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Electronic welding machine separate earthing provided or not?

In electrical locomotive engines, the DC series motors is being used as traction motor. But in new engines like in WAP7 & WAG9 the 3-phase squiral cage induction motors has replaced them. So can someone tell me the advantages of induction motor over dc seris motor in engines points of view....???

0 Answers   RRB,

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what is alternator?

4 Answers  

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Define the overload capacity of the motor.

3 Answers   Alstom, Maynilad,

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The loads are connected with phase and ground then why current flow as the loads ?

0 Answers  

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what is first pole to clear factor

1 Answers  

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how to check a three phase induction motor by multimeter & megger?

2 Answers  

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HOW DO I CALCULATE THE SETTINGS FOR THE DIFFERENTIAL PROTECTION OF A 12kV/6.6kV, 6MVA,DYN11 XMER WITH PRIMARY SIDE CTR 400/1 AND SEC SIDE CTR 600/1?

0 Answers   Adhunik,

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Define Current Transformer? Working & TYpe's Of C.T.

4 Answers  

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HOW TO CALLICULATE RESITENCE,REACTANCE AND IMPEDENCE VOLTGE OF TRANSFORMER 13.33 KVA 144/240 VOLTS 93/56 A WITH FORMULA

0 Answers   ISRO,

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Difference between field rheostat and armature rheostat.

0 Answers  

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What is farmula to calculate Diesel cunsumption as par KVA.

3 Answers   HCL,

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How does zener phenomenon differ from avalanche breakdown?

0 Answers  

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