Why the transformers are rated in KVA ? in new view

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why square root 2 is multiplied with line voltage in selection of LA ie 11/sqrtroot3=6.35 kv and it is multiplied with sqrt2 ie 6.35 KV*sqrt2=8.9 kv we will select 9kv.my question is why we are multiplying with sqrt 2?

1 Answers   KSPL,

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3 pahase 750kva Running 2 DG sets in 35 mints.525ampers. and 616 kw how much fuel consumption in Generator.what is the formula.

1 Answers   Delite Systems Engineering,

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I have a 25kVA three phase transformer on our property. Will this transformer be large enough to run a large home with swimming pool, spa, 2 off full size reverse cycle air conditioners to service a 100 square house (10,000 square feet or 930 square metres)and the general power consumption of this house without upgrading to a 63kVA transformer.

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How to calculate per unit impedance of transformer?

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What are the types of control system?

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In CDG type IDMTL realy O/L , E/F, O/C which are used for out going feedrs,on R-phase o/c element, Y-phase , e/f elecment and on b -phase o/c element will be connected . Why the earth fault on center phase only, why not on other two phases?

2 Answers  

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What is mean by powerfactor. What is the difference between leading and lagging power factor?

2 Answers   HCL,

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What is the real use of reactive power in a electrical system other than loss (inductive &capacitive).I want to know its real physical significance.

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WHAT IS INERTIA,AND WAT IS TORQUE.

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when we are going to higher voltage level in substations why we are using Sf6 circuit breakers instead of Vacuum circuit breakers.

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What is required of exietation to the alternater.

4 Answers  

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