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Question
what is a lightning arrester???
 Question Submitted By :: Electrical-Engineering
I also faced this Question!!     Answer Posted By  
 
Answer
# 1
lightning arrester is metallic device which is capable of
conducting electricity, which is placed above the multi
storeyed buildings and transformers and other receiving
stations,sub stations.the main purpose of lightning arrester
is to protect the buildings and equipments from
thunder&lightning during rainy seasons..this device will be
connected to the earth from the top of the building through
a wire,which is capable of sending high voltage into earth
 
Is This Answer Correct ?    30 Yes 1 No
Manthesh.patil
 
Answer
# 2
Lightning arrester is a protective device which conduct
high voltages surges on the power system to the ground.It
consists of spark gap which is connected in series with the
non-variable resistance,its connection is that one end is
connected to the terminal of the equipment which is to be
protected and other end is effectively grounded.

The property of non-variable resistance is that it offers
low resistance when voltage is high.
 
Is This Answer Correct ?    23 Yes 1 No
Manish Kumar Meena
 
 
 
Answer
# 3
This is a human made ystem which protects the external part
of building, tower, Mall etc from lightning which occurs
during thunderstorms, and sometimes during volcanic
eruptions or dust storms, due to an atmospheric discharge
of electricity between cloud to cloud, clouds to earth.
 
Is This Answer Correct ?    19 Yes 3 No
Ram Krishna Sarvadhar
 
Answer
# 4
LA is a non-linear resistor i.e. during normal condition it
offer high resistance but during abnormal condition
(abnormal voltage ) it acts as a low resistor thus allow
the heavy fault current and provide path to ground.
It is pointed one as charge resides/attracted by pointed
object and always placed at top of switchyard/building.
 
Is This Answer Correct ?    17 Yes 1 No
Kishore
 
Answer
# 5
Lightning arrester is a device that is used for the
protection of electrcal devices and electrical system e.g at
the power station it is installed at power transformer ,
main purpose is to protect system against lightning impulse
.. it is non linear resistance normally open in case of
lightning impulse it grounds all the voltage and protects
systen against extra high voltage
 
Is This Answer Correct ?    5 Yes 1 No
Abubakar Siddiq
 
Answer
# 6
Lightning arrester is a protective device which conduct
high voltages surges on the power system to the ground.
 
Is This Answer Correct ?    3 Yes 1 No
Swetha
 
Answer
# 7
LA is non-linear resister.LA is installed on transmission
line,transformer and other electrical equipment.LA are used
to protect the equipment against lightning-stroke(high
voltage) and provide path from top to ground so lightning
stroke directly into ground.
 
Is This Answer Correct ?    3 Yes 1 No
Kumavat Nareshkumar .c.
 
Answer
# 8
Lighting arrester is a proctective arrangment which provide
protection against high voltage surge. During lighting and
other condition when high voltage surge genarate then it
provide path for surge through earth.
 
Is This Answer Correct ?    3 Yes 1 No
Niranjan
 
Answer
# 9
lightning arrestor is a device which prevents the equipment
and building from voltage surges in any of them it may be
due to any reasons this provides low resistance path to the
electricity on the terminal of the device and top of the
buildings to flow the charge to ground...
 
Is This Answer Correct ?    1 Yes 0 No
K.kumar
 
Answer
# 10
A protective device for electrical equipment that reduces excessive voltage resulting from lightning to a safe level by grounding the discharge. 
Is This Answer Correct ?    0 Yes 0 No
Benudhar Sahu
 

 
 
 
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an off load but energized 11/0.4 KV, 1250 KVA T/F has a power factor of 0.65(capacitive)..!! why is it so, though T/F being an inductive device ??   4
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What is the meaning of BUS? KLG-Systel 18
why we can choose induction machine in wind mill? why can`t use synchronous machine?   3
sir, i want to know the calculation for find rated current for cable sizes.(both copper & aluminium) with examole. please sir for example: 35sq.mm al.cable is withstands for how many amps? is suitable for 45kw motor? L&T 4
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WHY CFL can't made in shape of bulb.   5
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