if we want to increase the back up time of an UPS what should we do ? if we want to decrease the charging time of a battery/batteries attached with the UPS what should we do ?

6 Answers  

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as ac supply is given 2 the transformer why it doesnot depends upon powerfactor????

2 Answers  

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Whats difference between a single phase & a three phase motor?

4 Answers  

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without any theoretical calculations, can u approximately tell the current rating of a motor(above 30hp)working at 415VAC.

7 Answers  

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What is the difference between a Root Locus plot and a Bode plot?

0 Answers   GE,

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how to select the mpcbs and contactor for 3 phase 30 hp star delta motors.for plc control.and tell me the calaculation for future use.

0 Answers  

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hello everybody. please tell me the function of transformer bushing,s. i heared somewhere that it saved transformer winding from sky electricity. please tell me if that is right then how it work,s. Thank,s.

2 Answers   3EEE,

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what questions will be asked for 11/33KV licence interview APSEB hyderabad. Can any one share question and answers.

0 Answers  

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why we usually call 415 volts instead of 440 volts

3 Answers   S Tech,

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Where we use 30mA , 100mA & 300mA RCCB ?

3 Answers   BEL,

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can you explain the rms value in simple words....

5 Answers  

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what is the difference between mho characteristics and quadrilateral chara in distance protection

1 Answers   Essar,

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