Answer / mahavir jagdev

The petrochemical industry is susceptible to fire hazards. In DC motors the carbon brushes on the rotor create sparks, which can ignite the petro fumes or vapours. The AC motor speed can be controlled with electronic speed controllers (frequency or voltage type) thus the danger of fire is not there. Even in olden days the coal and other mines which had ignitable gases, had fire proof DC motors and switch gear, which was expensive.

give single line diagram of D.O.L and star -Delta starter ?

8 Answers   ABS, Al-Shuaah, Alkali Metals, Cabin Crew, Cognizant, CRI, Gwalior Distilleries, Hotels, Logicon Engineers, Max India, Nicomet, Radisson Blu, RK Company, Siemens, SLCM, Solar, Steel Strips Wheels, Sugar Factory, TATA, TCS,

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before transformer oil dielectric strenght tests are taken the oil should be allowed to settle to remove option 1 air bubbles 2 gasses 3 contamination 4 water

0 Answers  

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Why we use the D-curve MCBs in critical power distrubution.

4 Answers   Sodexo,

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galloping in transmission line is due to

2 Answers   DVC,

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in Megger what type of voltage(AC or DC) are produce.how they work.

1 Answers  

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How to calculate cable size in sq units based on motor rating is KW

2 Answers  

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What is Goerges phenomina to start SYCHNOUSMOTOR?

1 Answers  

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How RTCC works with OLTC

1 Answers   Siemens,

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what are the advantages and disadvantages of oil filled cables over XLPE cables

3 Answers   Areva, AUVA,

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My energy meter ratio is -/110/root 3,1A and connected line CT is 100/1,PT is 11kv/110 so what is the MF for meter

1 Answers   Apollo,

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why there is no grow of grass under the high voltage transmission line?

3 Answers   TATA, Tata Power,

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how  do you choose the cable size as per amps rating & the voltage drop for the same.

0 Answers   C&W,

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