Answer Posted / ashok
for traction application we preferred dc series motor.
becas its starting starting torque is high
| Is This Answer Correct ? | 6 Yes | 0 No |
Post New Answer View All Answers
What is the difference between rated and per unit in transformer?
grr resistance & contrator malt continuous
What are the insulation standerds for eg H clase and how many insulation standerds are there and its standerds??????
I have a drawing of a wound rotor induction motor for a crane. This crane motor has 5 forward speeds & 5 reverse speed implemented of course with different amount of resistance for each speed setting selected. What has got me scratching around is the fact that 8 of the 10 speed selections switch in uneven (unbalanced) amounts of resistances on each of the 3 connections to the motor's rotor.Can this be possible? I would have assumed this would produce unbalanced rotor currents and therefore vibration in the motor. I would greatly appreciate anyone's comments on this. Many thanks, Confused.
Differentiate between low pass, high pass and band pass filter?
Dyn1 transformer vector group testing how to do
Which Class insulation is prefered for the sandwich Busducts ? Why?
Define steady state error.
list of tests to be carried out at manufacturers end while purchasing a step up transformer of 11kv to 66kv ,2MVa Capacity.
why 15 kw motor winding resistance is low then 5 kw motor winding resistance?
If symmetrical fault occurs at the terminal of a synchronous motor then how the motor will act...explain it..
what is parellel power factor correction?
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?
plz send me the syllabus or any sample paper for engineer trainee recruitment if any,on ravinder911@yahoo.com
Why PS class CT is always preferred for Differential protection?
