what will happen if the field and armature both are made to rotate in a synchronous machine ?

4 Answers  

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given data are load current & power factor cable core size? plz any one update the calculation formula

0 Answers  

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What is the comparision (advantages / disadvantages) of 110V, 60 Hz system to 230 V, 50 Hz system.

2 Answers  

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1.what is the contact resistace of CB ? 2.radioactivity should be mesured with---------?

3 Answers   Power Grid,

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if we convert kw into Ampers,which one formula use by us,pls tell me?

9 Answers   ABB, Essar,

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how to select diiferent power transformers of same capacity on no load loss and full load loss by economical point of view.?

0 Answers  

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When the relative speed between the magnetic fields of stator and rotor does is zero under steady state operation?

0 Answers   HPCL,

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What is the starting current of a DC Motor?

2 Answers  

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What is the theoretical capacity of a channel in each of the following cases? i) Bandwidth: 20KHz SNR(dB) =40 ii) Bandwidth: 200KHz SNR(dB) =06 iii) Bandwidth: 1MHz SNR(dB) =20

0 Answers   UOG,

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who iz power minister ?? :P

1 Answers   IOCL,

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During the testing of Electrical Equipment the test cables should not touch the equipments. For that testing engineers use to cotton rope to hang the cable from measuring Equipment to testing equipment terminal. Please explain the technical reason for this practice.

1 Answers  

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Is a contactor (or master relay) required between incoming lines and a VFD? The question goes to safety. If a contactor were used before the VFD and an e-stop engaged then the motor will coast to a stop (i.e. VFD loses power) instead of stopping much faster if the VFD braking fucntion were used. It would make more sense to keep power on the VFD.

0 Answers   Pride Hotels,

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