Answer / surendar

1)same polarity
2)must be same impedance voltage
3)transform ratio must be same
i.e V1/V2=I2/I1=N1/N2=1/K
4)same vector group & phase squence must be same
5)same make

How to calculate unit consumption on the basis of load. kWH=kwXhrs.is it correct? kw is motor load.What is unit consumption at 100% load, 50% load & on no load.

6 Answers   GIL,

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We have a 33/11kv switchyard having 12.5 MVA power transformer. We export & import power through this transformer. When we export power, the PF will be depend on GRID PF & when we import power the PF will be depend on our load PF. but the problem is that,when neither we export nor import but our 33KV vCB is in close position,our meter read the power factor 0.14 to 0.25 at that moment. So how can be we improve the power factor at that moment.

3 Answers  

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How to synchronization will be done between two DGs ?

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back emf of motor at the time of starting ?

2 Answers  

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BRIEFLY EXPLAIN THE STORAGE CLASSES AND THEIR TYPES IN C

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How will you justify IR value and Charging voltage of any motor,transformer and Cables.......???? . . . . . . . . Plz tell me any body Baljeet Singh, engineer_89@refiff.com

0 Answers  

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what is the exact direction of current? as we know current travels from higher potential to lower potential,so if we take battery +ve to -ve implies current direction is from positive terminal to negative terminal.,whereas electrons flow from negative to positive as they are attracted by positive ions.current will be the plow of charge but not flow of positive ions.please clarify my doubt friends.

2 Answers  

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What are differences between Voltage, EMF & Potential difference ?

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if u have to run a 300kw moter then what is ur choice HT or LT switchgear & explain why?

3 Answers   Aditya Birla,

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what can i do, if i want to carrier in design as i am electrical engg?

3 Answers  

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why the undervoltage relay's interlock is used in earthswitch closing operation of the 400kV line scheme?

2 Answers  

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Why it need to form a capcitor when it not been in use from three or two year. Plz describe it technically.

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