Electrical, Home Improvement

Isolation Transformer and Its Different Purposes

A transformer is a tool commonly used to transfer electrical energy from a certain circuit to another circuit by means of inductively tied conductors. These conductors are made up of two or more ferromagnetic coils named as windings. When there are any electrical alterations made in the main winding, this creates a sporadic magnetic field in the core. Thus, it will reproduce a fluctuation that includes the field on both sides of secondary winding. As a result, it provides intermittent electrical energy in the secondary coils. There are various forms of transformers that help transfer electrical power. One popular form is the isolation transformer, which offers different applications and purposes.

An isolation transformer is often used to convey electrical power coming from a source of alternating current (AC) power to a certain device, where the powered device is being isolated from the power source for safety measures. It can also be used to thwart capacitance that enhances the primary and secondary winding linkage causing a higher frequency sound. Normally, a transformer could increase energy voltage level from one stage to another through induction of electrical energy from one winding to another. With the beauty of isolation, the circuits of input and output are secluded from each other and will never be in contact. Isolation transformers provide galvanic isolation that is utilized for protection against electric shock, suppression of electrical noise in various receptive and sensitive gadgets, and transmission of power among two circuits.

This unique transformer is suitably designed to oppose the interference caused by ground loops and to minimize the coupling of the windings through construction that minimizes capacitive coupling. The transformers often utilize unconnected bobbins on both coil windings. However, the windings are only wounded on top of each other with insulation in the middle. Most of them have electrostatic shields between windings that are used for power supplies on sensitive equipment like computers, laboratory gadgets, and other electronic materials.

Typically, any transformer has an isolating function, whether it is used to send power or signals. However, those transformers whose sole purpose is to isolate circuits are usually described as isolation transformers. It has a built-in special insulation placed between primary and secondary windings. It is discernible to hold out a high voltage of a thousand to four thousand volt range.

Their main focus is on capacitive coupling among the two windings. Aside from the capacitance of the primary and secondary windings, they also fasten the AC power from the primary to the secondary winding. Some of the examples of isolated transformers include very small transformers, such as four transformers in a minute dual in-line chip package that are used to isolate high-frequency low-voltage pulse circuits. They are quite expensive compared to conventional transformers.

An isolation transformer offers various functions. Most of these purposes carried out by isolation transformers are often used in different industries and business establishments. Listed below are some of the outstanding roles of isolation transformers.

  1. It can substitute isolation in different circuits. There are industries and establishments that use different applications in isolating the circuits without increasing or decreasing the electric current. Anisolation transformer can separate the primary and secondary windings with a “one-is-to-one” ratio.
  2. It protects people from the danger of electrocution. Custom power transformers facilitate separation of the person from the resource to provide safety. It will unite a vessel to an electric power source. However, it can be done in a manner that the electric wirings will not touch directly to the power line.
  3. Isolation transformers could reduce noise and other kinds of sound. These can prevent any sound or noise created by connecting the signal of the audio amplifier to the speaker output circuit without any connection created between the two, separating the amount produced by the audio amplifier to the piece of module from the amplifier.
  4. It helps isolation of the radio frequency. It is essential to separate the amount generated by a radio frequency on the large devices of the circuit from the transmitter line. Thus, an isolation transformer facilitates the connection of the amount produced by the radio frequency amplifier to the transmitted signals towards the direction of the antenna.
  5. It facilitates direct current (DC) power isolation. Telephone lines often utilize digital information that needs amplifiers on various intervals. Isolation transformers carry out the separation of direct current components from the signal to the control of every amplifier on the line. An isolation transformer can carry out the task in the input and output of each amplifier.

A “one-to-one” ratio of power transformer is often chosen as an isolation transformer when used in electronics testing and servicing for safety purposes. Without this isolation, there might be danger in touching a live part of the circuit. Thus, isolation transformers became an excellent option for most gadgets that require the use of electricity.

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