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Isolation transformer

An isolation transformer is a transformer designed to provide magnetic or flux coupling between one or more pairs of isolated circuits, without introducing significant coupling of low frequency signals between them, such as either significant conductive or electrostatic coupling. Electronic circuits often require a transformer for direct current isolation, voltage conversion, or as a filter element. Isolation is required between a source of alternating current power and sensitive electronic components, such as logic circuitry, to prevent electronic system malfunctions from EMP induced upset and/or burnout of the electronic components arising from EMP sources such as a nuclear detonation. Isolation circuits and filter circuits are often used in devices connected to transmission lines. The transmission lines carry a signal to the devices or away from the devices. Isolation transformers are typically used in power supplies of consumer electronic goods, such as personal computer systems, to isolate the user from the high voltage and current levels of AC power as required by regulatory agencies. These transformers generally are formed by a magnetic core member and a bobbin member. Around the bobbin there are wound one or more windings.

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