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 are the RGGVY, APDRP, RE?

3 Answers  

If there is volagte between earth and neutral, what should be the reason ? and solution * What should be allowable limit in case, if the voltage between earth and neutral exist ? / OR what is limit for safe voltage between earth and neutral?

3 Answers  

How to resolve if Diesel generator stop while running ?

0 Answers   Toyota,

If the feeder rating is 7.5 kw or 10 HP star-delta feeder, MCCB is taken as 63 a, contactors-32 a, how much will be the OLR rating or which range OLR should be considered when we concern about type-2 coordination?

0 Answers  

why diesel tank is earthed

1 Answers   ABB, NTPC,

DO MEGGER TEST APPLIED ON SURGE ARRESTOR? IF YES THEN WHAT ARE THE ACCEPTED R VALUE REQUIRED FOR SURGE ARRESTORS FOR VOLTAGE LEVEL 11KV, 33KV

2 Answers  

What is Difference Between Induction Motor & Servo Motor

31 Answers   Jindal, Kirloskar, KTTM, Star Technocrates, Toyota,

whenever any squirrel or a crow falls on the transformer input line then there is a big explosion and 440 volts of power is being discharged through the neutral line due to which appliances in off mode are also burned.we have earthing for the transformer as well as the bus bar chamber.why is it happening?

1 Answers  

Wtat is vaccum currcuit breaker.define with cause of used.and where be use it Devise .

1 Answers  

Is there a standard depth of gravel fill in Substation Switchyard? Please give a design/drawing. Thank you.

0 Answers  

What is high frequency grounding????Applications........

1 Answers   Emerson,

H.t motor 6600 volt to same motor lt supply 440volt supply applyed to h.t motor to effect....

0 Answers   Essar,