High- voltage power supply 30 kV with a digital meter. It is intended for the safe carrying out of experiments in chemistry with the use of high voltage. The source should correspond to the following basic technical parameters: Voltage from a network of an alternating current 220 V In Power consumption, no more than 30 Втu. Target pressure from 0 up to 30 k w with smooth adjustment. Digital indication of a target pressure. The maximal current of loading – 0.2 мА. The source should have protection against short circuit and an overload of current on an output