A 15 kw squirrel cage motor having a maximum efficiency of 90% on a continuous f

A 15 kw squirrel cage motor having a maximum efficiency of 90% on a continuous full load has temperature rise of 42 degrees celcius after 30 min and 52 degrees celcius after 1 hr under the above operation conditions.
a) calculate its final steady state temperature rise on continuous load and the heating time constatnt.
b) if the motor is operated on a short load for 9 min estimate its temperature rise.
c) calculate the maximum overload that can be applied on a short, 9 min rating so that the temperature rise is the same as the final steady state temperature rise on continuous load.

Question Posted / admire

0 Answers
860 Views
I also Faced
E-Mail Answers

No Answer is Posted For this Question
Be the First to Post Answer

Post New Answer

More Electrical Engineering Interview Questions

why there is no current in the rotor body althrough the flux linking with it also get changes. why current only flows in windinds not in rotor

1 Answers Vedanta,

when a motor is connected in parallel with the existing motor the pf will change or not?

9 Answers

What is voltage

4 Answers

KVAR Kilovolt-Ampere-Reactance

2 Answers

Can you please explain creepage distance in detail, for a 6.6kV cable head what must the distance be and how do you determine it?

0 Answers Prism Cement,

what are protective device needed to power a 360W ,50hz,240v,single phase,0.65 pf universal motor

1 Answers L&T,

what are the types of starter ?

25 Answers Andhra Sugars, Bhel, Eveready, HyFun Foods, Jindal, ME, Valeo Lighting Systems India Private Limited,

which is chemical used as in ro water what is difference betweeen multi grade filter&dual media filter

0 Answers Dalkia,

Wat is meant by OLTC?

1 Answers

what is PI value and its significance for insulation testing?

3 Answers

WHAT IS M.P.C.B

3 Answers

if the load is reactive then what is the use of calculating the real power and what is the use of reactive power if my question is wrong please excuse me..

1 Answers

For more Electrical Engineering Interview Questions Click Here