Answer / madhusudhan

DGSETRUNNIGRPM

Answer / md.nokimuzzaman

Mr.Madhusudhan,
Please explain your answer.

Answer / k.prakashchandra

AVR maintains the set voltage , it does not regulate power.

A commercial Building is designed with 14th floor levels with indoor substation of three phase transformer with rated capacity of 1000 Kva.The transformer delivered 65% of its rated capacity at 0.67 power factor lagging.Because of low power factor, the power customer was penalized and certain cost was charged accordingly based on every point percentage lower than 85%.This situation may repeatedly happen on the succeding energy bills of power customer.The power customer is desired to improve its historical power factor of 0.67 lagging and no further penalty be impose by the local power company on the next bill. Q: Identify the appropriate solution you want to offer to Client?.Justify SCIENTIFICALLY and MATHEMATICALLY the principles behind the solution.

0 Answers  

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how on load transformer is chnage the Tapping ?

2 Answers  

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29 Which of the following breaking method save energy? A regenerative breaking B plugging C dynamic breaking D none of above

1 Answers  

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What is meant by pitch of a synchronous machine.??

1 Answers   Kirloskar,

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can any one provide me a connection wiring diagram for a DG set control panel along with BOM?

0 Answers   Omaxe,

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Explain the purpose of inductor in an electric circuit?

0 Answers  

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how to reduce disel generator voltage from 410-60 hz to 380v-60hz

1 Answers  

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Can we use Ccapacitive voltage transformer directly for metering purpose?

0 Answers  

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1.stranded resistance values of motors? 2.how to calculate the resistance values of single phase and 3phase motors?

2 Answers   Bell, L&T,

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why u want to work in sail/ntpc as u r already in an it company where life is good, good environment no much tensions etc?

6 Answers   Sail,

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Dir sir we have 750 kva Caterpillar dg set we are fas on different problem we start dg set ofter 1 mint apply load around 500a dg was run one or 3 mint after 3 mints dg was shutdown automatic how to face tis problem

3 Answers  

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When we use air circuit breaker, it has O/L protection ,time delay SC protection, Instataneous SC protection & ground fault protection. They all have some setting range. But what is the suitable/allowable setting for the above protection which will be safe for the equipment? For example-O/L protection setting have a range of (0.4,0.45,0.5,0.55,0.6,0.65,0.7,0.8,0.9,1.0)xIn Time delay SC protection have a range of (1.25,1.5,2,3,4,6,8,10,12)xIn Time delay setting is 0.02,0.1,0.2,0.3,0.4 Instataneous setting is fixed to 20xIn Gound fault setting is given 100A,300A,600A,900A,1200A This setting are for 2500A ACB. So what will be the basic allowable setting for the above protection? is there any formulae to calculate this<

0 Answers   Lupin,

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