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Three single-phase voltage relays or one three-phase?! What to choose?! I offer four possible solutions to this issue. Let's figure it out. -------------------- Similar videos on the channel: 1. Voltage control relay SR-721-1 (Euroavtomatika). Connection, setup and testing • Voltage control relay SR-721-1 (Ev... 2. Voltage relay RBUZ D2-63. My favorite! • Voltage relay RBUZ D2-63. My favorite! 3. UZM-50Ts (Meander). Not perfect yet! Full review and testing 4. Selectivity of RCDs and residual-current circuit breakers • Selectivity of RCDs and residual-current circuit breakers 5. Testing of circuit breakers with current of 1.13 In (ABV, Schneider Electric, IEK, EKF, KEAZ, TDM, Elvert) • Testing of circuit breakers with current of 1.13 In (AB... -------------------- Thanks to the channel: http://zametkielectrika.ru/blagodarno... Website: http://zametkielectrika.ru Electricians' Forum: http://forum-electrikov.ru VK group: https://vk.com/public34691582 Instagram: / zametkielectrika Our Electricians Chat https://t.me/chat_electrikov -------------------- Thank you for your attention. Until next time. Best regards, Dmitry.