UPS battery Back time = no.of Batteries * Ah of the Battery / output KVA * 130 ? what is the 130 means ? can any one help? because all are using this formula how its came 130?

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which connection is there in a rotor of the motor

2 Answers   All Trades Electrical, HAL,

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please give me all the Alarm .Trip ,Safety Relays & Conditions of UPS Systems mail me on ashokbabunhce@gmail.com

0 Answers  

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how we can produce negative DC voltage ? please explain it .,thank u

1 Answers  

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In iduction motors the current is higher than normal for both the cases when the voltage appllied is more than the rated as well as less than the rated, why?

2 Answers  

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which type of stability limit is higher,steady state or transient? why?

0 Answers  

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What is meant by time harmonics and space harmonics?

0 Answers  

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why is the HT voltages are in multiples of 11KV

1 Answers   Clariant,

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what is resistance?

5 Answers  

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what is Princepale of Transformer Taps.

1 Answers  

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How to identify phases in the transformer like motor and AC generator but one condition without phase indication like(RYB,UVW)?

1 Answers  

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how to find total current when kva is 30.4 given ? should we use root 3 (1.732) in the formula?

2 Answers  

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