for 12KW motor which cable size has to select for ex.10
meter.
Answers were Sorted based on User's Feedback
Answer / prodip das
1. we have to select cable
for that first calculate current=12X1000/1.73x400x.95
=19 Amps
Type of cables= single core NYY(Red/Yellow/Blue/Green)
Cable size3x1CNYY
NYY 2.5 sq.mm
(ccc)=19.61A
Group rating=.68
sand bed=.90
Rating factor=.68x.90=.61
Actual CCC OF 2.5SQ.MM CABLE
=19.6X.61=11.96A
=26.20x.61=15.98
=33.63x.61=20.5143(OK)6 sq.mm
Votlage drop as per IEE regulation
Distance=10m(more)
=5.9x10x.152=8.968V(ok)
Finally SWG=6sq.mm
Is This Answer Correct ? | 7 Yes | 3 No |
Answer / abdulsubur
FROM THE FORMULA P=ROOT3 VICOS PHI
12/ROOT3*400*.85 WE GET I=20
VD= MV*L*I/1000
WE GET 10 SQR MM+EARTH CABLE 6 SQR MM
Is This Answer Correct ? | 5 Yes | 2 No |
Answer / phanendra babu
the selected cable should have the capability of
withstanding the over load /short ckt currents upto before
operating the protecting device. so assume 0.81 p.f,the load
current is given by apprx 20A .very safe working of copper
cable is 4A to 6A per 1sqmm ,so the size of the cable
suitable for 12kw motor is 6sqmm. copper cable or 16 sqmm
aluminum cable.
the above calculation is for lo current ratings if current
rating increases capacity will decrease.
Is This Answer Correct ? | 4 Yes | 1 No |
The cable size will depend on the you rated voltage and
cable route you can reffered to
IEC 60364-5-52 Electrical installations of buildings -
Selection and erection of electrical equipment - Wiring
systems
or from electrical installation guid from schneider site.
Is This Answer Correct ? | 5 Yes | 4 No |
1.Z transform always lies around ? a) origin b) pole c) zero d) z=1. Multiples Mcqs which is bother me can’t find answers on internet. Some help required with little explanation . Note: this is not homework or related to any test. Thanks
What are the specifications for conducting earth leakage test as per IEC standard?
what is the tolerance of electrical frequency for India? it's .5% or 1%?
define bilateral network and unilateral network? give an example.
what is the internal working of star delta starter
What type of bulb used in small size cross symbol boder and original flame type(Deepam)?
What is servo motor? what is its purpose?
can we use existing delta star with neutral grounded,step down(6.6kV/415V), 3 phase power transformer bi-directionally.
what should be the no load current for 3 phase ac motors ranging from 5 kw to 1000kw?
Batteries used for electrical energy storage are a. Laclanche cells b. Edison cells c. Lead acid cells d.any of the above
what is transformor oil gread
sir i want previous entrance exam papers for written test