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Ultra Isolation Transformer Testing Unit


Ketki P. Gogate , S.V.I.T. chincholi, nashik.; Arvind P.Hatkar, S.V.I.T. Chincholi, Nashik


Ultra Isolation, Transformer Testing Unit


Many high end electronic equipments, rapidly expanding computer control systems and information networks are sensitive to spikes, surges and line transients. Due to power electronic circuits, welders, variable speed drives and SCR controls used in computers and many other electrical systems, electrical noise is introduced in power distribution system which leads to corruption of clean power. The electronic systems must be protected from high voltage surges and made immune to noise. If they are not suppressed they can cause memory loss in computer, component failure, scrambled data transmission etc. For AC systems, electrical noise is a distortion of the normal sine wave. Some effects noise has on electrical systems are data loss, computer lock-up, equipment malfunction, and occasionally destruction .These impulses are of very short duration of the order of the order of a microsecond to very few milliseconds. But their amplitude can range from hundreds to thousands of volts. They can be caused by lightning, mains line switching air conditioning or switching of any heavy duty machinery. Therefore, noise attenuation devices are a necessity. Although it is impossible to totally eliminate electrical noise, it is possible to drastically reduce it to tolerable levels. Electrical noise attenuation devices, such as, TVSS (Transient Voltage Surge Suppression), noise filters and shielded isolation transformers reduce electrical noise to safe levels. The objective of this project is to design a testing unit for ultra-isolation transformer for measuring its common mode noise attenuation capability. Noise attenuation is expressed as a ratio of the output transient energy (Vto) to the input transient energy (Vti), or by decibels (dB). The Common mode noise rejection should be about -100 dB. If this condition is satisfied, then we can conclude that the ultra-isolation transformer under test is able to eliminate common mode noise providing electrostatic shielding and protection against spikes, surges and transient noise.

Other Details

Paper ID: IJSRDV3I41192
Published in: Volume : 3, Issue : 4
Publication Date: 01/07/2015
Page(s): 3371-3373

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