what is derating factor in Cable ? how we minimise this?
Answer Posted / nid
derating factors are differ with the bunching of cables for
single layer it is .9
double layer .71
tripple layer .62
4 layer .56
| Is This Answer Correct ? | 0 Yes | 3 No |
Post New Answer View All Answers
If 22 KV HT line, Current transformer is 25/5 then how to calculate multiplying factor.
I am getting above 60 V as open delta voltage against single phase unit ICT at tertiary delta formed and ICT getting trippped on NDR. ICT tested and found in order. PTs provided on tertiary are tested and in order. what may be the reason?
how test transfomer(3 phase75kva) by megger
(1)Can earth and be conected together (2) what is the diferent between earth & neutral
Stator of 3-phase IM has 3 slots per pole per phase. If supply frequency is 50 Hz, calculate the speed of rotating stator flux A 1000 rpm B 500 rpm C 1500 rpm D 1440 rpm
how to calculate the size of the HT cable
Testing report of Earthing of 3.15 MVa PTR.
STATE WORKING OF VACCUM CIRCUIT BRAKER?
1 “earthing” for bonding of equipment and circuits to common plant earth electrode potential, 2 “protective earthing (PE)” when this bonding is required for personal safety provisions 3 “grounding” for interference suppressing bonding of screens, sys-tems with ground level 4. low-impedance earthing ? 5.primary earthing system and secondary earthing system what is that? 6.earthing electrode or mesh net earthing electrode ? very confusing , simple but very informative help required ? i will be very very thankful to you guys.
Whether IP65 enclosure box blocks ventilation if driver for LED have to enclosed inside IP65 box
In electrical locomotive engines, the DC series motors is being used as traction motor. But in new engines like in WAP7 & WAG9 the 3-phase squiral cage induction motors has replaced them. So can someone tell me the advantages of induction motor over dc seris motor in engines points of view....???
What is the difference between solid grounding and impedance grounding?
A powerplant has 8 gensets operating in grid parallel mode. In one genset sometimes there is pf variation and kvar variation. The plant operates in pf mode. When this variation is observed the load is stable, voltage is also stable, freq and genset speed is also stable. How will you check the functioning of pf card. What shall be the ideal output vdc of the pfc, from there it is input to AVR?
Why in ESP Positive earthed
there is an alternator 480 k.w, 400v,50hz, 4-wire running on load having leakage alternator body earthed current 38 A. is it within acceptable limit? if yes then give reference if no then how to bring within specified limit