Answer / sharath kumar

because at time of synchronization the speed of the incoming
machine comes down since the incoming machine tries to share
the load

What is the harm if we install primary side 11 KV VCB at a distance of one Km from the 11/3.3KV 12.5 MVA transformer through 11 KV cable.

4 Answers  

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This is about the recent problem that we have faced in our project site. We have 6/7.5 MVA. 66/11kV three phase star - star power transformer. The neutral was solidly connected to the earthing mat. But because of high resistance of earthing mat (130 ohm on LV and 180 ohm on HV), one day LV side neutral earthing conductor melted and we had a huge damage. Can any one plz tell me what might happen when we connect power transformer neutral to the earthing mat which has high resistance (>100 ohm ) ?????

2 Answers  

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wat will be the pressure maintained inside the transformer?

2 Answers  

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What are the limitations of Kirchoff's laws?

0 Answers  

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What are the advantages of thermal power plant?

0 Answers  

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Name one of major transformer company in KSA ?

0 Answers  

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what happens if sf6ckt breaker gas pressure is high or low about the actual rating of gas pressure(5kg/cm2)

2 Answers  

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how to make a solar panel? why solar panel cell connected to serious?

1 Answers  

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We have 11kV/110V three phase indoor potential transformer in 66/11kV Sub-station, where the failure of PT is frequently happening and the rating of the PT is 0.2 class accuracy, with primary star and seconday (two cores) star connected. Some experts has suggested to not to connect the PT Primary neutral to the ground because when transformer neutal NCT connection is loose; the faulty current will flow through the PT primary neutral, resulting into failure of PT. My question is: Is it necessary to remove the primary neutral connection of the PT from ground? if not, what would be the reason for failure of PT. Please guide me.

2 Answers   KPTCL,

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Is it required to use 2 nos of body earthings to any machine though if we use TP with E supply is provided to Machine?

2 Answers   HAL,

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why steady state stability limit is greater than transient stability limit ? How it can be explained ?

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I need to connect a synchronous generator to the grid using automatic synchronization and two circuit breakers (one for synchronization, one for end connection to the grid), how to determinate the required diameter of the cables?

0 Answers  

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