Electronic integration of the de-noised PD signal to measure the charge of the
captured PD pulses.
Typical oscilloscopic records gained in an industrial PD test field are shown in
Fig. 4.46. The screenshot displayed in Fig. 4.46 a, b reveal that under practical
condition the signal-to-noise ratio can substantially be enhanced if the abovedescribed
non-conventional concept is adopted. In this context, it should be
mentioned that the above-described concept was also beneficial employed for a
hand-held, battery-powered PD probe to enhance the signal-to-noise ratio required
for PD diagnostics of HV apparatus under on-site condition (Lemke 1985, 1988,1991)