Answer / sakthivel

Er sushil saini i understand in your answer but in power
house batter is not available other wise power pack power
supply available , power pack is nothing but it is a in our
three phase power supply converted in to dc 110 volts , in
this circumstance what can i do vanthni@yahoo.com please
answer Er sushil saini

Answer / nishant2110

hey guys ....what a funny answers !!!! we have only two
extreams either open or closed. which can be serve by dc
only ..means if dc is given to trip coil,coil gets
magnetise in one direction.so that breaker gets opened.
Suppose if Ac would have been given two coil,magnetic
direction must gets changed according to frequency of
supply. So breaker starts to-n-fro motion. practically
there wont be any to-n-fro motin also because its frequency
is so high it will stay at same position. so it wont serve
the use of breaker.

why mccb is not tripping when phase & neutral terminal are interched ?

4 Answers  

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How can i calculate heat load ?

3 Answers   DSSR, NSN,

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1 unit or 1 kwh means how much kva

7 Answers   TATA,

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why frequency meter is connected in parallel in a circuit?

1 Answers   University of Engineering and Technology,

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What are the tests carried out on transformer while testing at sites?..Pls explain me in detail

2 Answers   Suzlon,

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what do you mean by PF correction. A motor is rated at 15 kw,415 volts, 0.7 pf and eff of 0.92. The powerfactor is improved to 0.98 by adding capacitors at the bus. calculate the current drawn by motor under full load condition before and after pf correction

5 Answers  

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hi frds, i m electrical engineer.can i get cdr for electrical engineer if u have then send me on my mail id its jayesh_ee88@yahoo.com.please help me frds

0 Answers  

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What is the life of MCCB

1 Answers   Siemens,

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what id a dry type transformers and its function ?

0 Answers   Wipro,

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There are two nos of 33Kv/11Kv 5MVA transformers conecting through HT cable from substation having metering at substation itself.One transformer used at a time another remains stand by.Further 11 nos of 11Kv/440V transformers are attached on it and each transformer is having its own Power factor correction panel.Now one 33/11Kv transformer at no load condition/Stand by condition is having power factor in leading side upto 0.21 and while when another tranformer at same situation have power factor in lagging 0.42. Now one thing is clear that transformer one is having 1.5 Km long 33kv cable due to that PF goes in leading side and another is having only 250 mtr length remains him lagging. Now i want to know that how i can maintain the Power factor at no load/ stand by position though both are behaving in seperate manner.

1 Answers  

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what is the use of permanent magnet generator in exciter

0 Answers   TATA,

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what is the Connected Load (kW) or Contract Demand (kVA)of mahindra nasik plant??

0 Answers  

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