Answer / k.prakashchandra

First charge the battery fully i.e. till charging current
becomes almost zero at 130% of rated voltage of the
battery.Then discharge till the terminal voltage becomes
90%.if AH (A xH ) discharge is more than 26 ,then the
battery is good.Do not allow charging or discharge current
exceed 5 A.

please send me previose rrb junior engineer qustion papers

0 Answers   RRB,

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what is the meaning of Ring Mean Unit in a substation or trasformer also tell me its oerpuse?

4 Answers   NPTC, NTPC,

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What is cable tray, its type, and its support?

0 Answers  

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Residual voltage & residual current used in which protection?

5 Answers   Qatar Gas, Reliance, Transformers and Electricals,

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why capacitor using the induction motor?

5 Answers  

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How to write a progrramme to turn ON and turn OFF a motor with a single push button in AB?

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what is high - pot test. what's its use?????

0 Answers  

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how we can select MCB ratings according to Voltages, Curves.

2 Answers  

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What is earth?

0 Answers   CLG,

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What will happen when we connect 2 bulbs in series between 2 phases

7 Answers   Pepsi, PowerTech,

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which fault current is maximum: 3 phase short circuit, LG, LL or LLG?? why?? in one of the problems that i have solved, 3 phase short circuit current on an unloaded generator came out to be less than the LG fault current. can anybody please explain why.

2 Answers   Bhel,

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I have carried out wiring for lighting in a shed in Industrial area which contains Metal halide lamps & have balanced in 3ph.Now when we put all the lines on in the daytime the current taken at 3phases at MCB comes to be equal i.e.28,29,28Amps respectively but in the night time i.e between 7p.m.to 11p.m. at the same MCb the current is 52,59,62Amp, though I have fit 63A MCB it is tripping in the above period.What may be the reason.? Note: This industry is located in industrial area where majority of steel ingot manufacturing plants are there. Whether this may be due to harmonic? what should I do to overcome above problem.pl suggest urgently.

4 Answers  

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