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TODAY IN HISTORY

    FIRST U.S. ELECTRIC AUTO
    July 27, 1888 - Boston usa

    The first U.S. electric automobile, designed by Philip W. Pratt, was demonstrated in Boston, a tricycle powered by six Electrical Accumulator Company cells, weighing 90 pounds. Pratt held a number of patents as an inventor, the most significant being the first practical automatic fire sprinkler system (1872). His other inventions included furniture pads for chair leg tips (1878), a spring toy gun (1892), glazed target for vacuum-tipped toy arrows (1890), crutch (1901) and a bath mitten (1889). Some years earlier than Pratt's tricycle, in 1874, a three-wheeled electric vehicle had been built earlier by Sir David Salomons in Tunbridge Wells, England. It was a 1 h.p. device powered by Bunsen cells. By 1895, the first British manufacturer of electric cars was Acme & Immisch Electrical Works at Chalk Farm, London.

    TRANSATLANTIC CABLE SUCCESS
    July 27, 1866 - North America and Europe

    Cyrus W. Field finally succeeded, after two failures, in laying the first underwater telegraph cable 1,686 miles long across the Atlantic Ocean between North America and Europe. Massachusetts merchant and financier Cyrus W. Field first proposed laying a 2,000-mile copper cable along the ocean bottom from Newfoundland to Ireland in 1854, but the first three attempts ended in broken cables and failure. Field's persistence finally paid off in July 1866, when the Great Eastern, the largest ship then afloat, successfully laid the cable along the level, sandy bottom of the North Atlantic.

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Electric Transformers :

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Do you want to know more about electric transformers? Every home and business is affected by transformers. Businesses use them to get the right power they need. Transformers are use in all high tech equipment. Do you want to know the different types?

ARTICLE CONTENT :

The role of electrical transformers is to switch voltage from one value to another; normally from higher to lower voltage or vice versa. They consist of two sets of coils or windings that are connected to a ferromagnetic core. There are two types of coils?the primary and secondary conductors.

A changing current in the primary conductor produces alternating magnetic fields in the core, which in turn multiples the fields and couples most of the flux with the secondary conductor. This incites the alternating voltage or EMF in each of the secondary conductor.

The cores can be customized as toroidal or laminated. The toroidal has several advantages such as producing low magnetic leakage, close flux path, low noise and smaller core size, lighter and more efficient. They have copper wires wrapped around a cylindrical core preventing leakage of magnetic flux. The magnetic flux is not very influential on other components.

On the other hand, the laminated core is composed of sheets of magnetic material that is insulated from one another with a non-conducting material such as varnish, producing a core that decreases electrical losses.

Electrical transformers can be configured in two ways. You can choose single-phase or three-phase. In switching the voltage level, the principle of magnetic induction between coils is to transfer voltage between coils from the electricity that flows through them. The transformers are passive devices that initiates the transformation of alternating current or AC electrical energy from one circuit into another through electromagnetic induction.

Many homes and businesses have transformers to transfer electricity from power plants. The voltage of the transformers at the power plants is normally high. As they reached the substation, the voltage is lowered. When they reached smaller transformer, the voltage is lowered again. The adjustment in voltage is a continuous process, which only stops when the power reaches the useable level.

The inward voltage of electrical transformers is very crucial. There are three general frequencies that are easy to obtain. These are the 50 Hertz, 60 hertz, and 400 hertz. If you are in Europe, the standard power is 50 hertz. In North America, the average power is 60 hertz. The 400 hertz is set aside for high-capacity purposes like aerospace technologies.

In estimating transformers, it is important to consider power specifications such as highest ratings of the next current, the secondary current ratings, highest power rating, the voltage rating, output type and output choices, such as AC or DC.

Transformers come in several types. There are power transformers, current transformers, step down transformers, low voltage transformers, distribution transformer, instrument transformers, general purpose transformers and automatic transformers.

The power transformers have several configurations based on segments and links. The distribution transformer decrease the primary voltage of the electric distribution system so that it can be used by customer. Auto electrical transformers are smaller in size, weigh less and have better voltage stability as well as overload tolerance.

The manner by which the electrical transformers function has changed. They made life easier for people as they transfer power efficient and more economical. The electricity that is available in your house passes through many different transformers before it is usable as a low voltage.

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  • Relectric
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  • November 30, 2014Date Added :
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