Answer / k.prakashchandra

DOL starter is used for small motors having thin winding
wire of considerable resistance .Hence starting current will
not be very high.

Answer / guest

dol starter in used porpos in to limit the starting current

what happens if the phase sequence of parrlel connected sys will changed & phase displacement

1 Answers  

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Can a generator rated 400 V, 60 Hz be used in a 50 Hz System? Yes or No ? Why ?

1 Answers   VECL,

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why it is necessary to maintain frequency constant in a power grid ?

1 Answers   NTPC,

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Is a contactor (or master relay) required between incoming lines and a VFD? The question goes to safety. If a contactor were used before the VFD and an e-stop engaged then the motor will coast to a stop (i.e. VFD loses power) instead of stopping much faster if the VFD braking fucntion were used. It would make more sense to keep power on the VFD.

0 Answers   Pride Hotels,

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How out of step protection relay works?

0 Answers   APL,

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What are the advantages of the three-phase motor over single phase motor?

0 Answers  

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Why we called L-G fault as line to ground fault why ground? suppose if a line falls on building roof then can we called these fault as line to roof fault? please explain why ground term is used here?

3 Answers   Bhel,

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What are IP protections used for electrical panels, JB, equipments installed in explosive zones like Petrochemicals, Oil & gas

1 Answers  

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diameter of cable and core is doubled then the value of capacitance is

0 Answers  

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Explain the method to keep noises low in a control system?

0 Answers   HPCL,

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WHY THE RATINGS OF TRASNFORMER IS IN KVA?

5 Answers   Jindal,

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Technical specification of a wind farm

1 Answers  

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