Isolation transformers are a type of transformer, designed to have primary input and secondary output windings. Both these windings are separated with the help of an electric insulation barrier. Therefore, in case of any fault, the power is not transferred to next stage.
Isolation Transformer converts or transformers the current or AC voltage from one level to another level. It does it's the principle of isolating different sections of electrical systems to stop current flow. The transformer transfers electrical power from a source of alternating current energy to a device. To ensure safety measure, the powered device is isolated from the power source. In this case, there is no direct conduction path, still the energy is exchanged.
Further, the isolation transformer features to prevent the transmission of the DC component in signals from one circuit to another. However, it allows AC components in signals to pass.
Where to use?
Isolation transformers are at several places to meet different demands.
|INPUT||SINGLE / THREE PHASE APPLICATION|
|RATING||FROM 0.5 TO 750 KVA|
|REGULATION||BETTER THAN 3% (APPROX.)|
|CONNECTION||DELTA / STAR FRO 3 PHASE|
|OPERATING POWER FACTOR||-0.75 TO + 0.75 (0.75 LAGGING TO LEADING)|
|DIELECTRIC STRENGTH||2500 V FOR 60 SEC|
|RESISTANCE||BETTER THAN 1000 MEGA OHMS|
|COUPLING CAPACITANCE||LESS THAN 0.1 pf|
|NOISE REJECTION|| a) ISOLATION
- UP TO 100 dB
b) ULTRA ISOLATION - MORE THAN 130 db