Legacy products

REL316*4 numerical line protection scheme is designed for the high-speed discriminative protection of lines and cables in distribution & transmission systems.

The REL 350 is a numerical segregated phase comparison transmission line protection system for high-speed tripping for any transmission line application.

The REL 352 provides high-speed relaying which is suitable for application to any voltage level. It can also be used for three-terminal applications. Learn more

The REL 356 offers high-speed relaying which is suitable for application to any voltage level. It can also be used for three-terminal applications. Read more!

The REL 551 terminal is used for the protection, control, and monitoring of overhead lines and cables. It provides for one-, two-, and/or three-pole tripping.

REL551 ver. 2.5 is an open terminal platform with extensive configuration possibilities and expandable hardware design to meet specific user requirements.

The main purpose of the REL 561 ver. 2.3 terminal is the protection, control, and monitoring of overhead lines and cables in networks. Click here to learn more!

The REL561 ver. 2.5 terminal is especially suitable for series compensated networks. It provides one-, two-, and/or three-pole tripping in networks. Learn More!