In a conventional substation protection and control scheme, protection is distributed or “de-centralized” among multiple Numerical Protection Relays. These devices typically operate independently, with minimal communication and coordination between them. Generator protection covers: phase-to-phase short circuits in stator windings, stator ground faults, inter-turn short circuits in stator windings, external short circuits, symmetrical overload, stator overvoltage, single- and double-point grounding in the excitation circuit, and loss of excitation. Employ the SEL-TMU for remote data acquisition in substations with Time-Domain Link (TiDL®) technology systems. Provide high-speed transformer diferential protection for up to five terminals as well as advanced monitoring, metering, automation, and. Protective Relays - Technical Seminar Nov 2016 - Copyright: IEEE 2 Abstract: Protective relays and devices have been developed over 100 years ago to provide “lastline”of defense for the electrical systems. They are intended to quickly identify a fault and isolate it so the balance of the system. IEC 61850 station bus and process bus solutions have become popular in modern digital substations. Within a substation, various equipment—such as switchgear, transformers, power system protection, communication devices, voltage regulators, and energy meters—work together to ensure the.