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@narayana-z4W16q • Dec 30, 2011
@aarthivg-HH344f • Dec 30, 2011
narayana murthyfully loaded means it has high current taking so check for the output power and input power as it is a.c and it is transformer it will have frequency of 50hz.
power=vicos(phi)
efficiency=output power/input power
so u can find efficiency at what ever rating is
@aarthivg-HH344f • Dec 30, 2011
@narayana-z4W16q • Dec 30, 2011
@aarthivg-HH344f • Dec 31, 2011
Is it a feasible system if we overload a transformer up to 150 percent for certain period of time and then allowing it to share the load with a another transformer by parallel operationnarayana murthyofcourse depending on rating and losses will be heavy in such case magnetic saturation also occurs here
@narayana-z4W16q • Dec 31, 2011
@lal-R60Xjx • Dec 31, 2011
@narayana-z4W16q • Dec 31, 2011
@lal-R60Xjx • Dec 31, 2011
@narayana-z4W16q • Jan 1, 2012
@aarthivg-HH344f • Jan 1, 2012
do you mean to say, overload does not cause insulation failure?lalI think, the surge that you mentioned is lightning surge and faults friend. I wrongly used the word 'surge' there 😁 My intention was to mean 'an increase'.
By the way, overload wont induce a breakdown. If the voltage increases beyond the maximum withstand-able value of insulation, it happens. Over load will cause large increase in temperature that would lead to damage of machine if proper cooling methods are not used. And there would be magnetic saturation problems. But machines are designed to work at more than hundred percent of the ratings.
@lal-R60Xjx • Jan 4, 2012
@aarthivg-HH344f • Jan 4, 2012
is it feasible to overload a transformerlalSorry to be late back here..
I meant, overloading won't induce an insulation breakdown. But it can cause insulator damage by increase in temperature.
@nm, yeah with suitable cooling techniques, a transformer can be overloaded.
@lal-R60Xjx • Jan 5, 2012
@aarthivg-HH344f • Jan 5, 2012
ok. thankslalI am not quite sure about that buddy. Will try to find out more 😀
@narayana-z4W16q • Jan 8, 2012
@aarthivg-HH344f • Jan 9, 2012
just consider this scenario. there are 2 transformer connected in parallel let it be t1 and t2. during flat period, t1 operates, and t2 is in off position. when the demand increases, transformer t1 is overloaded up to 150 % for some time. and then t2 is switched on.so that load is shared between them as 75 %. this eliminates no load losses and bus fault current. is it a feasible idea?narayana murthyactually overloading causes high temperatures due to increase in losses but according to me it shouldn't be overloaded but in some conditions situations demands at such time we can use answer given by lal
@narayana-z4W16q • Jan 10, 2012
yes ofcourseaarthivgjust consider this scenario. there are 2 transformer connected in parallel let it be t1 and t2. during flat period, t1 operates, and t2 is in off position. when the demand increases, transformer t1 is overloaded up to 150 % for some time. and then t2 is switched on.so that load is shared between them as 75 %. this eliminates no load losses and bus fault current. is it a feasible idea?
@aarthivg-HH344f • Jan 11, 2012
i have planned to do project on this basis.narayana murthyyes ofcourse
@narayana-z4W16q • Jan 13, 2012
nice then please give your progressaarthivgi have planned to do project on this basis.
@aarthivg-HH344f • May 5, 2012
At last this idea end up successfully. Thanks to allaarthivgjust consider this scenario. there are 2 transformer connected in parallel let it be t1 and t2. during flat period, t1 operates, and t2 is in off position. when the demand increases, transformer t1 is overloaded up to 150 % for some time. and then t2 is switched on.so that load is shared between them as 75 %. this eliminates no load losses and bus fault current. is it a feasible idea?
