dear all, How do i increase UPS (1000VA)backup time ? i have connected 2 12v wold you please 120 aH battery externally. ups charge the lead acid battery only 12.7 volt. backup time only 10.00 minuts and gose off. can any one of you help me?

1 Answers   Technomax, ups,

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What are the three types of compensators?

0 Answers  

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What is the SPEED of electricity?

1 Answers  

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Is it reuired to use house service barcket for 31/2 core 300 Sq.mm cable,if the distance between pole & shop is around 2 mtrs only or can I hang the cable with GI support in air? upto what size of cable GI serrvice btacket is necessary?

1 Answers   HAL,

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when a hand crancked meggar is used to check most three phase induction motors, how many tests r rquired? Why?

1 Answers  

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What is the differemce between Pulse transformer and Welding transformer.

1 Answers   BARC,

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what are corona losses

3 Answers   Siemens,

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Why capacitor bank ratting Kvar?

1 Answers  

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why we use the 100% and 95% stator earth fault protection for the synchronus generator ?

0 Answers   Operational Energy Group,

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In a 3 phase induction motor(without connecting supply) if we rotate its rotor by hand and check resistance of stator winding at motor terminal box its resistance varies why ??

3 Answers   Jindal,

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why transformer is giving some humming noise .....?

11 Answers   Electrotherm, JSW,

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why we use ac system in india why not dc

3 Answers  

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