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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 .
The digital/numeric relay was invented by George Rockefeller. [2] George conceived of it in his Master's Thesis in 1967–68 at Newark College of Engineering. [3] He published his seminal paper Fault Protection with a Digital Computer [4] in 1969. Westinghouse developed the first digital relay with the Prodar 70 [5] being developed between 1969 ...
The 1969 European Athletics Championships were the ninth European Athletics Championships which were held from 16–21 September 1969 at the Georgios Karaiskakis Stadium in Piraeus, Greece. New at these championships were the women's 1500 metres and the women's 4×400 metres relay event.
The radio set is a mobile terminal that can transmit up to 40 miles (64 km) straight line-of-sight at up to 1 watt, using a traveling wave tube amplifier, or 96 miles (154 km) in tropospheric scatter at up to 1 kilowatt, using a tunable klystron amplifier, at a frequency range of 4.4 to 5 gigahertz and 1.2 to 2.2 gigahertz.
Due to the success of the Repco-Holden V8, Holden enlisted Repco to carry out the development work (on the dynamometer only, according to Holden Dealer Team boss Harry Firth) on Holden's 308 engine for its Torana SL/R 5000 that was released in 1974. Firth believed that developing the engine on the dyno and not on the race track saw continual ...
There have been 8 reports of made-in-China alarms sold by HSN nationwide and online not sounding in response to smoke.
The Shaoshan 4 (Chinese: 韶山4) is a type of electric locomotive used on the People's Republic of China's national railway system. This locomotive was built by the Zhuzhou Electric Locomotive Works. The power supply was industrial-frequency single-phase AC, and the axle arrangement Bo′Bo′+Bo′Bo′. [1]
Relay 1 was the first satellite to broadcast television from the United States to Japan. The first broadcast during orbit 2677 (1963-11-22, 2027:42-2048 (GMT), or 1:27 pm Dallas time) was to be a prerecorded address from the president of the United States to the Japanese people, but was instead the announcement of the John F. Kennedy assassination.
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