FIELD: technology for controlling force transformation equipment, possible implementation for construction of reversed flow pulse voltage transformers, grid correctors of power coefficient. ^ SUBSTANCE: device has circuit, consisting of resistor, capacitor and discharge key connected in parallel, and also first threshold device, supporting voltage source, RS-trigger and circuit, consisting of rectifying device, connected to one input of system for selecting maximal voltage, output of which is connected to resistor and to capacitor and discharge key connected in parallel, also, device has second threshold device, logical circuit AND, comparator, logical circuit OR, launching pulses generator. ^ EFFECT: including device in voltage transformers makes possible maximal use of transformers power, decreased weight and dimensions, increased reliability and also increased raw efficiency of transformers. ^ 2 dwg