Why earthing is required, and what effect in earthing result is more than 5 ohm and less than 5 or equal to 0 ohm

2 Answers  

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What is the theoretical reason for the size of a zig zag grounding transformer to be 1.732 times less than that of a wye-delta grounding transformer used for the same application?

0 Answers  

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A 200 KVA UPS's load current is 70 A. We want to provide a Generator back up. What capacity of DG required for this ?

1 Answers   Reliance,

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Importance of fault current in power transformers and how to monitor the same? How is it different from winding temperature?

0 Answers   Impulse,

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At the starting of dc motor and syn.motor and induction motor high current flowing through the winding. Due to this the windings burnt out. To avoid this different types of starters are used. But incase of transformer what Will be used (At starting no emf is induced in the primary winding)?

0 Answers  

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What is the difference between diode and a transistor in terms of the direction of current flow?

0 Answers  

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if the motor rated speed is 950rpm. how to change the above rated speed? is it possible?

0 Answers  

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What are the basic properties of signal flow graph?

0 Answers  

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11 kg trivevter meter has rating of -/5amps. And pt ratio11000/110v and is connected with 11kv ct/pt unit of cr ratio 75/5amps. And pt ratio of 11000/110v while checking accuracy of meter with HT Accuchek meter what value of PT ratio and CT ratio to be filled in Accuchek meter

0 Answers  

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what is mean by derating factor?

4 Answers   Essar,

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what is cut out fuse?

1 Answers  

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what is difference between the buscoupler and bus raiser?

1 Answers   Synechron,

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