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Question
what is derating factor in Cable ? how we minimise this?
 Question Submitted By :: Kaustubh
I also faced this Question!!     Rank Answer Posted By  
 
  Re: what is derating factor in Cable ? how we minimise this?
Answer
# 1
Due to partial discharges in cable it can't be utilized to
it's rated capacity.
As current flowing to charge cable capacitance is extra
burden on that which will make it to carry less current for
load.
To reduce this good insulation material should be use.
 
Is This Answer Correct ?    57 Yes 60 No
Viral
 
  Re: what is derating factor in Cable ? how we minimise this?
Answer
# 2
Derating factor depends on ambient temperature & how u r
laying the cable ie., in Air,Duct,Burried.
normally the current carring capacity of a perticular cable
is calculated at 40*c, but if u lay the cable in air then
it includes the temparture around it,if it increases more
the 40*c then the conductor gets heated up by increasing
the resistance in it thus the current carring capacity of a
given cable decreases, so we will derate the cable
 
Is This Answer Correct ?    145 Yes 17 No
Kekshavanarayana.g
 
 
 
  Re: what is derating factor in Cable ? how we minimise this?
Answer
# 3
Apart from higher ambient temperature than 40 degree which
derate cable, the depth of cable for UG Cable, distance
between two parallel cables also derate cable.
 
Is This Answer Correct ?    56 Yes 11 No
Dkmathur
 
  Re: what is derating factor in Cable ? how we minimise this?
Answer
# 4
For obtaining a desired current at the utilisation end of a
cable irresponsible to the rated current carrying capacity
of a cable, many factors to be consider which tends to
reduces the current carrying capacity of a cable. viz
length of cable, connected equipment, inductive, capacitive
loads, etc. these factors will increases the actual current
and desired size of a cable.
 
Is This Answer Correct ?    18 Yes 23 No
Viswanathan.
 
  Re: what is derating factor in Cable ? how we minimise this?
Answer
# 5
derating factor depents on withstand level of ambient
tempreature,when it increase at tat time resistance of
cable is increase so current carrying capacity of cable is
decrease so it will derate the cable rating..
then based on the cable fixed in a cable tray and the
distance between the cable in tray...
 
Is This Answer Correct ?    27 Yes 12 No
Dev Bala
 
  Re: what is derating factor in Cable ? how we minimise this?
Answer
# 6
Due to partial discharges in cable it can't be utilized to
it's rated capacity.
As current flowing to charge cable capacitance is extra
burden on that which will make it to carry less current for
load.
To reduce this good insulation material should be use.
and this mean that if cable can its rated 100 Amp. it will
max amp 95 Amp.
 
Is This Answer Correct ?    7 Yes 24 No
Mohamed Abd Elhamid Elsaied
 
  Re: what is derating factor in Cable ? how we minimise this?
Answer
# 7
Loss of Dielectric strength of cable is the derating factor
of cable.... It can be minimized by selecting the proper
rating of cable with operating conditions and proper
maintenance of cables
 
Is This Answer Correct ?    17 Yes 16 No
Jagadisha.n Bmsit
 
  Re: what is derating factor in Cable ? how we minimise this?
Answer
# 8
Die electric factor depends on the temperature around the
cable, method of cable laying etc..if cable is to be design
for 35 deg c and if temperature increases above 35 deg c
then resistance of cable increases (positive temp.
coefficient), so its current carrying capacity will
decreses...So current paseed through cable will decreases,
it menas its capacity will down..it's called derating
current and notrated current...and same effect is done for
cable laying method...By using good insulation and proper
method of cable laying reduces its effect...
 
Is This Answer Correct ?    24 Yes 7 No
Shvetang Dave
 
  Re: what is derating factor in Cable ? how we minimise this?
Answer
# 9
type of derating factor:
1-soil thermal resistivity
2-grouping factor(cable distrubtion in trays horizontial
-verticals)
3-temp derating factor
4-burial depth derating factor
 
Is This Answer Correct ?    40 Yes 5 No
Helwan University
 
  Re: what is derating factor in Cable ? how we minimise this?
Answer
# 10
Due to partial discharges in cable it can't be utilized to
it's rated capacity.
As current flowing to charge cable capacitance is extra
burden on that which will make it to carry less current for
load.
To reduce this good insulation material should be use.
 
Is This Answer Correct ?    5 Yes 15 No
Yogesh Zambre
 

 
 
 
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how the frequency was generated in power station   2
why pull the single core cable?   1
which course is maximum demand in industry and give me the list of best courses for electrical engineers   1
what is the impedance voltage of transformer? MacLellan 1
 
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