What Happens if the Prime Mover of Synchronous Generator Fails?

If we take a Thermal Power Plant, then steam Turbine serves the purpose of prime mover and coupled with Synchronous Generator. Now if the steam supply to the steam turbine is suddenly cut off while the Synchronous Generator is connected to Grid, what will happen?     The answer is simple. If all the Generator … Read more What Happens if the Prime Mover of Synchronous Generator Fails?

Why not Blocked Rotor Test by Keeping Induction Motor Rotor Winding Open?

As discussed in the previous post Blocked Rotor Test of Induction Motor, the rotor is prevented from rotating and then a small voltage is applied to the stator sufficient to pass the rated current through the stator winding and then leakage impedance of Induction Motor is calculated. The question may arise that why don’t we … Read more Why not Blocked Rotor Test by Keeping Induction Motor Rotor Winding Open?

Blocked Rotor Test of Induction Motor

As the name of the test specifies, in Blocked Rotor Test, rotor of Induction Motor is blocked by external means so that it cannot rotate. The Blocked Rotor Test of Induction Motor is similar to the short circuit test of a transformer. As in Transformer short circuit test, we apply a voltage which can circulate … Read more Blocked Rotor Test of Induction Motor

Why Star Delta Starter Preferred in Induction Motor?

The main purpose of any starter is to reduce the requirement of high starting current. Normally the starting current of an induction motor is 6 to 7 times of the full load current. If one has an induction motor with a DOL starter, drawing a high current from the line, which is higher than the … Read more Why Star Delta Starter Preferred in Induction Motor?

Transformer Differential Protection

What is Differential Protection? Differential Protection is based on the fact that any fault within electrical equipment will result into the difference in current entering it and the current leaving it. Thus by comparing the two currents either in magnitude or in phase or both we can determine a fault and issue a trip decision … Read more Transformer Differential Protection

Deciding Factor for Selection of HVDC over HVAC Transmission

This is a famous question which most of the people ask to an Electrical Engineer that “Suppose we are setting up a power plant so shall we use HVDC or HVAC Transmission?” In this post I am going to answer this question with examples which will help to clear the concept. We have already seen … Read more Deciding Factor for Selection of HVDC over HVAC Transmission