Answer / skc

A large capacitor is switching ON and OFF will change the pf with a large factor of variation. but in the case of small capacitors accuracy can be maintained by ON and OFF of many capacitors.

What will happen if i connect two 3-phase tranformers secondary supply on one bus bar that is R-Y-B-N?

2 Answers   GMR,

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what is the maximum load on for 10 kva & 25 kva transformer

8 Answers   ABB, Power Grid,

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How to know the back up time for a 5KVA UPS which is connected to 15 nos. of computers? Is there any formula for this? pls. tell me.

1 Answers   HAL,

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After fault clearing in Tr line, whether the Metering core of CT is comes to normal condition from saturation region & its works as a normal condition?

1 Answers  

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A generating system will have a total capacity of 300 MW. Find the probable forced outage when the capacity is supplied by two 150 MW units. The operating probability of all units is P=0.98 and forced outage probability rate Q =0.02 .

0 Answers   BUET, VECL,

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The efficiency of a 100kva transformer is 0.98 at full load as well as half load , for this transformer what is the Copper loss at full load ?

0 Answers  

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Why Lighting transformers are used? what will be the current if lightings connected through direct raw power?

1 Answers   BMM,

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how to calculate the size of the HT cable

0 Answers  

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What is the different types of cable & current capacity of cable

0 Answers  

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why impudance relay used for medium transmission power system? why not others?

0 Answers  

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what condition there autotransformer will fail?

2 Answers  

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when the flux enters into saturation mode then what will be the secondary voltage of the normal t/f?....high or low ? explain ...how?

1 Answers  

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