Answer / guest

N=3L(L-1)+1 Where N=No of strand L=No of layer of cable. ie A single layer(single strand) N=3*1(1-1)+1=1 A double layer cable N=3*2(2-1)+1=7 And in three layer cable N=3*3(3-1)+1=19 And . so on ........ But Now-a-days some manufacuture company does not supply the exact size (No of strand) of cable for economic benefit.

a new 3ph induction motor doesn't rotates their ratted speed, why ?

2 Answers   Sail,

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conditions for parallel operation of dc generators

4 Answers  

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1)what is the function of a frequency inverter? 2)If a few frequency inverter are connected onto a device network,what are the two setting that will ensure the frequency inverter work properly on the network. 3)whats is the name of the input sensor for weigher? 4)How to confirm that the load cellis faulty? 5)Describe briefly the steps to validate that the weigher is working properly? 6)Describe the procedure to validate the flowmeter accuracy? 7)Describe briefly the steps to validate that the tempreture sensor/transformer is working properly. 8)what is the adjustment that need to be done when you are calibrating the temperature transmitter ? 9)what are the safety measures to be taken before disconnecting motor for rewinding. 10)whats is the synchronous speed in rpm of typical 4pole 50hz motor? 11)whats is the formula for kw, ohm's law 12)if a 3phase motor is rated 3kw,415vac,what is it's rated ampere?

0 Answers  

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In Energy meter How many rotation Equal to one unit.

3 Answers  

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why the alternator rating in kva generator in kw.

2 Answers  

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How to operate a ac chilar plant?

0 Answers  

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What is frequency?

4 Answers   BTCL, TCS,

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What type of input will the OLTC indicator will accept or what type of output the OLTC will produce to monitor it's position at remote location.

1 Answers   amps,

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why current flow throgh conductor.

2 Answers  

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How to calculate Number of Earthing Pits....???

0 Answers  

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What is the differance between negative dc voltage and positive dc voltage because some circuit uses -24,-5,-12,- 15,volt dc supply

10 Answers   eLab, Hero Honda, NTPC, Suzlon, Teradyne,

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how techometer works and how it will be connected above the flywheel in dg system

1 Answers  

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