How to know the back up time for a 5KVA UPS which is connected to 15 nos. of c

How to know the back up time for a 5KVA UPS which is
connected to 15 nos. of computers? Is there any formula for
this? pls. tell me.

Question Posted / sreenu

1 Answers
8484 Views
S V Sugar, I also Faced
E-Mail Answers

How to know the back up time for a 5KVA UPS which is connected to 15 nos. of computers? Is there a..

Answer / k.prakashchandra

Back up time is dependent on storage capacity of
battery.vxAH=stored energy in watt hours. Divide this by
load in watts to get back up time in hours.If the batteries
are in parallel add up AH.If in series, AH of one battery is
to be considered adding voltages. Use identical batteries.

Is This Answer Correct ?

4 Yes

0 No

Post New Answer

More Electrical Engineering Interview Questions

what is the meaning of x,m,k in the relays?

0 Answers ITC Infotech,

Hello sir This is prakash from bangalore i have a doubt why we have to maintain DG power factor in the range 0.78 to 0.8 Perhaps i f it is increased means what will happen in DG

3 Answers

when voltage increases then current also increases then what is the need of over voltage relay and over current relay? can we measure over voltage and over current by measuring current only?

1 Answers

What is the difference between phase current & line current, how both can be measured in star and delta system

9 Answers Doshion, MIT,

A 500 V shunt motor runs at its normal speed of 250rpm when the armature current is 200A. The resistance of the armature is 0.12 Ω. Calculate the speed when a resistance is inserted in the field reducing the shunt field to 80% of normal value and the armature current is 100A.

0 Answers VECL,

what is formula of dc current and resistance.

2 Answers

Is it possible to make a 5P10/ CT Ratio 50/1A Burden 5VA

0 Answers Penspen,

Explain about p.t?

0 Answers

what is the use of Auto re-closer?

0 Answers

Dear all, is ther any body who can tell me about the setting of ACB(air circuit breaker ). what kind of it,s setting is and how to do it,s setting. also please tell me the setting of VCB(vaccume circuit breaker) . please tell me their setting,s. i will b very thank ful to all of u. Thank,s and Regard,s. Muhammed Ikram.

2 Answers

what is the function of supervison relay?Draw its wiring diagram.

2 Answers IBM, R.R. ISPAT LIMITED,

i am electrical and elctronics engg passed out in 2009 want to attend for reliance placements.plz send me apttitude ,technical and hr question answers to my mail plz. my mail id-kat.bindas@gmail.com

0 Answers

For more Electrical Engineering Interview Questions Click Here