PR512 are self-supplied relays and ensure complete protection of the installation without an auxiliary power supply. They are used as switchboard protection units and provide protection of the medium voltage ABB circuit-breakers. PR512 is available in three solutions.
- PR512/P (50-51 protections)
- PR512/P (50-51-50N-51N protections)
- PR512/PD (50-51-50N-51N protections with dialogue).