Answer / a.p.nanjappa

THIS IS ONE OF THE MANUFACTURER TEST OF VECTOR GROUP.
IN THIS TEST , THE HV RPh or Uph is connected to low voltage
rPh. /uPh. then 400v 3ph is applied. various voltage are
measured. (RS,ST,TR, R-N,S-N.T-N, r-s,s-t,t-r, r-N,s-n,t-n.

then, draw the graph,
refer to electrical hand book-transformer, any text book
also,manufacturer test report

in power generator normaly voltagr betwween esth to neutral is 0 but my work place generator show the volatge is 60v any body know why? thanks

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During the transients in alternator,the mechanical power input remains almost constant while the electrical power output changes significantly.Why?

1 Answers  

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how we select ac fuse rating of an power inverter???

0 Answers   Simco,

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What is difference between incomer & outgoing type Vaccum Circuit Breaker?

2 Answers   VBG,

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A 30KW motor running at 1450 rpm draws 56A, how would you determine if this is correct or not?

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why we use 25 kv in railway .not 11kv, or 33 kv

2 Answers   ISRO,

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What is the Derating factor of power cables when exposed to direct sunlight in (both PVC & XLPE).

1 Answers  

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What are the advantages and disadvantages of oil filled transformers?

2 Answers   Mercantile Marine Department, Studio College,

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Can anyone tell me some hints about what type of questions are asked by the interviewer by an Electronics engineer when company is installing an IPP and wants a team of engineers?

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what you mean by current? what you mean by voltage? what is difference between star and delta connection in motor side?

2 Answers   Adani,

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why power factor occur only inductive load not in resistive ?

8 Answers  

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I find that underground strip-armoiured,4core,LT PVC cables in an earthed power distribution sytem are occasionly found in charred condition-with no trace of it except ash. Is this because of no proper earth connection/continuity (giving rising to high armour resistance)in the joint enroute or because of insufficient capability (again due to high armour resistance)of cable-armour to carry fault current or due to neglected /unprotected overloading of the cable or due to high armour currents caused by power thefts where only phase(s) are unauthorisely tapped & at the point of poer consumption earth terminal is established by burring underground a not so good earthing rod (or using an underground water pipe for the purpose)

1 Answers  

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