Answer / bhatt

Earth pit resistance is measured by Earth tester, Earth
tester have four terminals P1,P2,C1,C2 i.e. Two potential &
Two Current terminals. while earth pit testing, P2 & C2 are
shorted and C1 connected to current spike(Conductive rod)
which should be drived into soil at around 30 meter
distance from earth pit and P1 is connected to potential
spike(Conductive rod) drived at around 15 mtr away from
earth pit in the direction of current spikes.By rotating
the handle of meter(in old meters) or by pressing test
button (in new type meter) one can get earth resistance.Now
Potential spikes are drived at different locations toward
earth pit and current spike side and a curve between
distance and resistance is plotted. Earth resistance will
be platue of the graph.In this meter current is passed
between earth pit and current spike and potential is
measured between potential spike and earth pit. Ratio
between Voltage measured and current passed thrugh the
earth is the resitance of earth pit.

Answer / satya narayan padhy

Earth pit resistance is measured by Earth tester, Earth
tester have four terminals P1,P2,C1,C2 i.e. Two potential &
Two Current terminals. while earth pit testing, P2 & C2 are
shorted and C1 connected to current spike(Conductive rod)
which should be drived into soil at around 30 meter
distance from earth pit and P1 is connected to potential
spike(Conductive rod) drived at around 15 mtr away from
earth pit in the opposite direction of current spikes.By
rotating
the handle of meter(in old meters) or by pressing test
button (in new type meter) one can get earth resistance.Now
Potential spikes are drived at different locations toward
earth pit and current spike side and a curve between
distance and resistance is plotted. Earth resistance will
be platue of the graph.In this meter current is passed
between earth pit and current spike and potential is
measured between potential spike and earth pit. Ratio
between Voltage measured and current passed thrugh the
earth is the resitance of earth pit.

Answer / salman hazari

Earth pit testing is measured by megger or earth pit tester. There are 4 terminals in megger. P1, P2, C1, C2, it means there are two potential terminals and two current terminals. while measuring earth pit resistance we have the requirement of 3 wires. one wire will be connected between one earth electrode which has drived in ground and P1 point of tester from a distance of 30 meters from earth pit. 2nd wire will be connected between one earth electrode which has drived in ground and C1 point of tester from a distance of 15 meters from earth pit. Both electrodes in opposite direction. Shorted P2 & C2 terminal by a small piece of wire. connect one wire to the Earth pit from shorted wire. Move the handle of megger. you will get the resistance value. As theoretically value should be 0 ohm. But practically it should be less then 1 ohm.

Thanks
salman Hazari
chief Engineer
Keys hotel
pimpri, pune

Answer / sabir khan

It's measure by earth tester

Answer / karthik.j

The earth pit resistance is measured by Megger meter. This
measurement will be done on every two months once in the site.

Answer / upen

It's measure by earth tester it must less then 1mega ohm 0.02 is better

Answer / susanta paul

Earth pit resistance is measured by Meggar.This measurement will be done on every year once in the site.

What is the difference between acs 550 & acs 850

0 Answers   Madhucon,

Spacing of Transformers ratings are 10kva,15kva,25kva,63kva,110kva,150kva .........so on Q) Why transformer are not manufactured having ratings in between or other than these standard ratings ?

3 Answers  

how do we calculate length of starting time and repeated starting of a direct online starter?

0 Answers  

what is negative phase sequence

1 Answers  

Hysteresis loss in a core is due to what reason or property of the material used for that core?

1 Answers  

How much load with stand the copper cable by sq mm apro..

1 Answers   L&T, Taj Group,

Compare salient pole and cylindrical rotor machines.

0 Answers  

what is ELCB?

10 Answers   Wipro,

why capacitor using the induction motor?

5 Answers  

We have a 62.5 KVA DG with Leyland engine and kirloskar slipring alternator. We have earthed the neutral, and another earthing for the dg body. is it necessary to isolate the dg foundation with rubber pads?

1 Answers  

What are the neccessary safety arrangements before commissioning of HV substation?

1 Answers  

A power transformer 4MVA/11KV/0.415Kv has been out of use in 12years. what maintenance actions/test need to be carried out before energizing.

0 Answers