Answer / vinod

for 3 phase balance phase voltage, earth fault detection
and humen/equipment safety

Answer / kavi

Fcuk damnit, distribution transformer earthing is required
to provide a zero reference for single phase loads, assuming
TT distribution. It balances the phase currents. Balanced
loads rarely exists on distn trx. Also, the third harmonic
current generated due to magnetisation of the core will be
grounded.
Power tx require grounding for the latter purpose and for
insulation reasons. more economical to fabricate a tx with
phase voltage insulation than delta.

Answer / ayid

for balancing purpose and safety particularly 3phase tx

Answer / chinmaya

Earthing is required for grounding the excess current.

Answer / sarvesh singh

earthing is done as to complete the circuit. Else it could
also be connected to a neutral wire. In many houses there
is one wire connection i.e. live wire and for the neutral
we use as a ground. in transformer in primary there could
be some current in neutral wire so we need earhing so as to
have proper output voltage

why we cannot apply ohms law to transformer?

3 Answers  

please send privious years question papers of jindal steel and power ltd.My e mail id is rajanikant.sngh@gmail.com

0 Answers   Jindal,

description about dry type transformers

0 Answers  

why HV test for cables?.why 0.7times?

1 Answers   Bosch, Prince Food Products,

Differentiate between ideal and non-ideal voltage sources?

0 Answers  

If a generator of generating station produces 100MW rated output then what will be the rating of the step-up transformer connected to it?

5 Answers  

what is power factor

4 Answers  

why grid failure happens?

1 Answers  

KVA transformer of different frequencies of 50hz,100hz,500hz&1000hz. which one of these transformer has big size? Give reason

4 Answers   Suzlon,

What should be the voltage between Neutral and Ground in secondary side of the step down transformer (230 V to 110 V) with no load condition?

4 Answers  

How to convert resistance value at 20 degree to 90 degree?

2 Answers  

Which element has power dissipated in it when the source is removed ?

2 Answers   SSC,