protection against ground-fault
31Extra-low voltage — IEC voltage range AC DC defining risk High voltage (supply system) > 1000 Vrms > 1500 V electrical arcing Low voltage (supply system) 25–1000 Vrms 60–1500 V electrical shock Extra low voltage (supply system) < 25 V …
32thunderstorm — /thun deuhr stawrm /, n. a transient storm of lightning and thunder, usually with rain and gusty winds, sometimes with hail or snow, produced by cumulonimbus clouds. Also called electrical storm. [1645 55; THUNDER + STORM] * * * Violent, short… …
33Health effects arising from the September 11 attacks — There has been growing concern over the health effects of the September 11, 2001 attacks in the Financial District of Lower Manhattan. Within seconds of the collapse of the twin towers and Building 7 of the World Trade Center, pulverized building …
34insurance — /in shoor euhns, sherr /, n. 1. the act, system, or business of insuring property, life, one s person, etc., against loss or harm arising in specified contingencies, as fire, accident, death, disablement, or the like, in consideration of a… …
35Germany — • History divided by time periods, beginning with before 1556 Catholic Encyclopedia. Kevin Knight. 2006. Germany Germany † …
36Digital protective relay — In electrical engineering of power systems, a digital protective relay uses a microcontroller with software based protection algorithms for the detection of electrical faults. Such relays are also termed as microprocessor type protective relays.… …
37Agriculture and Food Supplies — ▪ 2007 Introduction Bird flu reached Europe and Africa, and concerns over BSE continued to disrupt trade in beef. An international vault for seeds was under construction on an Arctic island. Stocks of important food fish species were reported… …
38Mains electricity — A table lamp connected to a wall socket (the mains). Mains is the general purpose alternating current (AC) electric power supply. In the US, electric power is referred to by several names including household power, household electricity,… …
39NEMA connector — Twist lock connector redirects here. For the device used in intermodal shipping, see Twistlock. Ungrounded and grounded power plugs …
40Axis naval activity in Australian waters — Although Australia was remote from the main battlefronts, there was considerable Axis naval activity in Australian waters during World War II. A total of 54 German and Japanese warships and submarines entered Australian waters between 1940 and… …
