What the reson for frequant instantaneous ground over current fault in our sync. Generator... 15 triping in 24 hr...

1 Answers   HCPL, Jhunjhunwala Vanaspati Jhoola, Regen Powertech,

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800A 22KV TP OCB. explain

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what is the different between RCCB & ELCB

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can I improve the furnace power factor (10 mva transformer) by adding a capacitor bank before the transformer.Does system power factor vary a lot with the furnace PF?

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1) why a dg set shows variation of power factor and load when synchronised with other dgs? 2)Why the load sharing is not become equal in all dgs?. 3)When a dg set will not run on auto start?

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How would you supply power to a village which is very far from a sub-station and has only a 11kV line running near by?

3 Answers  

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How to create a SCADA diagram on PC? I run the DG everyday but i dont know how that animated single line diagram is created.Please answer.

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what will happen if we will not use commutater means if we will give dc to the windings in dc motor

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Why a motor blower cobination draw more current at winter than summer?

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using n1*n2 which type transformer is made; where n1 is primary turn and n2 is secondery turn

1 Answers   JSW,

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why we used.c source in the field of the alternator , why not a.c source.

1 Answers  

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Hi Suppose we have a wye/wye transformer which is grounded at both sides,in this situation, do we have ay ground transformer? in other words, ground transformer can do any thing more (while we have nuetral wire in both sides)? As the last question, what about 3rd harmonic? we have two choices: first using wye/delta transformer + ground transformer and second using wye/wye earthed connection.in the former choice, we dont have 3rd harmoonic at the secondary side but what about Yn/yn conection? do we suffer from 3rd harmonic in the Yn/yn connection?

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