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Surplus Record is a business directory of surplus, new, and used machine tools, machinery, and industrial equipment in the United States. It was founded in 1924 by Thomas P. Scanlan. The monthly directory, which is hundreds of pages long, has been referred to as "the bible of the used and surplus capital equipment industry". [1]
An isolation transformer is a transformer used to transfer electrical power from a source of alternating current (AC) power to some equipment or device while isolating the powered device from the power source, usually for safety reasons or to reduce transients and harmonics. [1]
Transformers are probably the most common means of galvanic isolation. They are almost universally used in power supplies because they are a mature technology that can carry significant power. They are also used to isolate data signals in Ethernet over twisted pair. [3] Transformers couple by magnetic flux.
The consequences of a two- or three-phase fault between the generator and the first circuit breaker are therefore much more serious and often result in severe damage to the busbars and nearby equipment. Isolated-phase bus is made in ratings from 3000 amperes to 45,000 amperes, and rated for voltages from 5000 volts up to about 35,000 volts.
Virginia Transformer Corp (VTC) is the fourth largest power transformer manufacturer in North America, [citation needed] the largest US-owned. [1] It was established in 1971 to provide power transformers to the Appalachian mining industry. [1] Since then it has expanded to provide transformers across North America.
A single-phase, three-winding converter transformer. The converter transformers step up the voltage of the AC supply network. Using a star-to-delta or "wye-delta" connection of the transformer windings, the converter can operate with 12 pulses for each cycle in the AC supply, which eliminates numerous harmonic current components. The insulation ...
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