How to find Cable size?
Caterpillar generator produce (Two generators) 127*2=254 amp
at 11 kv .
What would be the cable size (XLPE) to supply 256 amp at 11
kv? Air or surrounding Temperature is 32 degree C. Cable
will go under ground at 2.5 feet depth. Group Rating Factors
is 3 cables. Clearance between cables is 7 cm. Soil
Temperature (Ambient) 28o C Soil Thermal Resistivity is 1.2
K.m/W
I would like to use 3 separate single core instead of using
3 core cable.
Some says I should use three separate single core 120RM cables.
Some says 70RM .some says 95.
I m totally confused.
Is there ant specific rule to determine cable size?
What would be the LT cable size to flow 500 Amp current?
Ifte
My e mail address is ifte13@yahoo.com
Anyone please send me the answer to my e mail address,
i will be very glad.
- 1 Answers
- 7811 Views
- I also Faced
- E-Mail Answers
Answer Posted / muhammad qasim
Dear, All those specification you described in your question
are cared while manufacturer design their product. Designing
contains many complex parameters to be cared while deciding
about the metallurgy, insulation. All good manufacturer care
worst operating conditions when they design their products.
When we go for their usage in industrial sector, main things
we need to assure are that:
1- Current Raging
2- Voltage Drop should not exceed the permissible level
3- Cable should have withstanding capability for transient
short circuit and thermal capability.
Normally, copper have current density of 1000 A/Sq inch
which becomes 1.8 A/Sq mm. and all cable and bus bars should
be designed 150% of operating rating for safety purpose.
Secondly, Conductor area is not affected with voltage level,
50 A at HT or LT shall require same conductor area but
insulation level shall be affected. For HT you need XLP and
for LT you need PVC-PVC cables.
Further if you get better answer please copy the same to
muazmi02@yahoo.com
Regards
| Is This Answer Correct ? | 4 Yes | 0 No |
Post New Answer View All Answers
State the methods of improving power factor?
how can calculation ate Amps for cabel. Ex-for 1sqmm wire hou many amps we can draw
sir i have cleared the apti test of EIL held on 15th march and my interview will be in new delhi on 2nd june.i will be very much helpful if u help me regarding the type of interview questions comes at EIL.(URGENT.........PLZZZZZZZZZZ...............)
Explain the laying procedure and laying depth of submarine/subsea power cable for 220/400KV system? Also available cable diameter?
is it true there's a big difference in using Cummins or Denyo...especially power output or leakage
Give details of your interested designation, the post you are interested to serve the company better and explain why you think you can serve the company better in such position if employed?
How will be the single line diagram of series trip HT breaker? how it works?
what are the interview question asked in wind mill about electrical
The power factor of the fixed load is 0.8, now the p.f is varying from 0.8 to 0.5.
Can anybody just suggest about the scope of Electrical design with ETAP software?Just guide me?
If we are given a 10 amp cable type and asked to calculate the number of cores used and the thickness of the cable, how do we do it?? please help...urgent!! i hope the question is clear enough!!
What are the basic elements used for modeling mechanical rotational system?
1.25 kg of hydrogen are burnt with stiochiometric air, the mass of air in kg required is
Why AC & DC capacitor are use in UPS ??????????????????
What are the different sign conventions used in electric circuits?
