why we used ZNO in Lightning arrester.

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what will happen when a electric bulb is connected between two phases.it will glow or not

18 Answers  

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Why is the neutral point of a star connected winding of a motor not grounded?

1 Answers  

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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 actual meaning between the energy conservation and energy saving ?

3 Answers  

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slipring induction motor starting time Lrs operating why lrs starting time lrs outer body didn't get shock

0 Answers   Ramco,

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Why do we require transformer with less specific weight if supply frequency is increased?

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how does damper winding produces torque in synchronous motor?

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What is the diffrence (Technical & Construction ) between CBCT & Normal CT?

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how work the differential protection relay in details?

2 Answers  

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why fuse amperes rating are specified ratings like 32amp & 64 amps?

2 Answers  

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What are the advantages and disadvantages of closed-loop control system?

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