How to calculate the total number cells required for a particular KVA UPS system?

1 Answers  

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why the transformer connected like STAR- STAR, DELTA- DELTA, STAR- DELTA, DELTA-STAR ...? why these connections ,,, explain the advantages these connections?

0 Answers  

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How to design inductive load for 3 phase 440v and maximum 5 amps for star or delta? Can we use a 15kW, 1450rpm motor for 15kW, 960rpm apllication?If yes.how......n.if thesame motor used what`s it`s sideeefect.

0 Answers  

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diff between grounding & earthing

8 Answers   BARC, Mobiserv, NTPC, Tata Steel Limited,

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How to calculate the motor winding resistance ?

21 Answers   Forbis, L&T, OEGI, VTI,

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What is the most important precaution in any experiment with d.c. Shunt motor?

0 Answers  

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our scope called one core cable for distribution system so we like to use 4 core cable with one equipment grounding conductor so what kind of technical reasons i can say that the 4core is better then 1 core,

2 Answers   Elite Construction,

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In constant power region of 3-phase IM torque-speed characteristics, if frequency increases voltage A does not alter B decreases C increases D none of above

1 Answers  

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What will happen if power transformer designed for 50 Hz is connected to 500 Hz of the same voltage , and vice versa ?

1 Answers  

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what is principle in relay testing kit?

3 Answers  

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What is the meaning of Insulation H for transformers????

0 Answers  

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why can the rotor of 3 phase slip ring induction motor not be a 2 phase rotor?

0 Answers  

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