How many types of fault occur in a 3-phase power system?

2 Answers  

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how we decide wire gauge for ac or dc coil and what is the basic diff. B/w these two coil?

0 Answers  

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How can we parallel two transformer with vector gorup YNd11 and YNd1?How is connection two transformer GT?

3 Answers  

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what is stper motor.what is its uses

9 Answers   Bhel, HCL,

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Why carbon brushes are used in motors?

6 Answers   BARC,

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Hi, I've just got into my electrical engineering course and I need some help with a question of mine here. During a site visit, we were shown a main LT panel which has switchgears, ammeters and different kinds of relays and the distribution network from that panel. In the main LT panel I've noted down the current readings as Ir - 163A, Iy - 150A and Ib - 147A. The Line to Line voltage is 415 V at 50 Hz and Line to Neutral voltage is 230V at 50 Hz. From the above details, how would I calculate the kVA rating of transformer? The primary side voltage of the transformer is 11 kV and the secondary side voltage is 415V and the frequency is 50 Hz.

2 Answers  

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Differenciate between circuit wiring and sub main wiring with illustrations

0 Answers   MU,

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Will an earth leakage trip be activated if the component or wiring is faulty on low voltage equipment.Example An electrical Cat Scarer placed in the garden and water gets into the wiring.

0 Answers  

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Why corona leads to production of Ozone and glow of the color VOILET?

0 Answers  

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What are the effects of adding a zero to a system?

0 Answers  

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tell 2 reasons for why only copper is used in domestic wires& only alluminium in transmission lines ?

10 Answers   ABB,

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how does it help for selection of a transformer.

1 Answers   Reddy Labs,

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