Skorobogatov, D.N. Bryzgunov, M.I. Kondaurov, M.N. Putmakov, A.A. Repkov, V.V. Reva, V.B. JACoW Publishing Geneva, Switzerland 2226-0374 978-3-95450-218-9 10.18429/JACoW-COOL2019-TUPS05 English 86-88 TUPS05 high-voltage power-supply electron controls interface Contribution to a conference proceedings 2019 2019-11 https://doi.org/10.18429/JACoW-COOL2019-TUPS05 https://jacow.org/cool2019/papers/tups05.pdf The high-voltage power supply system for upgrade of the electron cooling system of CSRE ring in the IMP, was developed at the BINP in 2014 - 2019. The main features are - maximum voltage is 300 kV, stability - 10ppm, with the ability of quick changing of voltage in range ±10% of nominal voltage for a time not more than 500 us. The key points of this design are presented in this article.