About 
Hotline：0514-87346289
Home
1、 Overview
The input unit is an important unit to detect the discharge information in the discharge test circuit, also known as the detection impedance. This input unit is from No.1 to No.12 and 7R, which can meet several PD detection methods recommended by lec270 (parallel method, series method, balance method, etc.). The input unit adopts double tuned input circuit of high frequency transformer. The primary inductance is tuned with the equivalent capacitance of the test circuit in the amplifier frequency band of the partial discharge instrument.
2、Technical index
| No. | Tuning capacitance range |
Sensitivity (pC) (Un-balance circuit) |
RMS Of max. current | |
| (Un-balance Circuit) | (Balance circuit) | |||
| 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 | Resistor | 0.5 | 2A | 15A |
