pls,send the previous year written test questions.

0 Answers  

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in a dc motor we supply current only to the armature conductors,from where is the field winding gets excited then??

3 Answers   RRB, Siemens,

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I HAVE A INCOMING 100A MCCB TPN 25KA, CABLE LENGHT OF 80M 70MM CABLE SIZE FROM MAIN SUBBOARD TO NEW DB.BASE ON THE FAULT LEVEL SETTING OF 45KA.I WOULD LIKE TO FIND OUT 25KA ENOUGH KA. APPRECIATE IF SOMEBODY CAN ASSIST ME WITH FORMULA FOR THIS. FRM: JEFF

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hi friends can u tell me name of the sites where i can get animation of electrical machines......

1 Answers  

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what is the difference between 230v and 115v?

1 Answers   Bhushan Power Steel,

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Which type of DC generator is used for electric welding purposes and why?

1 Answers  

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what transformer we used normally and upto which kva?

0 Answers  

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A TRANSFORMER 440/400V,DELTA/STAR CONNECTED.THE NEUTRAL CONNECTED WITH GROUND CABLE THAT IS DIRECTLY CONNECTED TO THE PANEL,FROM PANEL IT IS CONNECTED EARTH PIT.IS IT RIGHT? IF IT IS RIGHT LEAKAGE CURRENT AFFECTED.SECONDATY IS PROTECTED WITH EARTH LEAKAGE RELAY.

0 Answers   Jindal,

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Why reverse power relay is used?

12 Answers  

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WHY WE NEED NEUTRAL FOR 3PH 400 OR 415 VOLTS POWER SUPPLY (4 WIRE SOURCE).

5 Answers  

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Why slip-ring and brushes are not required in squirrel cage induction motor?

4 Answers   L&T,

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electrical ques

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