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Ultra Isolation Transformer

In order to know about Isolation Transformers and Ultra Isolation Transformers, you need to understand what a transformer is and what purpose it serves. A transformer, simply stated, is a device that converts one voltage to another. There are of course different types of transformers.

Some transformers have single coil with various fixed or movable tappings and they are known as auto-transformers. But these types of non-isolated transformers are becoming obsolete and their use is now confined to equipments like voltage regulators/voltage stabilizers.

Today transformers with two coils are the ones rampantly used. These two coils are isolated from each other with lamination materials which are not conductive. There is a primary coil that serves as input and the other is a secondary coil that serves as output.

Generally, no direct electrical path (connection) between the two coils is provided. The primary coil of a transformer converts / transforms the electrical power into magnetic field and the secondary coil in turn converts this magnetic field into electrical power.

Summing up, an Isolation Transformer may be defines as a transformer with two coils that are not directly connected through a conductor. Now let us go on to understand what Ultra Isolation Transformers are.

Though the primary and secondary coils are separated, researches have revealed that the differential noise can magnetically couple from the primary to the secondary of an isolation transformer. The excessive capacitance is likely to couple AC current from the primary to the secondary.

To preempt this, an electrostatic shield, more commonly called as Faraday Shield, is placed between the primary and the secondary. This drastically reduces the coupling of common-mode noise. Isolation transformers incorporating Faraday Shield are called Ultra Isolation Transformers.

The Faraday Shield that isolates the primary and secondary is connected to earth ground to facilitate filtering of spikes or surges. The secondary of an isolation transformer is deliberately kept floating from the ground to avoid the earth bonding. Practically, the input phase, neutral and earth are never connected to the output.

The commercial type Isolation Transformers have one leg of the secondary coil connected to the ground. This forms a new neutral and helps to eliminate common mode noise and differential ground noise.

These high frequency noises can interfere with Digital-Electronic equipment causing data corruption, erratic behavior, loss of memory etc. It is to be noted that the Noise cut-off transformer eliminates such noises and attenuates the spikes to negligible values, providing complete protection against all electrical disturbances.

It needs to be mentioned that when more than one shielded isolation transformer is installed between the source and the load, there will be a cascading effect to appreciably improve power quality.

We are living in an electronic age and dealing with highly sensitive equipment and gadgets. Therefore Ultra Isolation transformers with electrostatic shields are widely used to protect these sophisticated and costly equipments.

The Ultra Isolation Transformers protect the Computers, CNC Machines and Telecommunications equipment from possible damage due to electrical noise, spikes etc. Ultra Isolation Transformers are particularly used hospitals to protect patients hooked up to monitoring instruments that are powered by utility mains.