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  2. ANSI device numbers - Wikipedia

    en.wikipedia.org/wiki/ANSI_device_numbers

    In electric power systems and industrial automation, ANSI Device Numbers can be used to identify equipment and devices in a system such as relays, circuit breakers, or instruments. The device numbers are enumerated in ANSI / IEEE Standard C37.2 Standard for Electrical Power System Device Function Numbers, Acronyms, and Contact Designations.

  3. Protective relay - Wikipedia

    en.wikipedia.org/wiki/Protective_relay

    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 detected. [1]: 4 The first protective relays were electromagnetic devices ...

  4. Power system protection - Wikipedia

    en.wikipedia.org/wiki/Power_system_protection

    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 ...

  5. Load bank - Wikipedia

    en.wikipedia.org/wiki/Load_bank

    Load bank. An air-cooled load bank, being used for acceptance testing of a 3000 kW standby diesel generator set. This is one of three banks used to load the generator to verify performance on load changes and for factory run-in. A load bank is a piece of electrical test equipment used to simulate an electrical load, to test an electric power ...

  6. Backfeeding - Wikipedia

    en.wikipedia.org/wiki/Backfeeding

    A common source of unintentional backfeeding is an electrical generator (typically a portable generator) that is improperly connected to a building electrical system.A properly installed electrical generator incorporates the use of a transfer switch or generator interlock kit to ensure the incoming electrical service line is disconnected when the generator is providing power to the building.

  7. Numerical relay - Wikipedia

    en.wikipedia.org/wiki/Numerical_relay

    Protective relay. In utility and industrial electric power transmission and distribution systems, a numerical relay is a computer-based system with software-based protection algorithms for the detection of electrical faults. [1] Such relays are also termed as microprocessor type protective relays. They are functional replacements for electro ...