Application of the noise protection transformer in the measuring system for laboratory studies of the electrical discharge development in liquid dielectrics

A noise protection transformer was used for elimination of the interferences in the control circuit of the flash lamp of a laser used in the measuring system for laboratory studies of the electrical discharge development in liquid dielectrics. The source of conducted disturbances was the lightning generator when it was supplying impulses to the tested electrode setup. Interferences caused release of the flash lamp not in the required time from the moment of discharge initiation, thus registration of the shadowgraph photo was not possible. To explain this phenomena the attenuation of SURGE and BURST transients by the noise protection transformer was tested. In the paper determined transformation properties of tested noise protection transformer for the differential and common mode impulse conducted disturbances are presented and discussed. The analysis confirmed that tested device effectively attenuates SURGE and BURST transients. This explained the increase of the flash lamp control circuit immunity to conducted disturbances.