Answer / k.k dash

kindly see the breaking capacity of 250 amp mccb,if it trips more than two times kindly replace the mccb with new breaking capacity such as 25 ka, 35 ka,or 50 ka,so that it capable for taking the current

I find that underground strip-armoiured,4core,LT PVC cables in an earthed power distribution sytem are occasionly found in charred condition-with no trace of it except ash. Is this because of no proper earth connection/continuity (giving rising to high armour resistance)in the joint enroute or because of insufficient capability (again due to high armour resistance)of cable-armour to carry fault current or due to neglected /unprotected overloading of the cable or due to high armour currents caused by power thefts where only phase(s) are unauthorisely tapped & at the point of poer consumption earth terminal is established by burring underground a not so good earthing rod (or using an underground water pipe for the purpose)

1 Answers  

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1-What is the difference between absorption factor and polarization factor in insulation resistance test in transformers? and why we inject until ten minutes to get polarization factor?

1 Answers  

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what is the value of the earth resistance in mositure place

3 Answers   HCL,

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what is the significance of tan delta testing?explain the theory?

7 Answers  

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how to measure genset CT coil range?

1 Answers  

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what is mathematical relation between ac to dc current how will convert Iac=50amp to Idc

7 Answers  

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how we can check that any motor is faulty may be single phase or three phase?

2 Answers   MAHINDRA,

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what are the duty ratings in DG sets?

1 Answers   L&T,

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how to calculate the watts from the tr

1 Answers  

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transmisancy eficencey calculation formula

1 Answers  

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what is the difference between 2 way and 4 pole selector switch???

0 Answers   Allied Group,

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11kv = LT 440v , how many amp.supose 440v side 5000 amp curent drown

2 Answers   Motwane,

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