how to calculate single phase motor efficiency ?

0 Answers   Bhel,

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Does the Impedance of the source affects the THD

1 Answers  

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when a hand crancked meggar is used to check most three phase induction motors, how many tests r rquired? Why?

1 Answers  

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why firewall is build up between two transformer (220/11kv,50MVA)?what should be the firewall height?what is the clearance between firewall and transformer?

2 Answers   Siemens, Tous Stadt,

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What is formula calculation size cable wire ?

0 Answers  

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we done magnetic balance test for 33KV /440V transformer in our company , but the ratio out is confusing us Voltage applied in RY = 440 , at RB = 320 and YB = 60 RY 440 = ( RB + YB ) 380 only Please let me know what type of problem is it.

2 Answers  

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What is mean by spike arrester(Voltage Operated)

0 Answers   Siemens,

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a)In a 3-phase 4-wire circuit, a circuit breaker is selected to protect the circuit whose highest fault level is 6.6 MVA. Determine the required minimum breaking capacity in kA. (Note: Covert 3-phase power in terms of kA to find answer.) b)Using the below, determine the required minimum making capacity in kA as a “peak value”. Rate breaking capacity (Icn) ka: Icn<= 1.5 Factor = 1.41 1.5

0 Answers  

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What is the basic difference among IPS,UPS,EPS?

2 Answers   ABB, Navana,

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What is mean by STUB protection?

0 Answers  

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sail kaott diploma ece ke interviw me qus.kis parkar ke aate hai aur G.S me kya puchate hai kya sameedyaan me kis parkar ke qu.puchate hai

0 Answers   Sail,

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why in scott connection of transformers, main transformer is tapped at 50% and teaser transformer at 86.6%?

5 Answers   Bhel, Bosch, College School Exams Tests, Wipro,

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