how hazordious area is classified at an oil & gas plant and categorise suitable class of electric equipment in that area like induction motors, LCS, Lighting Fixtures Fluerescent/Flood lights Mercury& sodium lights, J.Bs, Power Cables etc

2 Answers  

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WHEN SINGLE PHASE SUPPLY AS 220V, WHY THE 3 PHASE- 4 WIRE MEASURED AS 440 VOLTS INSTEAD OF 660 VOLTS (220 VOLTS PER PHASE i.e 220x3 = 660 volts ).

1 Answers  

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what is the method to calculate the voltage drop for number of meters Example 250volts I/p at one end if the cable length is 50 meters what could be the drop?, after 100 meters how much? needs formulae.

1 Answers  

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only some transformers and some generator requires NGR why?

1 Answers  

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can we connect both delta and star to the transformer secondary and for what reason?

5 Answers   Power Grid,

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what is power factor

7 Answers   Eskom,

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Form fator is the ratio of?

5 Answers  

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For 33 kv HT line how much amps fuse to be fitted pls explain with formula

1 Answers   Suzlon,

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prove that power consumed in 3 phase delta system is 3 times as compared to 3 phase star system

0 Answers  

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What is phase cross over frequency?

0 Answers  

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What is the power rate of power transformer?

1 Answers  

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What is ignitor and why it is use in Hpmv lamp ?

2 Answers  

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