Answer / nesalinpraju

DOL is Direct on line starter, it is used upto 50 H.P Motors
star delta connects motor first in star at the time
ofstarting then in delta for running.

Answer / pswin

I have seen in books that says DOL starters are used up to 50 hp(roughly 37 kw). In my project in singapore, 19 pumps of 160 kw are all start by DOL.(May not start all in one time). It is equal to 214 hp each.

explain with diagram how to protect transformers and substations from over current with help of CT's?

0 Answers   BARC,

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Is motorized MCCB required rotatory handle

1 Answers  

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why some transformer without breather.

1 Answers   GTS,

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What is difference between isolator and circuit breaker?

0 Answers  

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how nautral is provided for return path is 3 phase induction motor

0 Answers   SNGPL,

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What will be the voltage regulation of a full load and 0.80 power factor lagging load transformer when a two winding single phase transformer has a voltage regulation of 4.5% at full load and unity power factor?

0 Answers   HPCL,

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in a distribution board,if we have a load and we have selected a cable after making all calcs (Deratings and V.D , ect...) the cable we have selected was 10mm.sq. now, shall the internal cable inside the switchboard should be 10 mm.sq Like the external or it can be Less???? if somebody have an specs or information he can help D:

1 Answers  

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Can I parallel 1 MVA generator with 1kVA Generator? if V, F, Ph Seq and Ph angles are same

2 Answers  

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Does the hysteresis loss is due to retentivity property of the material? or it is due to reluctance property?

2 Answers  

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What products have you designed which have entered high volume production?

0 Answers   Intel,

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what is difference between c-power & u-power air circuit breaker?

2 Answers   Areva, IIT, Marine Electricals,

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what is buscoupler adopter panel????

5 Answers  

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