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2. Power system protection - Wikipedia

   en.wikipedia.org/wiki/Power_system_protection

   Power system protection is a branch of electrical power engineering that deals with the protection of electrical power systems from faults [citation needed] through the disconnection of faulted parts from the rest of the electrical network. The objective of a protection scheme is to keep the power system stable by isolating only the components ...

3. Protective relay - Wikipedia

   en.wikipedia.org/wiki/Protective_relay

   Electromechanical protective relays at a hydroelectric generating plant. The relays are in round glass cases. The rectangular devices are test connection blocks, used for testing and isolation of instrument transformer circuits. In electrical engineering, a protective relay is a relay device designed to trip a circuit breaker when a fault is ...

4. Intelligent electronic device - Wikipedia

   en.wikipedia.org/wiki/Intelligent_electronic_device

   Protective relay is an example of an intelligent electronic device. In the electric power industry, an intelligent electronic device (IED) is an integrated microprocessor-based controller of power system equipment, such as circuit breakers, transformers and capacitor banks. [1]

5. Network protector - Wikipedia

   en.wikipedia.org/wiki/Network_protector

   Grid units will always be energized on the top side from the many other units tied into the grid. A spot network is 2 or more transformers dedicated to a single customer. The grid feeds multiple customers. A network protector has a circuit breaker set of contacts and a controlling protection relay. The components are enclosed in a protective ...

6. Schweitzer Engineering Laboratories - Wikipedia

   en.wikipedia.org/wiki/Schweitzer_Engineering...

   Founded in 1982 by Edmund O. Schweitzer III, SEL shipped the world's first digital protective relay. [1] Presently, the company designs and manufactures embedded system products for protecting, monitoring, control, and metering of electric power systems.

7. Power-system automation - Wikipedia

   en.wikipedia.org/wiki/Power-system_automation

   A protective relay is an IED designed to sense power-system disturbances and automatically perform control actions on the I&C system and the power system to protect personnel and equipment. The relay has local termination so that the copper conductors for each contact do not have to be routed to a central termination panel associated with RTU.