Answer / arun

if the voltage is less than nominal lagging..equal to
nominal unity..higher than nominal..leading pf

Answer / ac

Hi mr arun can u explain in detail about nominal?

Answer / vetrivel

Nominal voltage means the rated voltage

WHAT IS DIFFERENCE BETWEEN idmt and instentanous relay? is idmt is used as back up protection or else?or when instantenous relay saturates IDMT will operate???

1 Answers   BK, REL,

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Why do we require transformer with less specific weight if supply frequency is increased?

0 Answers  

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What are the uses of MCB & ELCB ?

2 Answers  

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What is the real use of reactive power in a electrical system other than loss (inductive &capacitive).I want to know its real physical significance.

0 Answers  

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what is the use of earthing?

1 Answers   CPCL,

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how can maintain the power factor and why and this is how do work tell us

0 Answers   Wipro,

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exact definition of reactive power in power system

2 Answers   Sreetech,

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In transformer how measure the winding temperature ?

5 Answers  

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Hi, I've just got into my electrical engineering course and I need some help with a question of mine here. During a site visit, we were shown a main LT panel which has switchgears, ammeters and different kinds of relays and the distribution network from that panel. In the main LT panel I've noted down the current readings as Ir - 163A, Iy - 150A and Ib - 147A. The Line to Line voltage is 415 V at 50 Hz and Line to Neutral voltage is 230V at 50 Hz. From the above details, how would I calculate the kVA rating of transformer? The primary side voltage of the transformer is 11 kV and the secondary side voltage is 415V and the frequency is 50 Hz.

2 Answers  

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What is the operational principle of direct current current transformer and direct current potential transformer?if possible plz reply with ckt. diagram.

1 Answers  

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what is the function of anti-pumping in circuit breaker?

20 Answers   Aditya Birla, INEL, NCC,

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WHAT HAPPENING TO TRANSFORMER???? i have the step down transformer rating 230/12v, power rating something.,,, ok. suppose iam giving 12v to secondary side,what will happen on primary side.,,,

6 Answers   Coastal Energen,

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