difference bteween neutral grounding resistor and neutral grounding transformer??

1 Answers  

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Can you explain operating principle of Inverse Definite Minimum Time” (IDMT) relay

2 Answers  

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we hav seen in electric engine of trains only 1 wired slidng conecctn is there frm ovrhead line,howevr to complete a ckt in dc postv n negtv two conection has to b there...so where is tht negative is been connectd or where it is grounded...?

5 Answers   ABB,

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wich type of cable is selected for wiring of 20hp motor?

5 Answers   Alchemist,

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how df/dt relay operates & how it works?

1 Answers  

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Why colled 440V to 3-phase supply.

0 Answers  

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what is the full form of KVAR

6 Answers  

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what is a core company? why should we join a core company?

1 Answers  

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what happens when a dc shunt motor fed with an alternating suppy ?

1 Answers  

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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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how a.c. genarator control power factor when its conected to grid supply by incrising or decresing excitation voltage.

1 Answers  

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What should be the setting of an earth fault relay.

2 Answers   HP,

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