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2. Power outage - Wikipedia

   en.wikipedia.org/wiki/Power_outage

   Power outages are categorized into three different phenomena, relating to the duration and effect of the outage: A transient fault is a loss of power typically caused by a fault on a power line, e.g. a short circuit or flashover. Power is automatically restored once the fault is cleared. A brownout is a drop in voltage in an electrical power ...

3. Electrical disruptions caused by squirrels - Wikipedia

   en.wikipedia.org/wiki/Electrical_disruptions...

   In 1987 a 90-minute loss of power to Nasdaq's automated trading computer, caused by a squirrel, affected twenty million trades. [9] [17] [18] Nasdaq was shut down for about 30 minutes again in 2014 by a squirrel-induced power outage.

4. Northeast blackout of 2003 - Wikipedia

   en.wikipedia.org/wiki/Northeast_blackout_of_2003

   Once triggered, the bug stalled FirstEnergy's control room alarm system for over an hour. System operators were unaware of the malfunction. The failure deprived them of both audio and visual alerts for important changes in system state. [14] [15] Unprocessed events queued up after the alarm system failure and the primary server failed within 30 ...

5. Electrical fault - Wikipedia

   en.wikipedia.org/wiki/Electrical_fault

   In an electric power system, a fault or fault current is any abnormal electric current. For example, a short circuit is a fault in which a live wire touches a neutral or ground wire. An open-circuit fault occurs if a circuit is interrupted by a failure of a current-carrying wire (phase or neutral) or a blown fuse or circuit breaker.

6. Building automation - Wikipedia

   en.wikipedia.org/wiki/Building_automation

   Modern systems typically use power-over-Ethernet (which can operate a pan-tilt-zoom camera and other devices up to 30–90 watts) which is capable of charging such batteries and keeps wireless networks free for genuinely wireless applications, such as backup communication in outage. Fire alarm panels and their related smoke alarm systems are ...

7. Fire alarm system - Wikipedia

   en.wikipedia.org/wiki/Fire_alarm_system

   A fire alarm system is a building system designed to detect, alert occupants, ... are used to supply energy during a primary power failure. The batteries can be ...