500～6000～25000PF | 0.2 | 0.5A | 4A |
| 6 | 0.006～0.025～0.1μF | 0.3 | 1A | 8A |
| 7 | 0.025～0.1～0.4μF | 0.5 | 2A | 15A |
| 8 | 0.1～0.4～1.5μF | 1 | 4A | 30A |
| 9 | 0.4～1.5～6.0μF | 1.5 | 8A | 60A |
| 10 | 1.5～6.0～25μF | 2.5 | 15A | 120A |
| 11 | 6.0～25～60μF | 5 | 25A | 200A |
| 12 | 25～60～250μF | 10 | 50A | 300A |
| 7R | resistance | 0.5 | 2A | 15A |
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