Question

What will happen if Transformer is operated at 100 HZ Frequency?

Answer 1

1. As per EMF equation of the transformer frequency is directly proportional to winding voltage. If we double the frequency the sinusoidal root mean winf=ding voltage also doubled.
E=4.44 * f*b*n*a*b

Voltage in winding increase double, due to this effect flux density increases to double it cause high no load losses and may cause to destroy the core

emf e=4.44BAfn volts

If the frequency is increased induced emf also increased so the induced emf damages the insulation of the winding it will leads to short ckt 2. Thye transformer iron losses will increase 4times as iron losses is a function of the square of the frequency.As a result of increased Iron losses temperature will shoot up. 3. Following series of action will occur when 100Hz power is applied to 50Hz transformer. 1) Core gets saturated 2) No-load losses increases and Temp. Too goes up 3) Output voltage cannot be predicted as the core is totally saturated. 4) Heating continuous and gradually damages the core 5) This is followed by heating up of the oil and thus cooling temperature goes down sharply.