Can a 150 kva 3 phase,440v/230v delta-wye connection stepdown transformer can be used in reverse as a step up tranformer ?

3 Answers   Meralco,

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Dear Friends, I have a 500KVA transformer supplying whole factory having 3 phase and single phase mixed loads. Power room has ammeters connected via CTs for individual phase. Now I know that readings shown on meter for each phase say R,Y and B are line currents. But when I want to know the total on transformer do I need to add the currents of all three phases readings shown on meter or value for anyone phase will give me the correct power load on transformer for that point of time. 2. If ammeter shows unbalanced readings for R,Y, B phases say 150, 250 and 300 respectively so can I assume that 150A i.e average of 3 will be the 3phase load currents and remaining will be 1phase currents. Please clarify my doubt.

4 Answers  

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what could be the reason of a burnt current transformer in an electrical panel

1 Answers   ERWAT,

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3 Answers   CS,

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how we are measuring the winding temperature of the transformer?

11 Answers  

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examples of resistive inductive and capacitive load

1 Answers  

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when we supply in primary side of transformer then the supply goes in secondary side?how it works?

4 Answers  

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what is skin effect and why is it absent in DC systems

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Why double earthing is required ?

1 Answers  

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working principle of current sensing relay? how its work?

1 Answers  

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if any body have question paper of railway (section engineering),then plz send me .i will thank of him/her.

0 Answers  

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