The work of capacitive dividers does not lead to dangerous ferroresonantphenomena, unlike conventional voltage transformers. They are however, subject tothe influence of residual charges. In the developed mathematical model of acapacitive voltage divider, we examined the transient process resulting from theopening of a live line or cable and subsequent action of automatic repeat switchingon of the line. A simplified version of the circuit facilitating this research is shownin Fig. 7.