Stator of 3-phase IM has 3 slots per pole per phase. If supply frequency is 50 Hz, calculate the speed of rotating stator flux A 1000 rpm B 500 rpm C 1500 rpm D 1440 rpm

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tan delta test of current transformer.

3 Answers   NTPC,

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why we change the direction of winding in rotor ?how we make the north and south pole?

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what is neutral plane shift?

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Why we use Delta connection in the secondary side of a High Voltage transformer?

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We have received supplies of the ordered material. payments against the supplies also released. Where ST paid 4% against form C. Meanwhile it has been observed that 25% of material supplied was defective. Please suggest whether the issuance of C form from our side would be stopped till settlement of liabilities.

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we the the value of frequency is 50 HZ in DG then why we said the value inductive rectance is zero in DG?

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what are FM 200 systems? why it is useful for electrical systems ?

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How DC earth leakage currents can be reduced ?

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why transformer rating is in kva?

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iii) A shunt motor runs at 70 rad/sec from a 460V supply and takes in an armature current of 100A. Resistors of 2.52 ohms and 1.64 ohms are connected in series with the armature and in parallel with the armature respectively. The field excitation remains direct from the 460V supply but the generated torque is halved. Determine the new running speed. Neglect brush voltage drop. The armature resistance is 0.4 ohms. [15]

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List of equipments required foe industrial repair lab.

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