Answer / adinarayana.k

two earth pits connected in parallel(short the two earth
pits together and take two ends to connent building

Answer / mohamed

if earth mesh is laid during construction put earth pit in
each corner of the building.Interconnect the earth pits with
proper sized cu. ACSR conductor

Answer / hitesh

When Two or more Earth pits are interconnected its called a mesh or Grid. and value of earth resistance should be less than 1 ohm for a grid.

I COMPLITED MY B.TECH AND 10TH CLASS WITH 70%MARKS BUT 12TH CLASS 55%MARKS..CAN I GET INDIAN RAILWAY RECUREMENT EXAMINATION?

0 Answers   UPSC,

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Why we did not feel electric shock in electric train?

1 Answers   NTPC,

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How can we calculate the rating of a transformer suppose if load is 1000KW?Formula?

3 Answers  

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what is the primary current in 415/415 v when secondry of dry type transformer is shorted.?

3 Answers  

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what type of motor is used in washing machine

8 Answers  

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How to reduce current flowing in neutral due to unbalanced load conditions in a three phase system.

1 Answers   IOCL, wbsedcl,

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What is your acheivements

0 Answers  

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1. A 380 / 220 V r.m.s. 3-phase 4-wire circuit carries loads of 8 + j8.1 ohm; 4 + j4.1 ohm; and 2 +j2.1 ohmin the three phases respectively. The length of the circuit is 100 m, and the resistivity of the phase conductors is 0.0005 Ω/m. The neutral conductor is of the same size as the phase conductors. a) Select a reference angle 0for the first phase. Then write down the three phase voltages in both polar format and complex number format. b) Make appropriate assumptions, and take temperature effects on resistance is insignificant. Calculate the currents in the three phases. (Note: Determine conductor resistance, and apply Kirchhoff’s Voltage Law) Based on the result, suggest a main switch rating for the circuit. c) Show your preferred direction of neutral current in a diagram, and then determine its value. (Note: Apply superposition principle, and Kirchhoff’s Current Law) Use its magnitude to show that in this circuit, the unbalanced load may increase the voltage drop in some of the phases. (Note: Also observe the common volt drip in neutral) State your assumptions, if there are any. d) Suddenly the neutral wire of the circuit is broken. Estimate the new currents in the first phase, i.e. Phase L1. State your assumptions, if there are any.

0 Answers  

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what are the analog quality input for protection function?what are minimum reqiments?

0 Answers  

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A charge of 240 C is transferred in 2 minutes. The current flowing is:(a) 480A(b) 120A(c) 2A(d) 8A

2 Answers  

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funtion of choke

4 Answers   L&T,

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we often use the word HT (high tension) line.or we say HT switch gear, whats does HT basically mean. is it different from high voltage.

1 Answers  

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