Answer Posted / rajesh tokalapudi

when a dc motor is connected to a ac supply it will run
with reduced efficiency.in case of ac reactance will comes
into picture.so,increased losses due to inductance.and
there is sparking at brushes.motor will run with reduced
speed.

what is the relationship between current&voltage in practical purpose ?

5017

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What is the universal motor?

1106

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we have require a Motor (1500kW, 6.6kV, 50Hz) which shall operate at 1500rpm during 30min and after it shall run on 500rpm during 15min. The same cycle shall be repetitive during the whole working days. Which method is best and economic to achieve such type of task. VFD, VVFD, Pole changing motor etc.

1915

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what is the difference between 2 way and 4 pole selector switch???

2437

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How to calculate wire length,size & current? ( related to control panel)

2168

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Define conversion efficiency of a power amplifier.

1234

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How Can I calculate for the photometrics requirements for a street lighting? Data given are: 45 units of 6 meter light pole with 150 watts metal halide lamp, 220 volts and installed in a promenade area.

2083

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how can i get the formula to find out the cable size if i know the load of main fuse protection.

1933

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What is the difference between indoor and outdoor transformer

5918

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control & auxilary circuits used for circuir breakers

1881

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What are the classifications of oscillators?

1076

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In a voltage-controlled current source A A current booster is never used B The load is always floated C A stiff current source drives the load D The load current equals Isc

1884

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How vfd saving power.

2022

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how to setting Load amps tripping time and extra settings for load Transformer protection relay with RMU panel using C&S model relay..?

1128

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low frequency protection why recomend?

2276

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