Ultra Isolation Transformer comes with a very special construction all types of electrical noise predominantly common mode noise is eliminated by this. Since it isolates primary and secondary and separates neutral to the ground on the secondary side, it can be used to create separately derived source to combat the current loops.
High isolating materials with special shielding techniques attenuate common mode noise as well minimise transverse mode noise.
They are specially designed for sensitive critical equipment like computers & peripherals, medical instrumentation, digital communication telemetry systems, CNC Machines etc. and stopping such disturbances generated by the noisy equipment load from being injected into the power line.
An isolation transformer is often built with special insulation between primary and secondary and is tested, specified and marked to withstand a high voltage between windings, typically in 1000-volt to 4000-volt range.