Technically any transformer that has no direct current path between its primary & secondary windings provides isolation from any kind of leakage in Current, SpikesSurges produced in the system. Provision of electrostatic shield in between primary & secondary winding depends upon its construction, specification & performance characteristics.
Dry type transformers are suitable for indoor installations in explosive atmospheric areas and populated locations such as malls, multiplex etc. These dry type transformers have F or H insulation class with or without enclosure as per the site requirement.
SERVOMAX has a wide range of ISOLATION TRANSFORMERS which reduce the effects of power Line problems like noise, spikes, surges, transients and neutral, to a minimum.