Answer / wareagle

Explain in detail what ground free electricity is.

Answer / dheeraj

Grounding of large installation is necessary for earth fault detection and timely tripping of CBs. Without grounding hazardous potential may develop over the equipments which causes damage to the costly equipments.

Answer / kj

If you mean that we do not earth the neutral?

In a perfect situation this would be good and reduce the
risk of electric shock.

Unfortunately in real life it can only work in small
situations - using an isolation transformer for a handheld
light for example.

In large installations there is always a risk of failures
of insulation or machines. This would then cause a
connection of the neutral or phase to earth and therefore
it would no longer be ground free. The other thing is that
no insulation is perfect and there will always be leakage
with the same result.

What is GND Transformer?

2 Answers  

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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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why not feeling shock while touching rotor shaft of induction motor during running condition? during running condition emf induced in rotor.

1 Answers  

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WHAT IS SERVO MOTOR

1 Answers   Fluxys, Infosys,

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What is earth fault?

3 Answers  

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what is short circuit force ? How to calculate it for Panel?

1 Answers   Bilt,

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Where can I get CPWD electrical specifications & Shedule of rates? Please help me

0 Answers  

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HOW TO CALCULATE THE HEAT AND LOAD OF LT-SUBSTATION WHICH CONTAINS 2*1MVA TRANSFORMERS,LT SWITCH BOARD,MLDB,ACB,BUSBAR,ETC...?

0 Answers  

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What is the function of mid point voltage in battery bank

1 Answers   Jindal Steel and Power,

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at which voltage level arcing ground is occurs ??????????

0 Answers   TATA,

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what do you mean by class PS CT and what are technical details needed for calculating it?

0 Answers  

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A long transmission line is limited by - a)thermal limited b)voltage limited c)stability limited d) L,C limited please explain with proper reason.

1 Answers  

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