Product Description
RSJFD system detection method is pulse current method which is
currently most widely used in the world, the basic principle is
following: when the test object generates one time partial
discharge, there is the transient voltage change △U on both
terminals of the test object ,then go to the detection impedance Zm
via a coupling capacitance Ck, then there will be one pulse current
I in the circuit. Sample the pulse voltage generated when this
pulse current I passes the detection impedance Zm , amplified and
displayed, finally, it can determine the actual loaded discharge,
etc. of the partial discharge. The pulse current method mainly uses
the lower frequency part of the partial discharge signal frequency
spectrum, which can avoid wireless interference.
RSJFD system is a testing system in the form of pulse peak
indication, it possesses functions such as computer
program-controlled filtering, amplification, sampling, storage and
display. It can test the actual loaded discharge q, discharge
repetition rate n, average discharge current I, and quadratic rate
D, it also can make different atlases: q-n, q-φ, q-φ-t, etc.
Feature/Function
System Parameters of JFD-251 Partial Discharge Test System
| Measuring-channel | Channel 2 |
| Detection sensitivity | 0.1 pC |
| Programmable filter settings file | Low side 10, 20, 40 kHz High end 100,200,300 kHz |
| Gain dynamic range | 120 dB |
| Sampling rate | Every channel 0.1μs/dot |
| Sample size | 8bit±1/2 LSB |
| Synchronous frequency | 50,100,150,200Hz or any frequency |
| Basic pulse generator | JFD－301 |
| Basic pulse voltage | 0.2V,0.5V, 1V,2.0V,5V,10V Adjustable |
| Standard capacity | 50pF,200pF Adjustable |
| Calibration pulse voltage rise time | ＜60ns |
| Calibration pulse voltage fall time | ＞100μs |
| Work power | AC220V±10%,50Hz |
