please explain working of revers power relay

4 Answers   CESC, DCM,

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what is the formula for efficiency of francis turbine and generator for hydropower? what is best way to select francis turbine and generator?

0 Answers   HAL,

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Can u tell me design of switch yard

0 Answers   NTPC,

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what is star delta starter? how it works? give its control and power diagram.

0 Answers   Bhel, Point to Point Solution, Star Wire,

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why air handling unit interloking in case of fire

3 Answers  

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why an ac solenoid valve attract the plunger eventhough we interchanges the terminal?will the ploes changes?

1 Answers  

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how do you test the capacitor bank ?

12 Answers   Essar,

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what is the relation between knowing of the distance between power transformer and the capacitor feeder in case of parallel operation

0 Answers  

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what are the safety measures of induction motor?

0 Answers  

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in catridge heeter  watts =110, 260 v ,  i checked in multimeeter meeter shows 50 ohms but oms law r=v square /w  260*260=67600, and 67600/110=614.5 ohms  how to caluclate exact ohms in heetre s 

2 Answers  

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Is it possible to use AC supply insted of DC supply in trip coil operation? if not, why?

5 Answers   HAL,

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Do you know how to joint the H.T and L.T Cables?

23 Answers   KESC, MGVCL, Nokia, Oil Country Tubular, Power Control, SAGT, Siemens, Simco, Vivek Engineers,

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