Paper URL: https://www.ijtsrd.com/engineering/electrical-engineering/38483/development-and-performance-evaluation-of-an-intelligent-electric-power-switching-system/popoola-a-i
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The research work deal with automatic control system to switch ON or add OFF predetermined energy source. The automatic system ON or add OFF consists of both AC and DC voltage sensor, uninterrupted DC power supply, relay switches, generator choke control, microcontroller and indicators. The voltage sensors were used to determine the voltage availability from the various sources National grid, inverter and generator. The uninterrupted dc power supply was used to drive the whole circuit. The choke control was also in cooperated to start the generator which consists of solenoid with solenoid driver. The high power relay switching unit would be trigger due to the information processed by microcontroller this processed information would be transmitted to the appropriate relay for action. The indicators were used to specify the voltage sources available. All these units were wired together. The time delay is determined by time of operation or decision by microcontroller, make near zero delay in switching. When switching to national grid and generator, the load was connected but for the inverter trigger, few important loads were loaded to it. The delay time noted was around 85ms, charge from national grid to generator but when inverter is place in between the national grid and the generator the delay time is near zero.
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Night Before Launch of Mars-Bound MAVEN Spacecraft
A full moon rises behind the United Launch Alliance Atlas V rocket with NASA’s Mars Atmosphere and Volatile EvolutioN (MAVEN) spacecraft onboard at the Cape Canaveral Air Force Station Space Launch Complex 41, Cape Canaveral, Fla. on Nov. 17, 2013.
MAVEN…
