Due to a massive attack on the energy infrastructure, the volume of forecasted measures to limit electricity consumption has been forcibly increased today. Hourly outages have been implemented in all regions of Ukraine, covering 2.5 to 3 shifts simultaneously.
This is reported by Rivne24

Throughout the day, power limitation schedules will also be in effect for industrial enterprises and businesses in all regions.
To find out your shift in the city of Rivne, you can go here, and for the shift in the region — here.
“Please limit the use of high-power electrical appliances as much as possible. If possible, move energy-intensive processes to nighttime hours — after 10:00 PM,” the message from Rivneoblenergo states.