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A transformer or autotransformer can be used; (auto)transformers are inherently reversible, so the same transformer can be used to step the voltage up, or step it down by the same ratio. Lighter and smaller devices can be made using electronic circuitry; reducing the voltage electronically is simpler and cheaper than increasing it.
Most of the Americas use 60 Hz AC, the 120/240 volt split-phase system domestically and three phase for larger installations. North American transformers usually power homes at 240 volts, similar to Europe's 230 volts. It is the split-phase that allows use of 120 volts in the home. Japan's utility frequencies are 50 Hz and 60 Hz.
High-voltage substation in Kaanaa, Pori, Finland Substation in Russia. Substations typically serve at least one of the following purposes: [7] Increasing the voltage produced by electric power generation for efficient transmission over long distances, using step-up transformers [8] [9] Interconnection of different power grids [8]
A "transformer bank", widely used in North America: three single-phase transformers connected to make a 3-phase transformer. The low-voltage secondary windings are attached to three or four terminals on the transformer's side. In North American residences and small businesses, the secondary is often the split-phase 120/240-volt system. The 240 ...
With the success of the plant the Nunns started installing similar systems at their other mining operations. In 1896 the Ames plant was rebuilt with a new two-phase system with new generators and induction motors along with step-up transformers to boost the power to 10,000 volts for longer distance transmission. [6] The water supply was also ...
On the three secondary terminals, the center tap is grounded with a short strap to the transformer case. A split-phase or single-phase three-wire system is a type of single-phase electric power distribution. It is the alternating current (AC) equivalent of the original Edison Machine Works three-wire direct-current system. Its primary advantage ...
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