Answer / nirajan poudel

9 kv surge arrestor is used in 11 kv (incoming feeder)
line so that to prevent the high voltage entering the main
substation when lightening occurs.The lightening arrestors
do not let the lightening to fall on the station.If some
lightening occurs the arrester pulls the lightening and
ground it to the earth.The LA are grounded to the earth.It
works with an angle of 30 to 40 degree making a cone.

Answer / anshul sharma

you fool l.a. is also used in 11kv line if you don't know this much then your a dam fool...

Answer / parag

1st of all lightening arrestors are not used to bypass
direct lightning,for direct lightning we use earth wire
running on the top of the power lines,L.A is used to bypass
switching surges,it is a non linear resistor and having
breaking voltage more than power frequency voltage so that
under normal operating condition it provides high resistance
& under abnormal condition it provides low resistance to
bypass SWITCHING SURGES.

Answer / gopal manda

dear ansulji dont angry,u r right,lightning arester is also
use in 11kv network,it placed in various places,it placed
at the top of double pole stracture which is comming b/w
feeder line,gss, arestor is also use in SFU(switch fuse
unit) and it aslo used in single phase transformer,which is
used for rural power distribution,lightning arrestor is use
to ground the lightning phenomena voltage which range is
1000kv and above

Answer / rakesh kumar rathore, jen jvvn

Las are used at s/s

Answer / kiranganesh

its 45 kilonewton

Answer / vysakh

11 kv LA must be used for 11kv feeders.It act as a near insulator till the break down voltage & act as a conductor there after.

Answer / jay gohil

L.A is used in 66kv Substation,not are used in 1kv line.

why should we place 9KV lightning arrestors in 11KV substation ?

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