Answer / jaswant rajawat

Bus earthing truck is use to earth bus bars of switchboard
at the time of maintenance of bus bars. For this we have to
remove incomer breaker panel and insert bus earthing truck
so that bus bars will remain earthed during maintenance.

Cable earthing truck is use to earth incoming cable or
outgoing feeder cable in switchboard during maintenance at
transformer end or motor terminal box.

Answer / bala.a

for saftey point of view and reduced to time for providing
Individual earthing system.

Answer / sounak chatterjee

In transmission and distribution lines the flow of of power depends upon mode of operation.There are two ways ,one from importing power from grid system,and the other one is exporting power to grid. There are certain switchboards whose sole application is to deliver power from system and as well as importing power from the system. In case of only importing only bus side earthing truck will suffice the purpose but in case of dual operation cable side earthing truck too are required.Since flow of power also from downstream to upstream any recurrence of negative feedback will get diminished by the use of cable side earthing truck.

Answer / arumugam

Bus earth is also called plate earth. It is using when the
motor KW is higher for example above 20 KW. Incase of any
short circuit in the motor the earth will takes place the
short circuit to earth for protect

Cable earth is using when the Motor KW is below the 20KW.

Answer / arumugam

Bus earth is also called plate earth. It is using when the
motor KW is higher for example above 20 KW. Incase of any
short circuit in the motor the earth will takes place the
short circuit to earth for protect

Cable earth is using when the Motor KW is below the 20KW.

what clearance required for 4.5 mva dry type transformer?

0 Answers   SPS,

what is the function of a commutator in a dc generator?

14 Answers   College School Exams Tests, NTPC, TCS,

What must be the distance between the Earth pit which are grounded from two different sources. Example: Distance between the earth pit for LV Panel-1 & 2

0 Answers  

what is is the potential diffrence between two phase ?

3 Answers   Bhel,

DEAR SIR/MADAM,CLEARLY EXPLAIN ABOUT CRAWLING AND COGGING EFFECTS IN INDUCTION MOTOR.

0 Answers  

At what load maximum effiecency will be obtained Distribution transformer and Genarating transformer Pls clarify?

4 Answers  

what is the difference between analog and digital signal?

3 Answers  

what is timing for mccb 800A tripping?

1 Answers   L&T,

Can anybody explain me the electrical circuit of indian railways to drive electrical engines(LOCOMOTIVES)? How does overhead lines work in the circuit to drive different trains on the same track?

1 Answers  

What is Neutral Transformer? what is the use of this?

4 Answers  

acb(AIR CIRCUIT BREAKER)NOT CHARGING AUTO

0 Answers  

Sir i completed diploma in electrical from govt. Polytechnic dhanbad (jharkhand) . In 2012 . Now i am working in sail iisco plant . Sir i want to get electrical supervisory certificate for applying in ongc . From where i get this certificate please guide me procedure step by step

1 Answers