MainsPro from ComAp a.s. (EU) is a protection relay for MAINS/Grid connected applications including generator sets, cogeneration, micro turbines or renewable energy sources such as photovoltaic plants or wind turbines. It provides adjustable voltage, frequency and loss of MAINS protections to safeguard both the distribution network and the generators. Relay has under & over voltage/frequency and voltage asymmetry protections. Other In-built features & protections are vector shift, phase sequence supervision, ROCOF filter, positive/negative sequence & Breaker failure. Relay is suitable for Door mount or DIN Rail installation and it can be configured through front panel. Simple wiring with detachable connector & easy programming makes Relay user friendly. Last 5 trip records provides cause of trip. Remote Binary communication, watchdog relay output & resistance to frequency jumps features are very useful. For security of settings, integrated mechanical lock is provided. MainsPro complies with IEC 60255, G83, G59/3, UL508, CEI 0-21, IEn NR 005/2012, VDE V 0126-1-1 and VDE-AR-N 4105 standards.