What does VVVF stands for in VVVF drive ? How does it differ from VVF drive?

8 Answers   HAL,

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an amazing situation was faced when an alive distribution panel with 415 volts and carrying almost 200Amps has become short and this metal cubical showing 220 volts against neutral and earth. to redress any confusion i checked the panel with help of single 200watts test lamp which also glowing with max.intensity b/w neutral & metal body of DB. amazing situation is that i hold the DB firmly more than once with necked foot means without insulated shoes but not received any electrical shock. whereas our all running gen sets neutral points also proper grounded and this short DB was completely earthed , this is beyond my understanding . any body explain how is it possible . our running gen set neutral also grounded firmly

1 Answers  

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WHAT IS MEANT BY DERATING OF THYRISTOR?

0 Answers   TATA, Trane,

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What is the power ratio between power in Star and Delta circuit?

11 Answers   ST Micro,

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DGs fuel and lube oil filters are not equal to one another.Why it is so.For example one MTU enginee fuel filter is one and lube oil filter-02nos other DGs are more.Please explain

1 Answers  

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Why you want to join non technical field when you are an engineer?

0 Answers  

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Do closed loop systems require manual input?

0 Answers   GE,

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How would you supply a single house hold load from a 3-phase supply coming out of a sub-station?

4 Answers   Power Grid,

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Advantages of using bundled conductors ?

3 Answers  

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Any one who apply for Ferro Scrap Nigam Limited cn join with me at rajuhalder@indiatimes.com or 09669717028

0 Answers   SSS,

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explain different losses in a transformer.

0 Answers  

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are there rmu for 3 transformer?

0 Answers   OSC,

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