Directional Overcurrent RMSD7921 / 7912
The RMSD7900 relays provide directional overcurrent protection for three-phase networks.  They have adjustable characteristic angles and two different overcurrent elements; a low-set with an IDMT curve and a high-set with a definite time characteristic.  Two variants are available:

RMSD7921: Protection of loops of rapid separation or “islanding” of networks having several sources in parallel. 
ANSI function: 67 

RMSD7912: Directional earth fault protection on looped or multiple earthing points networks. 
ANSI function: 67N

These relays are part of the PROCOM range, offering multi-function protection and communication via Modbus (RS485).  A full brochure is available on the PROCOM range page