what is derating factor in Cable ? how we minimise this?
- 18 Answers
- 113074 Views
- Bhel, College School Exams Tests, I also Faced
- E-Mail Answers
Answer Posted / kekshavanarayana.g
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 ? | 242 Yes | 25 No |
Post New Answer View All Answers
my bachelors was done with EEE now i got admit in NU with CS as course. how to answer this qns 1) why u choose cs? 2) why u changed from eee to cs
difference between high and low impedance BUS BAR relay??
A TRANSFORMER 440/400V,DELTA/STAR CONNECTED.THE NEUTRAL CONNECTED WITH GROUND CABLE THAT IS DIRECTLY CONNECTED TO THE PANEL,FROM PANEL IT IS CONNECTED EARTH PIT.IS IT RIGHT? IF IT IS RIGHT LEAKAGE CURRENT AFFECTED.SECONDATY IS PROTECTED WITH EARTH LEAKAGE RELAY.
differnce between single acting and double acting solenoid valves
What are the basic elements used for modeling mechanical rotational system?
In a tap changing transformer where is the tap connected, is it connected in the primary side or secondary side?
y we use neutral,all r told its used to for closed path..k its a just used to closed path,in a transmission line y we put same conductor used n both phase and neutral..if we use less than phase conductor in neutral mean we ll reduce cost its right r wrong..if we use mean any problem occur in transmission line..
our industries ht line so power fluctation(once drop of power please rectify causes
Batteries used for electrical energy storage are a. Laclanche cells b. Edison cells c. Lead acid cells d.any of the above
describe the A.C. Generator Testing procedure
Difference between HRG and NGR. Are they both the same thing
What is the difference between earth fault protection of motor feeder with CBCT and Without CBCT ?
Can u tell me design of switch yard
An impedance of 100 ohms resistance and an unknown inductance is connected across the capacitor. The resulting impedance is a pure resistance of 500 ohms ifω = 10^5 rad/sec. calculate the values of inductor and capacitor.
How to calculate no of Lighning arrestors are required for protecting 50mX 50m*20m cubical building and locations of LA?
