Answer / k.prakashchandra

Slip ring motors are also called rotor wound motors and are
of high capacity..With the help of slip rings, star
connected variable resistances are connected in series with
star connected rotor windings to reduce the starting
current and increase the staring torque by improving pf.The
resistances can also control the speed, sacrificing efficiency.

explain the details about vaccum circut breaker and advantages?

4 Answers   CPCL, Unisol,

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depletion layer will form beforre biase or after bias ?

2 Answers  

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A 50Hz,4-pole,3-phase,star-connected synchronous motor has a synchronous reactance of 12ohmsper phase and negligible armature resistances.the excitation is such as to give an open-circuit voltage of 13.2kilovolt.the motor is connected to 115kilovolt, 50hertz supplying. what maximum load can be the motor torque,line current and power factor?

0 Answers  

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what is the difference between earthed system and unearthed system.. where do we use unearthed system because in electrical catalogues always cable for earthed and unearthed system is given..pls elaborate

3 Answers  

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what happens if DC earthing and AC earthings are shorted?

1 Answers  

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what happens when current(ac or dc)flowing through a boucket of water?please describe it.

3 Answers  

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what is formula in determining the size of Circuit Breaker for transformer with the following specifications. 7 units of 1600 volts (primary) and 400 volts (secondary). Both Primary and Secondary will have a circuit breaker which is SF6. What should be the Switchgear Main Breaker Size anf the sizes of each brances Circuit Breaker for Primary.

1 Answers   ABB,

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where we use the SFU & FSU?

0 Answers   L&T,

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will three phase energy meter run without one phase

2 Answers  

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Define the "All - Day Efficiency" of a Transformer

1 Answers   Transco,

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Should power factor be low or high?

0 Answers  

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why Transformer and DG rating capacity is in KVA

4 Answers   ACC,

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