what is corona effect

3 Answers  

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Why generally the transformer primary is connected in star & secondary in delta

7 Answers  

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what is the lemen of a single 5mm 13000mcd white led pls reply

1 Answers   Eskom, Sona,

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I BOUGHT A HAVELLS ACCL WITH GENERATOR STOP FASCILITY(i.e- BASICALLY IT IS A AUTO CHANGE OVER SWITCH) FOR MY HONDA EXK 2000S HOME GENERATOR (WHICH START IN PETROL & RUN IN KEROSENE). ACCL HAS 8 POINT. 2 FOR MAINS(PH & NUE), 2 FOR LOAD, 2 FOR GEN AND 2 FOR IGNITION POINT(X1 & X2). THE IGNITION POINT IS SPECIALLY FOR AUTO ENGINE STOP WHEN MAINS POWER RESTORE. I CONNECT THIS X1 & X2 POINT TO THE GENERATOR STATER MOTOR & EARTHING POINT. BUT WHEN MAINS FAILS THE GENERATOR COULD NOT START, BUT WHEN DISCONNECT THOSE X1 OR X2 POINT, THEN THE GENERATOR START. BUT WHEN MAINS ON THEN THE GENERATOR SHOULD START, AND WHEN I OFF THE MAINS THE GENERATOR AUTOMATICALLY STOP. PLESE HELP ME HOW I STOP THE GENERATOR AUTOMATICALLY WHEN THE MAINS RESTORE.

2 Answers   Honda,

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Why 50hz and 60hz frequencies are used by the world, why they are not taking 55hz?

3 Answers  

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The unit of quantity of electricity is the:(a) volt(b) coulomb(c) ohm(d) joule

1 Answers  

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How the size of electic machine vary with the sped? Between slow and fast running machines of equal ratings, which one is more economical to design?

1 Answers  

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pls someone send me sample question papers along with the key.thanks in advance

0 Answers   HPCL,

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What is Star Delta Connection, where it is applied & what for it is used

4 Answers   Premium Transmission,

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what is the formula to convert from KVAr to current?

1 Answers   Halcrow International Partnership,

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why a single phase motor of same rating takes more amps than the three phase motor? as single phase motor at 230v takes 5amp per HP while 3 p motor takes 2.5amp per hp at 230v.

1 Answers  

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1. Why transfomer reting in KVA and Motor in HP

11 Answers   AirIndia, Jindal, Mind Tree,

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