increase the insulation of the windings

make the windings vibrationless

provide an additional insulation layer on the windings

all the three stated above

for short-circuit test only

for open-circuit test only

For 'earth' fault test only

for all the three above stated tests

open-circuited

short-circuited

independent

nothing of these

active side

inactive side

coil lead

unuseful side

basket winding

concentric winding

skein winding

Gramme winding