Answer / sharath

in slip-ring motors brushes are required to short the rotor
winding with the help of resistance where as in squirrel
cage rotor winding are internally shorted with end-rings so
they dnot required brushes.

Answer / gaurav tripathi

because three phase a.c. supply is given to stator "NOT" on
rotor

Answer / raul

there are basically two purposes for slip rings n brushes
in slip ring rotor......firstly they r used to short ckt
the rotor windings while in the squirel cage motors the
rotors winding r in-built short ckted by d heavy end
rings..........secondly they r used for speed control of
the motor by connecting external resistors wid the help of
slip ring n associated brushes.......

Answer / mohamed idris

slip and brushes are not used in squrriel cage induction...
bec rotor windings are look like a cage... therefore
windings are short circuted by end ring.... therfore no need
to use slip and brushes in squrriel cage motor

what is real and reactive power?

2 Answers  

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1- XC and the RC time constant are both measures of the reaction of C to a change in ____? 2-The power factor is a numerical ratio with a value between 0 and 1 equal to the ______________ of the phase angle. 3-When V and I are out of phase because of reactance, the product of V times I is called ______________ power 4-For _____________ inductors, the branch currents can be added algebraically. 5- The ______________ power in watts can be calculated as I^2R 6-Calculate XL with L = 30mH and f = 1kHz ( I have Xl=2piFL 2*3.141592653*1kHz*30mH =188 ohms Please check) 7-A parallel RL circuit has the values, R = 5kohms, XL = 5kohms. A voltage source of Vt = 10Vrms is connected in parallel to R and L. Determine the total current, It delivered by the voltage source Vt. 8-A series RC circuit has R = 1Mohm and C = 1microF. How long would it take for the capacitor to fully discharge if it is initially fully charged? 9-A circuit has real power = 300W and an apparent power of 500VA. Determine the power factor and phase angle. 10-The time constant for an LR series circuit is T = 0.1s and R = 10ohms. Calculate the inductance L.

0 Answers  

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How to run a three phase motor into single phase........

0 Answers   Oil India,

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If the t/f capacity is 500KvA then what is Amps ratting of the main breaker.

5 Answers  

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What is the vector group of a transformer,how can it be found out?

0 Answers   Jindal,

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How to do stting of vl250 siemens MCCB

0 Answers   Qatar Steel,

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why battery set is required for D.G.set?

7 Answers  

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size of condotory fron voltage level

0 Answers  

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A IS TWICE AS GOOD A WORKMAN AS B AND TOGETHER THEY FINISH A PIECE OF WORK IN 14 DAYS.THE NUMBER OF DAYS TAKEN BY A ALONE TO FINISH THE WORK IS 1.11 2.21 3.28 4.42

3 Answers   Ramky,

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What is the difference between Earthing and Neutral?

13 Answers  

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Explain how Hormonics will effect the Electrical System?

5 Answers  

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my first school?

1 Answers  

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