what is derating factor in Cable ? how we minimise this?
- 18 Answers
- 113095 Views
- Bhel, College School Exams Tests, I also Faced
- E-Mail Answers
Answer Posted / shvetang dave
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 ? | 34 Yes | 12 No |
Post New Answer View All Answers
How the annunciator works ? How to do its wiring
What do you mean by power transformer?
what is static frequency converter?what is the function...of sfc...?
why moisture formation found in XLPE Armoured cable outer sheath
how we provide neutral earth on synchronising panel as per electrical standards?
lorteny method
how does commutator convert a.c to d.c?
How can we increase the capacity of Energy.?
Post possible questions for Power Factor Panel FAT / SAT
What is difference between isolator and circuit breaker?
1- XC and the RC time constant are both measures of the reaction of C to a change in ____? 2-The power factor is a numerical ratio with a value between 0 and 1 equal to the ______________ of the phase angle. 3-When V and I are out of phase because of reactance, the product of V times I is called ______________ power 4-For _____________ inductors, the branch currents can be added algebraically. 5- The ______________ power in watts can be calculated as I^2R 6-Calculate XL with L = 30mH and f = 1kHz ( I have Xl=2piFL 2*3.141592653*1kHz*30mH =188 ohms Please check) 7-A parallel RL circuit has the values, R = 5kohms, XL = 5kohms. A voltage source of Vt = 10Vrms is connected in parallel to R and L. Determine the total current, It delivered by the voltage source Vt. 8-A series RC circuit has R = 1Mohm and C = 1microF. How long would it take for the capacitor to fully discharge if it is initially fully charged? 9-A circuit has real power = 300W and an apparent power of 500VA. Determine the power factor and phase angle. 10-The time constant for an LR series circuit is T = 0.1s and R = 10ohms. Calculate the inductance L.
please forward me the type of questions which would rise while me attending to 33KV Electrical License to my mail ID:vadrevu_raghava@yahoo.co.in
why asa method ZPF method is more accurate than ASA method?
can a 150 kva 3 phase 440v/230V delta-wye step down transformer can be use as step up transfoermer with connected loads at 440v side?
What is meant by time harmonics and space harmonics?
