Answer Posted / mior
In general, there are 2 types of Tx; Dry type (normally
called cast resin) and Oil Type Tx.
Selection to design the Tx whether to be dry or oil type is
subject to the cooling system of the tx itself. For the Dry
Tx, air will be the cooling media whereby in Oil Tx, the
oil itself will be a media to cool the tx’s core winding.
There are 2 types of cooling system that can be use named
Natural Cooling (ONAN) and Force Cooling (ONAF). These
types of cooling systems can be applied for both tx.
In principle, both (Oil & Dry) Tx works the same way. The
major difference is that, you can see the core winding for
the Dry Tx (since the winding enclosed in air ventilated
enclosure) but you can’t see it on Oil Tx (since the
winding enclosed in confine metal enclosure@tank).
Mior
www.Guide4ElectricalConsultant.com
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