Answer / asmita

Gravels/metal is used in T/F yard for following purposes-
1.For providing gd earthing as it prevents growing of gross.
2.it prevents travelling of creatures like snake,rats etc
which may result in Short ckt if touchd live parts.
3.In case of oil leakage from C.B.it is well distributed
due to metal n doesnot result in fire.
4.Reason of Step potential n touch potential.

Answer / varun kumar

gravel surface increases the safety limit for touch and
step potential and hence our same design of earthing grid
becomes more safer.

Answer / farhan

ans. 5 countinued and also when the heavy raining water can
suc not stored on floor.

Answer / k.vijayakumar

Gravels having good earthing resistance, So that only we
have used for the same.

Answer / rakesh

gravels are used because gravels have less resistance due
to which it is very effective for earthing.

Answer / s.karthik

The gravels mainly serves two purposes,

since the core of the transformer experiences high
mechanical stresses which makes the transformer core vibrate
coz of which the complete apparatus vibrates,the poured
gravel absorbs these vibrations.

Secondly,the gravels provides a good earthing path for the
transformer.

why on delay timer used for fully automatic star delta starter?

0 Answers  

What are the types of power in electrical power?

0 Answers  

What is mean by staling?

2 Answers   UPPCL,

What should be setting for alarm,tripping and cooling fan on for power transformer's oil temp. and winding temp. indicator?

0 Answers  

can we produce cosine wave instead of sine wave? will it usefull?

4 Answers   BARC,

Sir, plz tell me the relation b/w KW and frequency in Variable frequency Drive?

2 Answers  

What is High Frequency Grounding????

2 Answers   Emerson,

what is the meaning of harmonic in AC waves and when which are prduce and what is the effects on line and give any other information about harmonics

1 Answers  

MCCB 400 Amps 50KA 430Volt AC What is mean by 50KA

16 Answers  

what will be fault level of 11 KV , 2000 A ELECTRICAL SYSTEM?

4 Answers  

What should be the protection scheme for a 15kw, 3-phase motor working in a lathe machine.

0 Answers  

what will happen if we give a dc supply to a transformer.?

10 Answers