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In other words, it is the opposite to a flashing light where the total duration of darkness is longer than the duration of light. It has the appearance of flashing off, rather than flashing on. Like a flashing light, it can be used for a single occulting light that exhibits only a single period of darkness or the periods of darkness can be ...
Three-brush dynamo charging circuit A third-brush dynamo was a type of dynamo , an electrical generator , formerly used for battery charging on motor vehicles . It was superseded, first by a two-brush dynamo equipped with an external voltage regulator , and later by an alternator .
Fueled with plutonium-238, two parallel lead telluride thermocouple generators produced an initial maximum of approximately 30 watts of electricity. [15] Nimbus 3 used a SNAP-19B with the recovered fuel from the Nimbus-B1 attempt. [16] SNAP-19's powered the Pioneer 10 and Pioneer 11 missions. [17]
Onan [a] was a figure detailed in the Book of Genesis chapter 38, [1] as the second son of Judah who married the daughter of Shuah the Canaanite.
The end of train device (ETD), sometimes referred to as an EOT, flashing rear-end device (FRED) or sense and braking unit (SBU) is an electronic device mounted on the end of freight trains in replacement of a caboose.
The sequence of events is similar for manual or automatic synchronization. The generator is brought up to approximate synchronous speed by supplying more energy to its shaft - for example, opening the valves on a steam turbine, opening the gates on a hydraulic turbine, or increasing the fuel rack setting on a diesel engine.
The three general categories of modern UPS systems are on-line, line-interactive and standby: [2] [3] [4] An online UPS uses a "double conversion" method of accepting AC input, rectifying to DC for passing through the rechargeable battery (or battery strings), then inverting back to 120 V/230 V AC for powering the protected equipment.
Motor–generator sets were often used to provide the high-current D.C. power for carbon arc lamps in large movie projectors in the 1950-60's era, before the carbon electrode arc light was replaced with modern xenon arc lamp projection systems (starting in 1963 in the U.S.).
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