Answer / guest

Cogging can be reduced by number of rotor slots prime to number of stator
slot and also by skewing the rotor slot

A 400 V, 50 Hz, Δ connected synchronous generator has a field reactance of 0.1 Ω and armature resistance of 0.015 Ω. At full load, the machine supplies 1200 A at 0.8 pf lagging. Under full-load conditions, the friction and windage losses are 40 KW and the core losses are 30 KW. What is the machine’s overall efficiency? Ignore any field circuit losses.

0 Answers   VECL,

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what is surge impedence loading

2 Answers   NHPC,

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What is mean by CT Saturate? how do we calculate?

5 Answers   ABC,

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Zone of protection and tripping scheme of arc protection relay.

0 Answers   KSEB, L&T, Siemens,

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What is a compensator?

0 Answers  

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Difference between HRG and NGR. Are they both the same thing

0 Answers  

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Is it possible to measure the voltage of a battery from a single terminal?

0 Answers  

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Motor,transformers,capacitor tubelight etc....

0 Answers  

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difference b/w semiconductor and dielectric

2 Answers  

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Write the current equation in series RLC circuits.

0 Answers   Agilent, Integreon, ZS Associates,

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what is the differance between ac induction motor and ac synchronous motor?

5 Answers  

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How test for Ddo vector group test condition?

0 Answers  

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