In siemens S7-300 PLC, what is function and function block ? What is the difference between them ? When to use function and when to use function block ?

0 Answers  

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Why DC excitation is used for alternators? Why cant it be AC?

35 Answers   ABB, Ace Info, Alstom, Shalivahana Power,

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Refernce currents are to be generated using refernce cueernts how can this be done

0 Answers   ABC, Wipro,

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Why scr and igbt used in  ups systeam ????

1 Answers   JLL,

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If single phase voltage level is 230V than why three phase voltage level is not 660V ?, but it is only 440V.

16 Answers   BSNL, DOS, EFS, HMT, L&T, TCS, ThyssenKrupp,

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what is the min and max dc voltage for a dc system (110vdc)

1 Answers   ASD Lab,

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Why neutral grounding Transformer provided for generator?

1 Answers   Siemens,

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why ct's&pt'S out put called as burden,why compelsary short ckt the secondary of ct's while removing the burden?

0 Answers  

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how to calculate power consumption in slip ring motor at different step

0 Answers   ABB,

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what happen ,if generator will generate leading power factor?

6 Answers   CD, NTPC,

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what is the differnce between ac and dc?

5 Answers  

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difference between main metering kiosk and check metering kiosk

0 Answers  

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