In all the generators, the excitation supply is DC. What is the significance of DC excitation? What will happen if AC supply is given as excitation supply?

2 Answers  

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Is it possible to protect 3phase overload and earth fault of the 3phase system using two CT's.

0 Answers  

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In case of 3Phase Supply, Voltage R-Earth/Neutral - 220 Y-Earth/Neutral - 220 Z-Earth/Neutral - 220 Total is -> 660Volts Then Why it is said that 3Phase supply is 440

6 Answers   Hindustan Unilever Limited,

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what is the capacitance of a single conductor

6 Answers   Bhel,

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My question is whether bellow formula is correct to find bus size for 46kA for 0.5 second & what is RT in bellow formula. formula to calculate the size of busbar to withstand the thermal stresses due to currents with duration of 0.2 sec to 5 sec. Sp = RT( I x I x t) / K Where Sp – is the cross sectional area of bus bar in millimeters. I -    is the value of AC fault current. t -    is the operating time of disconnecting device in seconds. K –  is the factor depending on the material of the conductor, insulation and initial and final temperature. Value of ‘k’ for copper is 143.

0 Answers   Premier,

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What is the difference between ground and neutral ?

2 Answers   TCS,

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What type of pipe material G.I or M.S is used for sprinkler system?

2 Answers  

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what is the meaning of electrical maintenance?

3 Answers   GE Healthcare, MAHINDRA,

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why fault current time duration is calculated for 1 minutes?

1 Answers   Rockfort Engineering,

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How to calculate the average power factor in 3 phase unbalanced system

5 Answers   Bhel, MacLellan,

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now-a-days which devices are using for converter

7 Answers  

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how to select earthing conductor size of amy motor/panel etc.

1 Answers   Sony, VBB,

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