Answer / gurusaran

Double delta connection is used to achieve reduced voltage
during start up of a motor by changing a delta connected
winding from parallel groups to series groups.This is termed
as "double delta connection" because the delta winding is
connected in series during start up and the same is connected
in parallel during running condition with the help of a part
winding starter.Since all winding's are connected in starting
as well as running conditions the amount of heat generated is
not so severe.

why we use lamination or layer by layer cor used?

4 Answers  

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what happen if the secondry winding of the transformer is having less no of turns compare to the primery winding.

2 Answers  

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When generator connected, the circuit ELCB exploded. What is the reson?

3 Answers  

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why electric shock due to dc is dangerous than that of ac

8 Answers  

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What type of pipe material G.I or M.S is used for sprinkler system?

2 Answers  

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what is power factor ?

3 Answers  

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what is the first step of dg shycroning ?

2 Answers   ABB,

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What is the full form of GSL wire

8 Answers   Bhel, GSL,

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kindly send me 11KV MV motor differential protection procedure by primary injection method.

0 Answers  

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describe the constructional features of an auto transformer and its principle operation

0 Answers  

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What do you mean by pf of a generator? Power factor purely depends on the load (wether inductive, reactive or unity) then what does the pf mentioned on the generator nameplate means?

3 Answers  

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how to changeover ups in this power failur time?

0 Answers   Essar,

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