Answer / haider imam

vvvf is genaraly use in ac drive because only change
frequancy in ac drive in dc drive there is no any
ferequancy so how regulate this.

Answer / j.kesavan

A THYRISITOR DRIVE ,ITS VARING THE VOLTAGE AND FREEQUANCY
IN AC, DC DRIVES.

Answer / ismail

VVVF MEANS VARIBLE VOLTAGE AND VERIBLE FRIQUENCY IT TAKE DC
VOLTAGE TO RUN DAT VOLTAGE IS MAY BE 24V DC CORRENT ONLY
DEPENDING UPON THE APPLICATION IT IS BASED

Kindly give the brief explanations for checking 12.5 kvar 440V, 25 KVAR 440V, 12.5KVAR 690V, 25 KVAR 690V capacitors microfarad values. what is the microfarad values for the above four type of capacitors, and give the formula explanations briefly. I know F-50HZ, voltage, and capacitor.

1 Answers  

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whether choke act as a voltage regulator in tubelight or not?

1 Answers   Bhel,

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How to determine the short circuit current for breakers and VCB.

1 Answers   Sabic,

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When One Phase PT Missing (voltage drop ) this time current is zero of This phase(PT Missing Phase) and current is Not Zero of other Phase but PF is always Low That Why

0 Answers   HCL,

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How do we calculate the maximum amount of current in a 300 SQ.MM cable ?

1 Answers   Roto Power,

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why rating of motor in HP?

11 Answers  

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sir am giving jspl exam on 19th oct . i belong to eee, so plz send previous question papers ..........to dis id abhilash203@gmail.com

0 Answers  

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1) Explain why we don't link the two earthing system ht and mv on a pole mounted transformer sub-station.

0 Answers  

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Electrical breakdown strength of an insulating material depends on............?why because?

2 Answers  

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in conclusion why we select you?

1 Answers  

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why is control bus bi-directional?

0 Answers  

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why you don not show protection and type of isolation in key single line diagram?

0 Answers  

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