The performance minimum relays used in the MCP pumps  are responsible for sensing any failure of the main circulation pump and transferring information to the reactor performance controller and reactor protection about the appropriate operation of the MCP. The MCPs provide for the cooling of the reactor and the removal of thermal output; consequently, the immediate detection of any change in their operating conditions is of utmost importance. The health monitoring of the circuit breakers of the MCPs does not necessarily provide sufficient information. The dedicated EuroProt+ motor protection devices with the special power minimum detection feature are used to supply the information necessary for reactor protection, which are designed and manufactured to meet  the unique requirements.

Due to the special security requirements, there are three devices allocated to each pump, which are installed on separate relay boards due to their size. They sense currents from 6kV feeder cells and measure voltage from 6kV distribution measuring cells.

Protecta Ltd. was selected to deliver the complete protection system related to the 6 kV reconstruction. In this project, a total of 200 EuroProt+ devices will need to be delivered until mid-2021 adjusted to the annual maintenance schedule of the blocks. As part of engineering services, Protecta Ltd. is responsible for the development, production and configuration work required for the commissioning of the whole system.