Why induction
motor can not be
operated at
synchronous
speed?? what
would happen if
it is operated
at synchronous
speed??
Answer Posted / dwivedi sandeepdhar
if ind. motor operate at synch. speed than there will be no
rate of change of flux and hence no induced emf hence no
torque.
| Is This Answer Correct ? | 26 Yes | 3 No |
Post New Answer View All Answers
ult of expression 'document.FrmQF.myem
What is the need of generator relay panel
different aspects of voltage stability
Do you need any help with FEWA Electrical Supervisor exams?
please send me RRB electrical engineer previous year questions for Sr. Section Engineer
explain transformer ct connection?
which motor have relatively high power factor and what is reason for have high pf? 1.capacitor run motor 2.shaded pole motor 3.capacitor start motor 4.split phase motor
(1)WHAT HAPPENS WHEN SUDDENLY LOAD GIVEN TO THE INDUCTION MOTOR ? (2)CAN WE MAKE WOOD AS MAGNET ? (3)WHAT IS THE VALUE OF MAGNETIC FLUX DENSITY IN TRANSFORMER ? (4)WHY WE ARE USING ELECTROMAGNETI NOT ELECTROSTATIC IN MACHINE ?
Hello sir i m student of gtu .what is idp.
I am inpecting a 10kVA UPS what tests should i do and should i observe?
Why DG set is not installed in Terrace ??
why you don not show protection and type of isolation in key single line diagram?
How will you utilise electrical power? You can start from the generating station.
Dear all, I just want to ask an expert on this forum for some insights. For the magnetic balance test, when applied voltage on a Delta-Star transformer e.g. Dyn11, the following relationships apply for HV side: 1. H1-H2 = H2-H3 H3-H1 2. H2-H3 = H3-H1 H1-H2 3. H3-H1 = H1-H2 H2-H3 For the LV side also: 4. X1-X0 = X2-X0 X3-X0 5. X2-X0 = X3-X0 X1-X0 6. X3-X0 = X1-X0 X2-X0 Is there a similar pattern for Y-d, Y-Y, D-d? And how about Y-z, D-z, Z-y transformers? I've tested a YNzn5 transformer and for LV side I don't see the pattern. In this particular case I got for LV side the following (see values below): H1-H0 H2-H0 H3-H0 X0-X1 X0-X2 X0-X3 128.0 119.9 7.2 29.2 13.3 15.8 70.7 128.4 59.2 23.4 22.0 3.6 7.2 120.1 128.1 13.4 29.3 15.8 What is the relationship here for LV? For row 1 I see the relationship, for row 3 I also see but it's shifted, but for row 2 I don't see such relationship. Any suggestions, answers, someone?
-What should be minimum value of insulation resistance and maximum value of earth resistance at any electrical instillation and what is method of testing the same.