How to know the back up time for a 5KVA UPS which is connected to 15 nos. of computers? Is there any formula for this? pls. tell me.

1 Answers   S V Sugar,

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What is the different between conventional MCC and intelligent MCC? Common controller or controller for each bucket

0 Answers  

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what is boucholz relay and the significance of it in to the transformer?

2 Answers  

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What are the types of piano switches?

0 Answers  

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what are the type of motors

3 Answers  

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how single phase preventer works ?

0 Answers  

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why are the maintaine power factor and how can this control and this is how work.

0 Answers   Mukand,

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what is the use of conservator in a transformer?

6 Answers   L&T, TATA, Tata Motors,

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How can get electrical c licence.Now i am working in spining Mill , transformer capacity 2750kva. Sanction demand 2250kva. Please advise me . My contact no 09944226823

5 Answers   Pace Power Systems, VRVS, VSJ Industry,

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Why Two Transformers aside shoud be supperated by concreted wall?

5 Answers  

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an amazing situation was faced when an alive distribution panel with 415 volts and carrying almost 200Amps has become short and this metal cubical showing 220 volts against neutral and earth. to redress any confusion i checked the panel with help of single 200watts test lamp which also glowing with max.intensity b/w neutral & metal body of DB. amazing situation is that i hold the DB firmly more than once with necked foot means without insulated shoes but not received any electrical shock. whereas our all running gen sets neutral points also proper grounded and this short DB was completely earthed , this is beyond my understanding . any body explain how is it possible . our running gen set neutral also grounded firmly

1 Answers  

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what is the difference between synchronous & asynchronous generators

1 Answers   Emco,

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