HOW TO CALCULATE THE HEAT AND LOAD OF LT-SUBSTATION WHICH CONTAINS 2*1MVA TRANSFORMERS,LT SWITCH BOARD,MLDB,ACB,BUSBAR,ETC...?2589
HOW TO CALCULATE THE HEAT AND LOAD OF LT-SUBSTATION WHICH CONTAINS 2*1MVA TRANSFORMERS,LT-SWITCH BOARD,MLDB,ACB,BUSBAR,ETC,......?754
What is erection of electrical system?1 3661
what is rotatng magnetic field in case of three or multiple phase alternating current machines???
Brushed alternator is also called dc generator ? its true or false ?explain it ?5 3253
what is the working principle of Brushed alternator ? without exictation how we can give dc supply to rotor ?1 2295
Totally how much power will be consumed in 1 hour cotinuous running of electric train engine?
i am working in a grid substation,TNEB having 13 yrs experience. Am I eligble to get apply for c licence now?3 4836
I am a possesor of c licence from 1993. I forgot to renew during the year 1998. During that time I was working at TNEB to till date. Is there any possibility to get renewed? or to apply for a new one?738
what is difference between c-power & u-power air circuit breaker?2 14760
what is meant by Back emf ?where its occur ?5 8097
how to remover corona effect and hysteresis losses from contactor
in dc suppy frequency is zero why? if dc frequency is zero how to exist dc transients and ac transients
The 3 phase Delta connection RB=440V, BY=350V,.......* is Line to Line voltage RY= ? And Formula....?
Why 9KV surge arrester having 7.65KV of MCOV?
How to decide CT & PT ratings for a given transmission line carrying some rated voltage?
how to calculate the change over time for star delta starter for different KW motor?
What information we need to prepare relay coordination chart
How to measure size of cable on a given load
How to select, design,size & calculate for 11 KV/33KV/66KV/132KV/220 KV/440 KV circuit breaker for HT side of transformer protection/HT distribution protection?
In our plant we have installed new MCC with ELR and CBCT which is detecting some leakage current in the system but it leading to some confusion when to check that in which feeder which is drawing current we put off the whole panel itself but still CBCT detecting some leakage current so can anybody ans me , where i am going wrong or how to detect whether its actual leakage or CBCT malfunctioning.
WHAT IS MEANING OF Gg & Gg IN hrc FUSE
In Dyn11 power transformer if any one of the 3 phases connected to earth in star connected side then please explain effect of the current flow in delta connected side of transformer.(In this case if one phase is shorted to ground in star connected side then we observe the current flow in two phases only not three phases in delta connected primary side. Please explain why it is so?)
if we have a industrial load of 400 kilowatts with 415 volt AC then how much total harmonic distortion (thd%) should be acceptable for steady power system.
i am an maintenance engineer. one distribution board have 5 feeder. recently its ELR trips frequently, but it take some times after trip( 10min,20min..)but 3 feeder no load. two feeder only loaded. i checked one feeder IR value all values are above 50Mohm.but B phase to Earth is only 9Mohm.any problem about low value
What is the lower limit of break-down voltage of converter transformer.