what you mean swtchgear(electrical)

1 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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in gen traf what is ONAN , ONAF , OFAF and DYN

3 Answers  

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how to understand the controling circuits example star- delta-starter controling daigram please let me know

3 Answers   GMR,

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PRV (Pressure relief valve) Trip with oil splash outside power transformers

1 Answers   Khan,

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What is majour reason of Electrical Arcing ?

9 Answers   ABB,

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what is the ckt diagram of a tubelight and is it the simplest ckt of electrical engineering and also the component?

0 Answers  

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what is meant by motor startup supervision & motor load jam protection ?

0 Answers   ABB,

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what the is the distance between 110kv termination point and the ground. how to calculate

1 Answers  

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what is the use of piston rings in the engine used for a generator...........

0 Answers  

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as per BIS supply voltage in India is ......

9 Answers  

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Saving in copper achieved by converting a 2 winding transformer in to an auto transformer is determined by A voltage transformation ratio B load on secondary C quality of core material D size of transformer core

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