Answer / susant kumar acharjya

you can measure the earth pit through meggar.
take two rod of 45 cm . one rod erect 30 mtr from earth pit and connect a cable with that rod and the second end connect at earth of meggar,2nd rod 90 degree to first rod at the distance of 40 mtr from the earth pit again connect with cable and the 2nd of with meggar guard. two probe of meggar connect to the earth pipe . rotate the meggar u wil get les than 1 ohm

Answer / p.seenichamy

The minimum valus of single earth pit is less than 1 ohm

Answer / mahaveer sahu

Earth pit value can be measured by digital earth tester and the minimum value of single earth pit should be less than 2 ohm

while selecting transformers for 33 kva feeder normally we ask for 33/433 kv why not 33/415

1 Answers  

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Before i went to bed my master bathroom lights were working fine. At 2 am, when I went to use the lights, none of them were working. The outlets throughout the bathroom work, but the lights and fan above the toilet don't. I have two panels of switches. The one panel has four switches. One of the switches turns on the hall light, and that works. The other three are to other lights, and they don't. The other panel has three switches. One of those is to the fan, and the other is to a light above the toilet. The other is a to light that is also on that other panel. I tried the breakers, and the one that turns off the outlets, marked for the bathrooom, turns on and off the outlets. None seemed to be tripped. I checked the lightbulbs, and they are fine. Please help

2 Answers  

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a solenoid of inductance 250mH and resistance 10ohm is connected to a battery. the time taken for the magnetic energy to reach 1/4th of its maximum value will be?

1 Answers   SSC,

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What is Autodialer used in FAS????

2 Answers   Emerson,

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in catridge heeter  watts =110, 260 v ,  i checked in multimeeter meeter shows 50 ohms but oms law r=v square /w  260*260=67600, and 67600/110=614.5 ohms  how to caluclate exact ohms in heetre s 

2 Answers  

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rrb question

0 Answers  

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if we supply to secondary winding how transformer work?

2 Answers  

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Sir We have a REF relay connected to 10MVA(Y-Y) Transformer.on External earth fault REF relay trips along with earth fault relay.The REF relay has no complant as we tested relay.Why is it happening?

3 Answers   KSEB,

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do any one help me to get "C" license,, i have doubts ,,, if mediators ter pls call me,, my no is 8056640042

0 Answers  

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WHY EXCITATION OF SYNCHRONOUS MACHINE IS DC NOT AC

8 Answers   NTPC,

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IN A DY11 GROUP DISTRIBUTION TRANSFORMER WITH NEUTRAL EARTHED, WHAT WILL HAPPEN TO THE SYSTEM VOLTAGE & THE EQUIPMENTS IF EARTH GETS OPEN ON LOAD?

2 Answers  

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-What shall be short circuit current of LV switchgear for a 1000 kva, 11.415kv, 3 phase tranformer with 5% reactance.

0 Answers  

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