Reduction in supply voltage by 10% will change the torque of the motor by ___.

1 Answers   UGVCL Uttar Gujarat Vij Company Ltd,

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what is the principle of vvvf drive motor

3 Answers  

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How equivalent impedance is calculated in thevenin theorem?

0 Answers  

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why transformer does not obey ohms low?

3 Answers   AITM,

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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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if i have one capacitor=80 micro farad which correct the unity power factor,but i want to make capacitor bank who correct the power factor.so,how to split this capacitance value?

2 Answers  

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what is there inside an inverter and how it works?

0 Answers  

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In our factory there is one no. of Series trip HT 6KV OCB. 1. Is it possible to measure CT out put current by 440V Clamp meter? The measurement is required for knowing the exact value of current in CT secondary to set up protection for transformers. 2. plase forward the single line diagram of AMF panel?

1 Answers   HAL,

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on which power factor synchronous motor run

2 Answers   Bhel,

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What is the full name of one of choke less lamp BLL

2 Answers  

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how to put cable sizing and cable glands size for respective cable & Cable Lug size in a DB sectors???

0 Answers  

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whta does the middle finger stands in flemings left hand rule

3 Answers  

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