Isolation transformer

Isolation transformer

Device used to physically isolate parts of the electrical network, it filters electrical noise and prevents the propagation of malfunctions.

Transformers are electromagnetic devices which transform alternating current (AC) electrical energy from primary to secondary side. The energy is transformed with equal frequency and approximately equal power by means of the transformer core magnetic field. Thus they provide galvanic isolation in the electrical system. The isolation transformers operate in the same way as other transformer types. But the main task is to provide the galvanic isolation in the electrical system. 

The isolation transformers are used in many electrical devices as computers, measurement devices or specific industry power electronic devices.

It is very important to use isolating
transformers when an oscilloscope 
measures signals in an electrical circuit
which is not galvanically isolated from 
the network. Because the current circuit
can be closed (short-circuited) between
oscilloscope common point and grounding.

The main purpose of the isolation transformer
is safety and protection of electronic components
and the persons against electrical shock. 

It physically separates the power supplying from
primary side and a secondary side circuit connected
to electronic components and grounded metal parts which are in contact with the person. Basically, the transformer secondary side is isolated from the grounding.



Isolation Transformer

Application of Isolation Transformer

There is also some special application of isolating transformers, such us pulse transformers which transmit rectangular pulse signals and provide the electrical isolation. This type is suitable in some computer network designs.

Series from this page
Gamme Naïade
One phase galvanic isolation transformer
Gamme Triton
Three phase galvanic isolation tranformer
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