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An amorphous metal transformer (AMT) is a type of energy efficient transformer found on electric grids. [1] The magnetic core of this transformer is made with a ferromagnetic amorphous metal . The typical material ( Metglas ) is an alloy of iron with boron , silicon , and phosphorus in the form of thin (e.g. 25 μm) foils rapidly cooled from melt.
Transformers step down transmission voltages, 35 kV or more, down to primary distribution voltages. These are medium voltage circuits, usually 600–35 000 V. [1] From the transformer, power goes to the busbar that can split the distribution power off in multiple directions. The bus distributes power to distribution lines, which fan out to ...
Since the privatisation of Nigeria's generating and distributing segments of electricity, the transmission of electricity remains the cardinal point and key aspect. [41] Among the many challenges the transmission company of Nigeria has continually been confronted are: Infrastructural constraints; Vandalism of transmission lines and equipment;
Electricity generation in Nigeria began in Lagos in 1886 with the use of generators to provide 60 kW. [10] In 1923, tin miners installed a 2 MW plant on the Kwali River; six years later, the Nigerian Electricity Supply Company, a private firm, was established near Jos to manage a hydroelectric plant at Kura to power the mining industry.
For example, an auto transformer that adapts a 1000 VA load rated at 120 volts to a 240 volt supply has an equivalent rating of at least: 1,000 VA (240 V – 120 V) / 240 V = 500 VA. However, the actual rating (shown on the tally plate) must be at least 1000 VA.
Experimental power transformers in the 500–1,000 kVA range have been built with liquid nitrogen or helium cooled superconducting windings, which eliminates winding losses without affecting core losses. [48] [49]
The Port Harcourt Electricity Distribution Company (PHED) [1] is a private electric distributor that provides power for a total of 14 million people in 4 states of Nigeria including Rivers, Bayelsa, Cross River and Akwa Ibom. It first operated as a government-owned enterprise before being privatized in 2013.
An autotransformer does not provide electrical isolation between its windings as an ordinary transformer does; if the neutral side of the input is not at ground voltage, the neutral side of the output will not be either. A failure of the isolation of the windings of an autotransformer can result in full input voltage applied to the output. Also ...
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