Golgappa.net | Golgappa.org | BagIndia.net | BodyIndia.Com | CabIndia.net | CarsBikes.net | CarsBikes.org | CashIndia.net | ConsumerIndia.net | CookingIndia.net | DataIndia.net | DealIndia.net | EmailIndia.net | FirstTablet.com | FirstTourist.com | ForsaleIndia.net | IndiaBody.Com | IndiaCab.net | IndiaCash.net | IndiaModel.net | KidForum.net | OfficeIndia.net | PaysIndia.com | RestaurantIndia.net | RestaurantsIndia.net | SaleForum.net | SellForum.net | SoldIndia.com | StarIndia.net | TomatoCab.com | TomatoCabs.com | TownIndia.com
Interested to Buy Any Domain ? << Click Here >> for more details...

HOW TO CALCULATE UPS BATTERY BACKUP TIME

Answer Posted / k.prakashchandra

Energy stored in a battery = AH x V watthour.Multiplying
with number of batteries you get total energy stored in watt
hour.Divide this by load in watt to get the backup time in
hours ,ignoring efficiency,losses and residual stored energy.

Is This Answer Correct ?    14 Yes 2 No



Post New Answer       View All Answers


Please Help Members By Posting Answers For Below Questions

Why does curving the pole faces in a dc machine contributes to a smoother dc output voltage from it?

1270


A well system is when , no. of bus bar is less or more. Tell me the concept of it.

1929


hi....I am from india..i have completed my engineering in electrical and electronics field with 58.4% and my IELTS score is 5.5 bands....Recently i received my I-20 in computer and information science from Troy university in Alabama.On 18th i have a visa interview can u please tell me what type of questions i have to answer ??????

1857


What are the advantages and disadvantages of short-pitched winding?

1099


wat system call?

1975


Differentiate between magnetic field and magnetic flux?

1134


how can we phase identification in a distribution line,how we recognise that which phase is coming for a house hold connection.help me............

2079


what are the types of electromagnetic forces developed in practical transformer?

2635


our factory is going under construction mean time transformer 1000 kva 2 nos &load break swithch 12 kv & 4 nos 750 kva 2 nos & 380 kva 2 nos generator to be errcted.how to arrange earth pits &how to earth connect & neutral pit how to calculate in earth bit size.

2112


If the rated speed of a d.c. Shunt motor is1440 r.p.m, which method of speed control would you suggested to obtain a speed of 1500 r.p.m?

1158


1. What is differential relay? How it operates? 2.How to calculate the Short Circuit Impedance in Transformer? 3.What is the alternate solution for testing of polarity by using polarity tester while its milli ammeter does not works? 4. While testing the 33KV Busbar by using Hipot kit, what should be the test voltage we have to apply? 5. What is the procedure/activities to be taken to inject the current more than 2000A by using 2000A Loading Transformer? 6. Explain how you can give the overload setting to any Motor Protection Relay for a HT motors with formula and example? 7. Why restricted earth fault protection is needed? Why can’t differential Protection is sufficient? 8. What should be the minimum and maximum ohmic value for earthing? 9. Why DC Currents are not used in transformer? 10. What is the Frequency while we step up the voltage from 220V to 11KV? Is it possible? Explain it?

2279


What is different between Difnit time and instatous over current relay

2551


specific difference of ICT&Auto Transformer

1897


How eddy current generation support the idea of train braking?

2003


why we take movement of rotor always in counter-clockwise direction in 3-phase induction motors?

1961