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.

On a 3 winding transformer YNynd11, how do you apply REF protection to the Delta tertiary winding that is supplying auxiliaries to a substation?

0 Answers   Kwekwe Polytechnic,

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does not the circulating current in a transformer affect the flux distribution in the transformer core

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How can you measure battery AH?

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how works inductive &capacitive sensors?

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dear all i am kumara now current working in electrical designing of control and relay panel i want learn some substaion design then any book are available. pls mention name and authour

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On a 6 KVA UPS we have to provide a DC MCB for Battery bank of 16 nos (12 V 42 AH). What Shall be the current rating of DC MCB ?

0 Answers   TNEB Tamil Nadu Electricity Board,

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Why dont we get shock while testing for voltage with a line tester? How the bulb inside the tester glows while testing with tester coz we are totaly isolated from earth or we are not giving close path for the current to flow?

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What is LMU and LMDU. in PLCC communication of 132 kv transmission line. is it possible to use only one LMU with out LMDU ?

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In case of legging current of 20°, pf is .94 and leading of 20°,pf is .94 , in mathematicaly both are same but in realy how it is differ ?

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what will happen ac motor give to dc supply

9 Answers   Areva, College School Exams Tests,

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Why PS class CT is always preferred for Differential protection?

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What is earth fault?

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