Classify drilling machines.

0 Answers   Ashok Leyland,

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What is mean by % impedance of transformer? detail explanations expected.

1 Answers   FCUK,

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How many types of isolator is available for H.T.lines? which one is best for sub-station?

4 Answers  

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1)Why potential transformer primary site grounded? 2)can be loop between neutral & body for grounding? 3)What is the difference between ELCB &RCCB? 4)Why we use iron core in transformer insted of wooden core? 5)what is the principle of excitation? 6)Why we test the core balance test for transformer? 7)what is creepage?What is the creepage length for insulators at different voltages? 8)How much type of relays used for differential protection of generator,transformer & busbar protection?

5 Answers  

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1.differance between onload ups and off line ups.

1 Answers   CTS,

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What is the mechanism of WTI

0 Answers   JBS,

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in 11kv generators the neutral point is connected to earth via earth coil while in the 33 / 11 kv transformer the neutral point is connected to earth via earth resistor why? 

1 Answers  

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Mention the disadvantages of low power factor?

0 Answers  

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Hi Suppose we have a wye/wye transformer which is grounded at both sides,in this situation, do we have ay ground transformer? in other words, ground transformer can do any thing more (while we have nuetral wire in both sides)? As the last question, what about 3rd harmonic? we have two choices: first using wye/delta transformer + ground transformer and second using wye/wye earthed connection.in the former choice, we dont have 3rd harmoonic at the secondary side but what about Yn/yn conection? do we suffer from 3rd harmonic in the Yn/yn connection?

0 Answers  

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identify the components of the tube light and explain how they function???wat is inside the fluroscent tube???how it works???

7 Answers   NTPC, TPL,

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what is the maximim current drawn by 1 phase and three phase welding machine

0 Answers  

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Can someone tell me how to calculate the size of a power cable? What are the factors involved in cable sizing?

5 Answers  

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