what is VFD and how to save the power by using VFD?

Answer Posted / virendra

Frequency decrese then flux increase & hence current decrese

Is This Answer Correct ?    0 Yes 2 No



Post New Answer       View All Answers


Please Help Members By Posting Answers For Below Questions

I am abt to give IOCL intrv.Plz sir guide me for IOCL intrvw (Electrical).Which subject to be consider. questions are generally asked from which subject.Plz help me out.

1520


Is it posible to instal one more SMDB from the existing SMDB and is it practical.

1601


a simple c++ program to calculate simple interst with its data members as private

1389


How to calculate the no of Ceiling fan (1200mm sweep) per unit area?

1387


in single phase converter, the no.of scr's conducting during overlap a)1 b)2 c)3 d)4

1630






What is dielectric loss?

647


A 500 V shunt motor runs at its normal speed of 250rpm when the armature current is 200A. The resistance of the armature is 0.12 Ω. Calculate the speed when a resistance is inserted in the field reducing the shunt field to 80% of normal value and the armature current is 100A.

2024


What is expention fastener (Fan)

1556


what is ramping rate of generator

1565


if 12v battery get discharged for 2 months after if we put charge it will charge again?how much time it will take to charge?

1525


WHAT IS THE MEANING OG (li = 7 In)

1533


What is meant by derating factor?

670


how hazordious area is classified at an oil & gas plant and categorise suitable class of electric equipment in that area like induction motors, LCS, Lighting Fixtures Fluerescent/Flood lights Mercury& sodium lights, J.Bs, Power Cables etc

1354


why the field winding in dc motor is not short circuited eventhough dc supply is applied across the winding

1410


whit is 33kv power 300*300 cable full current with formula

1391