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Between Star-Delta & Star-Star Power transformer which one
is efficent for Earth Fault?
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Answer / daher
star/star because in the case of line to earth faults the
zero curret IO in delta connection transformer has no path
to leave the close loop of three phases transformer
| Is This Answer Correct ? | 17 Yes | 8 No |
Answer / nidhi
star delta .
because in star star connection solidal grounding should be
provided to ground third harmonics. in star delta whenever
afault will occur then it will circulate only in this delta
not go to the output
| Is This Answer Correct ? | 12 Yes | 5 No |
Answer / sunil guru
Star - Star bcz.. it has a point at center which can be
used as a neutral or can be grounded,
but in case of star-delta there is no path for ground
return current during short circuit..an the circulating
current will flow inward itself and can damage the winding..
for any disagreement mail me at parmar20072008@yahoo.com
| Is This Answer Correct ? | 2 Yes | 0 No |
Answer / awais
Star star because for earth fault return path is required to complete the circuit so neutral grounded star connection is ideal for such type of fault detection..
| Is This Answer Correct ? | 1 Yes | 0 No |
Answer / daher
star/star in case of line to ground short circuit in star -
delta transformer their is no path to I0 short circuit
current and it will turn inside the closed circuit of delta
connection
| Is This Answer Correct ? | 1 Yes | 4 No |
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