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Partial discharge detector and accessories

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Input unit

Time:2020-12-22 06:32:15

Description:

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 lec2...

Detailed introduction
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
 

 


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