How to increase the backup of three phase ups?

1 Answers  

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1)What will happen when 240 VDC supply is connected to 240VAC supply(DC supply +ve is connected to phase of AC supply & DC supply is to neutral of AC supply). 2)Also what will happen when 240 VDC supply is connected to 240 VAC supply in reverse polarity as of Sr. No 1.

2 Answers  

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What is the formula for calculating transformer Efficiency?

2 Answers  

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What is Hi-Pot Test for Grid Station HV Equipments?

2 Answers   Siemens,

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what is EIB lighting control system? what is the advantages of this system?

0 Answers  

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Brief difference btween aluminium & copper conductor

2 Answers  

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Why thwe Direction of Rotation of a TABLE Fan & CEILING Fan are different?

8 Answers   Wipro,

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how can I calculate charging current of cable/overhead conductor? what is roll of voltage in it ?

0 Answers  

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Can we get the shock if Power system is unearth means delta type take an rated voltage as 6.6 KV?

9 Answers   Reliance,

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Resistance of low voltage side of transformer compared to high voltage side is A less B equal C more D depens on design

1 Answers  

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my 10 hp submersible pump is tripping when connected through ELCB.I have checked the megger value of the coil's with body.It was found to be 0.2mega ohm.that is leakage is there.But when connected to mccb it is not tripping.no leakage current in the motor.Is it safe to connect to mccb? what are the problem's will arise if future?also tell me in ELCB no neutral is connected to motor.than how ELCB was working?

1 Answers  

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Which loss in DC machine is maximum?

1 Answers   IFFCO,

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