how fan speed decrease or increase by using regulator? thank you

3 Answers  

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Why you are switching off arc protection mcb when you are taking shutdown for lv board.

0 Answers   KSEB, L&T, Siemens,

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can any one explain me the where is the use of plc and scada

4 Answers  

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what happen if we give 220 volts dc supply to d bulb r tube light?

4 Answers   Genus, RMSI,

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why we are 0.8 power factor only?

1 Answers   Suman Industries,

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why secondary terminal of current transformer should not be open circuited?

4 Answers   ABB,

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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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what is the difference between RCCB and ELCB?

3 Answers  

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11 KV Power cable end earth connection insulation got burned wht is the reson pl give the resons

2 Answers  

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The neutarl to earth voltage in system is 7volts on Electricity power but it lowers to 1.3volts when load transfered to DG power.what may be the reason.

3 Answers  

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Difference between hopkinson and swinburne's test

1 Answers  

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Write the programming software name for LG, SIEMENS,Messung,AB

0 Answers  

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