2-2-4 Transformer Construction Flashcards
Round wire is the only type used in transformer coils.
False
More heat flows out of a transformer windings if __?__ or __?__ wire is used in the coils.
square / rectangular
The best insulation for transformer coils is cotton.
False
The baked-on insulating compound used in transformer coils prevents __?__ from getting into the windings.
moisture, dust and dirt
The point where high voltage leads are brought out of a coil are considered critical points for insulation.
True
The high voltage winding is normally placed next to the core to increase EMF.
False
The thin, insulated sheets of steel in a transformer core reduce __?__ and __?__.
core loss / heating
The main purpose of a transformer core is to direct the magnetic flux.
True
Two types of electrical transformer cores are __?__.
shell and core
Core-type transformers are best suited for low voltage and high currents.
False
Transformer bushings are manufactured using a __?__ process.
wet
Normal types of losses concerning electrical transformers are __?__.
copper and core
A transformer that is energized but not loaded can draw as much as __?__ of the current taken in by a loaded transformer of the same size.
5%
If you use too small a fuse to test a transformer, it may blow due to exciting current.
True
Heat in a transformer core is generated because of the __?__ of molecules.
constant reversal
