What is diversity factor.

2 Answers   Cadbury,

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why in an electrical lab a bulb connected to supply goes off slowly when the main supply is switched off?

2 Answers  

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Which type of DC generator is used for electric welding purposes and why?

1 Answers  

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what is cogging and crawling

20 Answers   ABB, Ashok Leyland, Bharat Bijlee, BMRCL, MN Dastur, Siemens,

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Write the Name of 7 Birsrestho of Bangladesh with their designation

1 Answers  

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difference between shunt coil and tripping coil

8 Answers   GE,

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What is the minimum load that you can keep in a 3 Phase 40 KVA Diesel Generator? Is it neccessary to load all the 3 phases? Can a phase be left without load?

2 Answers   DRDO,

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What are merits & De-merits of State-Space Method? What is series programming, parallel programming, general programming & direct programming ? And, difference between these programmings Techniques ?

0 Answers  

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In UPS, battery connections if parallel connection given, what will happen?

2 Answers  

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What we change frequency from transformer. yes or no

3 Answers   Intas,

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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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I HAVE A 1 MVA TRANSFORMER, I WANT TO KNOW THE FAULT LEVEL OF THE SYSTEM ( WHAT IS FAULT LEVEL PLEASE EXPLAIN WITH EXAMPLE)

5 Answers   Alstom,

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