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2. Power system protection - Wikipedia

   en.wikipedia.org/wiki/Power_system_protection

   Simplicity: Devices must minimize protection circuitry and equipment. Reliability: Dependability vs Security. There are two aspects of reliable operation of protection systems: dependability and security. [8] Dependability is the ability of the protection system to operate when called upon to remove a faulted element from the power system.

3. Protective relay - Wikipedia

   en.wikipedia.org/wiki/Protective_relay

   The theory and application of these protective devices is an important part of the education of a power engineer who specializes in power system protection. The need to act quickly to protect circuits and equipment often requires protective relays to respond and trip a breaker within a few thousandths of a second.

4. 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.

5. Surge protector - Wikipedia

   en.wikipedia.org/wiki/Surge_protector

   Surge protection device (SPD) for installation in a low-voltage distribution system. A surge protector, spike suppressor, surge suppressor, surge diverter, [1] surge protection device (SPD), transient voltage suppressor (TVS) or transient voltage surge suppressor (TVSS) is an appliance or device intended to protect electrical devices in alternating current (AC) circuits from voltage spikes ...

6. Network protector - Wikipedia

   en.wikipedia.org/wiki/Network_protector

   A network protector is a type of electric protective device used in electricity distribution systems. The network protector automatically disconnect its associated distribution transformer from the secondary network when the power starts flowing in reverse direction.

7. Switchgear - Wikipedia

   en.wikipedia.org/wiki/Switchgear

   One of the basic functions of switchgear is protection, which is interruption of short-circuit and overload fault currents while maintaining service to unaffected circuits. Switchgear also provides isolation of circuits from power supplies. Switchgear is further used to enhance system availability by allowing more than one source to feed a load.