Line differential protection terminal
REL551 1MRK002480-AE Line differential protection terminal
REL551 1MRK002480-AE Line differential protection terminal
REL551 1MRK002480-AE
The REL551 line differential protection terminal is the basic unit for distribution, subtransmission and transmission line differential protection applications and forms a part of a PANORAMA Station Automation. The PANORAMA Station Automation concept includes a complete range of single-function units and multi-functional terminals, Substation Monitoring System (SMS) and Substation Control System (SCS). The units in the PANORAMA concept are available as stand alone relays/terminals or as building blocks in a total power network management system.
All currents are Fourier filtered in order to extract the sine and cosine components. The six components, two per phase, are included in a message that is transmitted every 5 ms to the remote terminal over a synchronous 56/64 kbit/s data channel. Also included in the message is information for differential function supervision, CT saturation detection,synchronisation of terminals, transfer trip signals etc.
REL551 1MRK002480-AE Line differential protection terminal
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