Answer / ramkumar

Earth pit resistance must be less than 1 ohm then only we
have to get good earthing

Answer / pradhyumn

Should be less than unity.

Answer / neelakandan

earth pit value is not constant it's very from soil and
it's value less than unity

Answer / bhatt

For important installations such as Sub station and data
centre, it should be less than 1 Ohm. It can be upto 5 ohm
for residential aplication.

Answer / shimran

less then 1 mean 0.10 to o.2 ohm

Answer / koti

for Individual pit; no specific fig ( in general max of 5 ohm)by standards but grid should be less than 1 ohm.

Answer / g narayanarao

It should be less than 1ohm in case of switch yards and It
should be less than 2ohms for industrial applications and
for other demostic applications it should be less than 5ohms

what is meant by impedence? can you describe easy becuse iam not well familier in electrical?

2 Answers  

IN OLTC we observed "OUT OF STEP" Alarm, we have two different transformer, when both are in parallel this type of alarm observed. what's the meaning of this alarm and why it occurs???

3 Answers  

low voltage means how much voltage? extra low voltage means how much voltage? medium voltage means hos much voltage? high voltage means how much voltage? Ex: low voltage - 1volt to 240volt like this

3 Answers  

Why Transformer Neutral having one earth pit ( more earth electrode resistance) whereas body have many earth pit ( less earth electrode resistance)?

0 Answers   OPS,

What is mean by diversity Fator?

7 Answers  

How can we parallel two transformer with vector gorup YNd11 and YNd1?How is connection two transformer GT?

3 Answers  

i am using star-delta connections with reverse/forward direction motion of the 75hp induction motor.What should be the ratings of Main,Delta and Star contactors and why?

1 Answers  

Is electro plating what type of load whether resistive, inductive or capacitive loads

0 Answers   Apollo,

why we use 6nos of C.Ts on 11kv incoming?

2 Answers  

how can i get the formula to find out the cable size if i know the load of main fuse protection.

0 Answers  

If I need to purchase a step-down transformer (from three phase 33kV 50Hz to 400/230V), what additional information do I need from the main supply power line?

1 Answers   MahaDiscom,

What will be the current rating of Main switch for 80 kVAR panel

1 Answers