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DRAW THE DIFFERENCE BETWEEN GROUND AND NEUTRAL IN BOTH SINGLE PHASE AND THREE PHASE?
As we know that during saturation test of CT from secondary side, the current in secondary shoots up after core saturation. How core saturation effects the secondary current?
Explain types soft starters?
Which theory is used in the analysis of salient pole rotor synchronous machines? Who is credited for this developement? Could the same theory be used for cylindrical rotor synchronous machines?
1) How to calculate battery backup for ups as well as solar with complete formula elaborately......
In electrical locomotive engines, the DC series motors is being used as traction motor. But in new engines like in WAP7 & WAG9 the 3-phase squiral cage induction motors has replaced them. So can someone tell me the advantages of induction motor over dc seris motor in engines points of view....???
Why the Transformer connection is changing in different transformer?(Like Star & Delta,Delta & Delta,Star & Star,Delta Star) From that connection where it is used?
What is bushing?
Differentiate between Low and High impedance Protection
Why cpaciter opposes sudden changes in voltage?and how?
1. When do you use a VFD motor? 2. If the ceiling fan is on slow speed, does it consume less electricity? 3. If we want the fan to consume less electricity at low speed, what do we have to do? 4. What does “battery of 180 AMP HOUR” mean to you? 5. What does “battery of 180 AMP HOUR” mean to you? 6. If you don’t have coal, salt and copper, then how would you earth your connection temporarily at a camp site.?
6 Answers Asian Power, Bhel, Focus, Focus Energy, L&T,
why generator and t/f ratings given in kva & motor rating is in KW?
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