By virtue of its open-type interfaces and its wide-ranging communication facilities, the SICAM SAS Substation Control and Protection System permits connection of bay control units equipped with the following interfaces: RS422/RS485 or fibre optics. Integration of the efficient state-of-the-art SIPROTEC 4 generation of protection and control units is especially simple, as attention has been paid to uniformity of design in their development.

The SIPROTEC 4 family is an innovative product series of numerical protective and control devices with open communication interfaces for remote control and remote parameter settings, ergonomically designed user interface and highly flexible functionality. The devices utilize numerical measuring techniques. Completely numerical signal processing offers high measurement accuracy and long-term consistency as well as the reliable handling of harmonics and transients. Digital filter techniques and dynamic stabilization of measured values endure the highest degree of security in determining the protective responses. Device errors are recognized and indicated rapidly by integrated self-monitoring routines. Failure of protection during a network fault is therefore almost entirely excluded.