what is mean by NPS (Negative phase sequence)fault? what is the difference between EFR & OCR faults?

0 Answers   TNEB Tamil Nadu Electricity Board, Vestas,

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what is the differenc between A.C. and D.C, which is more dangerious?

4 Answers  

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I am getting above 60 V as open delta voltage against single phase unit ICT at tertiary delta formed and ICT getting trippped on NDR. ICT tested and found in order. PTs provided on tertiary are tested and in order. what may be the reason?

0 Answers  

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Why? We r used 50sq. mm. And above size cable in 3.5 core and below size are used in 4core

2 Answers  

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how actually an anti pumping device works? what is the operational principal?

2 Answers  

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why is the transmission voltage is multiple of 11?

4 Answers  

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what is the difference between inrush curent and jurk load.

2 Answers  

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what is rotary ups?

2 Answers  

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Formula to calculate amps rating when we are having only the width & thickness of the coppper ?

2 Answers   BEL,

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how do find power factor in practically and what it means?

3 Answers  

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how to measure genset CT coil range?

1 Answers  

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what is the advantages of having in-built acvvvf (without seperate inverter in the control panel)in the drive system of elevators?

0 Answers  

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