Answer / r g sabnis

Well, the slip rings are used in AC ( Crane duty Motors )

to add extrenal resistance to increse starting torque.

DC motors are with different construction. A commutator is
used to supply DC to armature.

Answer / dj

Actualy for better torque in induction motor we should have high resistance and low inductance but in induction motor we have coil which have high inductance so we give high resistance from rheostat to rotor. And we use slip ring because it is use for rotating device only in ac motor

State ohm’s law?

0 Answers  

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in a solar power plant,we are going to step up the voltage 350V to 33kv, and to 132kv GSS. i want to ask that if it is possible that 315v/33kv is not possible because we also use 315v/11kv. or it should be 415v/33kv? is it effects generation or losses?  the second question is-generation is depends on LV winding? or LV winding design for generation voltage?

0 Answers  

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How do we measure earth fault current in Generator Transformer(20/420kv),Station Transformer(20/11 kv) and Unit Transformers(20/11kv) for our plant system, since these don't have any Neutral earth Fault relay connected to their Neutral Earth? But for Unit Service transformers(11/.433 Kv) we have an Earth Fault Relay connected to its neutral earth.Why is such so?

1 Answers   NTPC,

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What is systematic error?

0 Answers  

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what is use of stater and choke in tube light.?

2 Answers   Aditya Birla,

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In Power cable specification what is U0/U and Um.

0 Answers  

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how percentage impedence effect on the size of the power transformer?

2 Answers   Bhel,

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WHAT IS THE FUNCTION OF PULSE TRANSFORMER IN DC DRIVE

5 Answers  

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Can u tell me the name of books of transformer testing?

6 Answers  

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How harmonic block test are conducted on relays ( Siemens,Areva ect )power transformer using omicron kit?

0 Answers   Siemens,

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how to check dc current,how to fix ammeter in dc line

5 Answers   Gold Fields,

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For what purpose and why ACBs are used

4 Answers  

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