What is meant by pitch of a synchronous machine.??
what is the advantages of having in-built acvvvf (without seperate inverter in the control panel)in the drive system of elevators?
In power transmission using open belts or horizontal shafts it is preferable to have the slack side of the belt on the top because
what will happen if delta - star , 400V to 6.6KV step up transformer neutral is not grounded, Neutral is not used but transformer is provided with neutral.
what is meant by carrier aided trip protection in transmission line
1. The DC generaror,s induced output emf is connected with a DC motor(as load). when increasing the load of the motor by using brake drum or any way. what are the parameters will changes in both motor and generator(voltage, current, resistance, frequency, speed, torque, power, flux etc...) 2. Similarly for AC generator and AC motor 3. similarly if using DC batteries instead of DC generator, What happens?
What are options used for earthing the switchgear.
open circuit test when performed on double the voltage & double the freq, then what will happen with p.f and current magnitude?
BSNL TTA EXAM QUESTION
What is IGBT?Where it is used? What is the difference between IGBT and Thyristor?
5 Answers AC, Formo Plastic, HBL Power Systems, SECL,
how to prepare PPM schudule
what is the difference between normal motor and flame proof motor??
How one can check the faulty capacitor, diode when connected in the circuit ? and when you can not take them out ?
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