Protective relays Easun Reyrolle B33X2 Relay has an efficient performance in highly dependable power transmission and industry protection applications. It has been designed carefully, offering reliable protection, control and monitoring to have a stable and safe system. The B33X2 relay has a reputation of excellence in the area of durability and accuracy, and is commonly employed in electrical panels, substations, and automation settings where the reliability of performance must be present.