what is the function and use of oil filled cables specify
its advantages and disadvantages
- 7 Answers
- 26149 Views
- Alstom, I also Faced
- E-Mail Answers
Answer Posted / jim
Oil filled cables are used, as back in the 1960's they were
the most cost effective method of implementing HV cables. It
wasnt until recent developments in XLPE cable that it became
a viable option instead of FFC. Fluid Filled cables are
mainly used as underground EHV ,extra high voltage,
typically 132kV in the uk.
the down side to these cables is that if they leak they can
cost a huge amount to repair. for a 30metre replacement of
FFC and 2 joints costs approx £100,000 GbP. also this type
of replacement could take up to 10 weeks to complete, with
excavations and leak detection.
to replace 15km of FFC with XLPE has been costed at
30million GBP.
FFC's are also often used in sub marine cables.
| Is This Answer Correct ? | 5 Yes | 2 No |
Post New Answer View All Answers
what is active power & reactive power?
What is the importance of counter based plan & how is it scheduled?
What is meant by stator?
Some times to change of DOR of a motor, interchange of R & B is not effected and RYB take same current, but interchange of R&Y is effected ie change the DOR. My doubt is what is the problem in motor and how it is happen.
Why are the cores of large transformers built up of circular transactions ?
A double circuit with dog conductor 66KV Transmission line from wind farm evacuation to feeding substation having capacity of 25MW for transmission. Can same transmission network be considered for further expansion of Power & how much in MW. If we need to expand next 10-15 MW more will there any augmentation is required in transmission network? Kindly reply asap.
how to find out cable size if load is 2800 watts, 230 volts AC supply and load distance is 1800 meters
1. A 380 / 220 V r.m.s. 3-phase 4-wire circuit carries loads of 8 + j8.1 ohm; 4 + j4.1 ohm; and 2 +j2.1 ohmin the three phases respectively. The length of the circuit is 100 m, and the resistivity of the phase conductors is 0.0005 Ω/m. The neutral conductor is of the same size as the phase conductors. a) Select a reference angle 0for the first phase. Then write down the three phase voltages in both polar format and complex number format. b) Make appropriate assumptions, and take temperature effects on resistance is insignificant. Calculate the currents in the three phases. (Note: Determine conductor resistance, and apply Kirchhoff’s Voltage Law) Based on the result, suggest a main switch rating for the circuit. c) Show your preferred direction of neutral current in a diagram, and then determine its value. (Note: Apply superposition principle, and Kirchhoff’s Current Law) Use its magnitude to show that in this circuit, the unbalanced load may increase the voltage drop in some of the phases. (Note: Also observe the common volt drip in neutral) State your assumptions, if there are any. d) Suddenly the neutral wire of the circuit is broken. Estimate the new currents in the first phase, i.e. Phase L1. State your assumptions, if there are any.
Is it required to do earthing in 2nd shop if earthed armoured cable is laid from 1st shop ?
how harmonics generated in induction furnance? how minimise it?
Define filter?
Please define ampere?
What are different types of control systems?
If symmetrical fault occurs at the terminal of a synchronous motor then how the motor will act...explain it..
Difference between drift current and diffusion current?
