What is mean by vector group? For what purposes we doing vector group test in transformers?

2 Answers  

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during positive and negative half cycle of ac supply what happenes in the load?

1 Answers   Siemens, Wipro,

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can three phase induction motor rotate with only 2 phases connected

22 Answers   Delta, Mannar Company, Suntron,

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What is the function of Lightning Arrester & Wavetrap in Power system ??

18 Answers   ABB, Bhel, Energy Infratech, Infosys, NTPC,

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In synchronous generators field is rotor and armature is stator.Can we take the output at the rotor in case of synchronous generator by the dc excitation on the stator?

2 Answers  

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15 suspects are rounded by the police and questioned about a bank robbery. Only one of them is guilty. The suspects are made to stand in a line and each person declares that the person next to him on his right is guilty. The rightmost person is not questioned. Which of the following possibilities are true? A. All the suspects are lying. B. The leftmost suspect is guilty. B only

2 Answers   TCS,

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Why transformer rating in KVA? describe.

5 Answers  

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Why the electron flow in reverse of current.

6 Answers  

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How many devices can be connected in one zone of FACP

0 Answers  

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In separately excited m/c,we excite the field by a dc source,what not with ac source?

1 Answers  

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what is the meaning of impedance protected in instrument cooling fan

0 Answers  

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how do i get electrical supervisor certificate in gujrat?

3 Answers   DGVCL Dakshin Gujarat Vij Company, Infosys, ONGC, Orient, Reliance,

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