what are the advantages and disadvantages of oil filled cables
over XLPE cables
Answers were Sorted based on User's Feedback
Answer / k.prakashchandra
Adv;-Voids are avoided and hence higher voltage is
possible,temp range and dielectric strength are increased ,
leakage can be detected easily. Disadv:-high initial cost
,laying and jointing are complicated.
|Is This Answer Correct ?||12 Yes||1 No|
now most of the HT and EHV cables are with XLPE insulation.
earlier, in mid 70's HT cable are insulated with PILC(paper
insulated and lead covered. OIL is filled to reduce moisture
in paper. disd of PILC cables is very heavy almost double
the weight of XLPE cable but adv is the chance of voids are
very less in PILC cable. Lead is not ECO-friendly,it is
almost banned in europe, US and few countries in ASIA. Cost
is very High as compare to XLPE cable. whereas XLPE cable
are lighter in weight.Long life,easy to handle. jointing is
|Is This Answer Correct ?||5 Yes||1 No|
Answer / jason008
The oil cable was designed very earlier way before the 70.
There are earlier lead sheath designed cable but the newer
cables are alum sheath this change decreases the chance of
a cable leak mid cable.The cable oil fills the butt gap
which are there to allow the cable be bent without tearing
the paper insulation.The oil is the second form of
insulation it has a very goog dieletric stregth it also is
there to asborb gases the may be made during in service
operation. This allows us to see what is happening in the
cable. partial discharge overloading ect ect these cables
are opererated at very high voltages 33kv 66kv 132kv 225kv
uk 330kv aust 400kv uk they are now starting to produce
xlpe with better dielectric which are almost similar to oil
cable losses.the xlpe is a negative pressure cable which
may allow for the migration of water into the cable. xlpe
is more maintenance free except for link boxes. The oil
these days are biodegrable they us t3788 dusket make this.
|Is This Answer Correct ?||0 Yes||0 No|
For DG or Transformer body earthing, is it necessary to terminate the earth bus to earth pit directly? If not terminated to earth pit directly in earth pit and connected to any common bus strip which ultimately connects to earth pit, what will be the pros and cons?
how to calculate the voltage drop in electrical cable while laying cables?
What is the name of powder which is used in inner side of a cable? and purpose?
what is the difference b/w single and three phase circuits?
how to get bearing & winding temperature of an induction motor?
working principal of online ups
What is mimimum di -electric strength value for 33 KV transformer OLTC oil
Why we are putting off the APFC(automatic power factor control) panel while the generator is running?
why the neutral line is not giving shock to us if we touch it ?
1) How to calculate battery backup for ups as well as solar with complete formula elaborately......
which type of ICs can be used in resonant power converter?
How the Transformer oil testing is done & Why oil dielectric goes LOW & what is solution for that ??