Thanks for making this video. It's the best I have found on this topic. Can you please provide info on how the reference materials used on this video? The derating factors and cable size tables will be especially helpful.
@akbarshokrifirouzjaee1837 Жыл бұрын
آفرین جوان
@karthickd.n8403 Жыл бұрын
de rating factor reduces the current carrying ability of the cable , so 187A x 0.76 = 142A , as the FLA of transformer = 131A, selection of the cable size of 50sq.mm is good. correct me if iam wrong.
@adamdhible5704 Жыл бұрын
That is what I thought myself. De-rating means reducing the rating of something and they should be multiplied.
@cedarxeda26653 ай бұрын
You re wrong
@amiselectricals5553 Жыл бұрын
Thanks for sharing these valuable details. Kindly send the link to get this chart.
@martync87242 жыл бұрын
Very thorough and clear - thx.
@foras872 жыл бұрын
Do you know about any software for a medium voltage cabling calculations?
@electricalknowledge26542 жыл бұрын
Softwares are usually rough estimates and calculations vary according to the Cable manufaturers specifications or tables. So you must understand the cable size Calculation for right selection of cables.
@juanlotta29252 жыл бұрын
It would be helpeful if you share the standards you're taking into account
@faisalbukhari4119 Жыл бұрын
Very Good. Keep it up. Make more videos.
@charinath5445 Жыл бұрын
what is the difference between HV and LV cable sizing?
@tariknawazkhan37642 жыл бұрын
Thanks Man... really appreciate
@hidayahsahudi4567 Жыл бұрын
How to calculate if we want to use 2 or 3 nos of cables per phase?
@sniperchanel39173 жыл бұрын
Thanks for share verry interesting content
@sumedhaweb1809 Жыл бұрын
how can u add Rcos@ and X sine@ .these are complex numbers. it should be
@MuhammadAwais-ob2ib2 жыл бұрын
Appreciate your effort.
@azhar204 Жыл бұрын
hi sir, i gave one doubt if the length is 15000 MTR as my able length is 15KM shall i need to divide it my 1000 or 10000..
@electricalknowledge26549 ай бұрын
Brother you need to divide by 1000 if you are taking length in Meter. If your length is already in KM, then no need to divide by 1000. Means if you are taking 15km then no need to divide by 1000
@pradeeppoojari27868 ай бұрын
Current after derating factor why it is devided by 0.76..it should be 131*0.76 apprximately 100 Amp
@electricalknowledge26548 ай бұрын
When you divide with derating factor, you will get the value of current, including derating factor margin. When you multiple with derating factor, you will get a value of current after deration which means you need to add additional derating margin to find out the value of current to be selected from cable table.
@dank96257 ай бұрын
Hello! May I ask the references for the derating factors Tnx
@tuleanhvt3 жыл бұрын
Hi H N, As I have known for the motors, we should be aware of voltage drop in both steady state & starting of motor. Could you explain for these cases of Motors?
@electricalknowledge26542 жыл бұрын
Please watch my separate video on cable size Calculation for motors and group of motors
@thrinadnadh91252 жыл бұрын
Hello Sir, what are you showing the tables to calculate HV/MV Cables from which IEC Code?
@electricalknowledge26542 жыл бұрын
IEC 60502-2
@thrinadnadh91252 жыл бұрын
@@electricalknowledge2654 Thank you very much sir
@zubairali7442 жыл бұрын
from where you get the cos@ & Sin@ value? respectively 0.8 &0.6 please clear.
@electricalknowledge26542 жыл бұрын
Power factor assume to be 0.8 in the selected case study, however the value may changes according to your requirements or conditions. The value of @ will be be calculated from cos@ which further derive the value of sin@.
@foras872 жыл бұрын
@@electricalknowledge2654 could you please clarify the 'The value of @ will be be calculated from cos@ which further derive the value of sin@'?
@foras872 жыл бұрын
Could you please advise how we can find the Max. Load Allowed on 1 Feeder @ HT = 5MW or 6.25MVA or 328A?
@electricalknowledge26542 жыл бұрын
Hi Artemois, It all depends on how much your concerned utility or electrical distribution company allowed on one feeder. I have shared the allowable load limit that is 5MW on one feeder referring to what allowed in Pakistan. It varies country to country.
@foras872 жыл бұрын
@@electricalknowledge2654 Thank you very much!
@amarnathmishra14612 жыл бұрын
It depends upon the current carrying capacity of the conductor used.with ACSR dog conductor, you may transmit 5 MVA load at 11kv
@joginderpal44612 жыл бұрын
120Kw motor need to cable size , with copper and aluminum, please brief example with formula
@etechgyan2217 Жыл бұрын
Can be use 95 sqmm
@mohamedali-tx4sb2 жыл бұрын
How many transformers can feed from m v switchgear in one loop
@electricalknowledge26542 жыл бұрын
Ali, It depends upon what rating of transformer you are connecting to one feeder. However, 5MVA can be allocated on one feeder usually by WAPDA.
@saeedahmed46512 жыл бұрын
can you please share the excel sheet for the easy calculation for pakistan.
@hanhan29212 жыл бұрын
Hi , Can you please send us the table for single core cables please ?
@muhammadKhan-br2qt2 жыл бұрын
I also need the table
@ScholarshipTamil2 жыл бұрын
Could possible to share supporting documents
@foras872 жыл бұрын
many thanks
@engr.saddamahamed40092 жыл бұрын
I think 2nd slid calculation is wrong. it will be only 2500KVA or you need to divided 1000 also. thank you
@electricalknowledge26542 жыл бұрын
Saddam, Answer is correct i.e 131A. However, you are right, the voltage is 11000V instead of 11kV thus to ensure the units are same.
@gamalhassan2769 Жыл бұрын
thx
@aymankazem69822 жыл бұрын
current for low voltage side is incorrect because short circuit current must be calculate for medium voltage network 500 MVAS.C
@electricalknowledge26542 жыл бұрын
Ayman, These calculations are for medium voltage cables and short circuit fault current calculated at specified duration of time. I think you are mentioning about fault current of system which are require to be calculated on base MVA of system.
@aizazrahim83132 жыл бұрын
Sir, plz share this cable catalog
@electricalknowledge26542 жыл бұрын
You can download catalogue from Pakistan Cables Limited website
@arun48462 жыл бұрын
👍😉
@transientmatter60882 жыл бұрын
when you size mv cable , only short circuit power is enough ,
@electricalknowledge26542 жыл бұрын
You must comply three criteria i.e. Current Carrying Capacity, Voltage Drop and Short Circuit Current.
@transientmatter60882 жыл бұрын
@@electricalknowledge2654 Experience of 30 years says Short circuit power enough for mv cable..
@electricalknowledge26542 жыл бұрын
@@transientmatter6088 It depends, you may be right. What would be your reference for short circuit current before selecting a MV cable. I would recommend to comply all the three criteria.
@osamasadekadam3214 ай бұрын
Ok
@nadim60610 ай бұрын
seen
@ZarghamAli-i7c Жыл бұрын
Hi. Can you please share your email id for a project?