What is the difference between an isolation transformer and an ordinary transformer? Isolation transformers are different from ordinary transformers in terms of winding methods. Isolation transformers can provide better safety protection.
1. What is an isolation transformer
There are two types of isolation transformers: single-phase isolation transformers and 3 phase isolation transformers.
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.
An isolation transformer is used in applications where it is beneficial to isolate the powered circuit from its source. For example, many high voltage circuits use an isolation transformer as part of their design; this prevents someone from accidentally touching two different points on the circuit and receiving an electric shock. Isolation transformers can also be used when you need a clean signal for audio equipment such as microphones or musical instruments.
Isolation transformers are made with identical primary and secondary windings that are magnetically coupled but not electrically connected, providing electrical isolation between the source and load.
2. What is an ordinary transformer
The ordinary transformer we generally refer to is the autotransformer.
An ordinary transformer works on A.C. only. It used to increase or decrease the voltage from a source. It works on the principle of electromagnetic induction.
A ordinary transformer is a static device which transfers electrical energy from one circuit to another at the same frequency but different voltage. It works on the principle of electromagnetic induction, i.e., the electromotive force is induced in the closed circuit due to the variable magnetic field around it.
3. What is the difference between an isolation transformer and an ordinary transformer?
n an ordinary transformer, the primary and secondary coils are wound on the same core.
In an ordinary transformer, the primary and secondary coils are wound on the same core. This means that the magnetic fields created by each coil are closely related. As a result, there is a significant amount of mutual inductance present between them—enough for electricity to flow from one winding to another even if no electrical connection exists between them.
In an isolation transformer, however, this isn’t true: The primary and secondary windings have no magnetically coupled relationship with each other. They’re electrically connected through an air gap in their cores but aren’t magnetically linked at all; they can be separated by as much distance as you want without affecting each other in any way (unless you put something like a piece of iron between them).
An isolation transformer uses identical primary and secondary windings that are not electrically connected.
An isolation transformer uses identical primary and secondary windings that are not electrically connected. Therefore, it is possible to use an isolation transformer in circuits where there are two or more voltages between the source of power and the load. This is not possible with ordinary transformers.
The primary and secondary windings of an isolation transformer can be wound on the same core or on separate cores, though this is rare. With this type of configuration, if one winding gets energized by accident due to a fault in the circuit being powered by the transformer, both windings will be at full voltage but there will be no current flow through them since they are magnetically coupled but not electrically connected.
The above is the difference between isolation transformer and ordinary transformer