How can calculate ups battery back up time?
Answers were Sorted based on User's Feedback
Answer / g.shanmugam
Battery back up time=Battery current at full load/Battery Ah
Is This Answer Correct ? | 308 Yes | 161 No |
Answer / guest
As a thump rule,if we need 1 hrs backup from the 1 KVA UPS
12V/130AH is Required,For Example,10 KVA ON-Line
UPS,Battery-12V/65AH,26 nos.
BAck-up Time=Ah of the Battery*Total no of the
Battery/Output KVA*130
BAck-up Time=65*26/10*130
BAck-up Time=1.3
BAck-up Time=60~70 Mins(Approx)
Is This Answer Correct ? | 219 Yes | 147 No |
Answer / r.gopalakrishnan
SEE SUPPOSE IF I NEED 740 WATTS USAGE BACK UP TIME UP TO 3
HOURS, THAN I CAN CALCULATE LIKE THIS(EXAMPLE 1
PC@350WATTS,3 FANS@80X3=240WATTS& 3TUBE LIGHTS
@(40+10CHOKE)=50=150WATTS)TOTAL=740 WATTS REQUIRE,= 740
DIVIDED BY 12 V=(61.666667)>61 Ah per hourx3
ours=183Ahbattery,(180Ah Battery).now you have selected
battery & than select a UPS/inverter that is you can only
get 80% of your UPS/inverter.Ex;1000 watts Ups/inverter.that
will be always safe for you & ever.thanks.R.GOPALAKRISHNAN.
Is This Answer Correct ? | 96 Yes | 40 No |
Answer / sss
UPS Backup=Battery Voltage*Battery Ah/Load (watt)
Is This Answer Correct ? | 98 Yes | 47 No |
Answer / subir kumar manna
UPS BACKUP TIME= NO OF BATTERY X AH OF BATTERY /OUTPUT KVA
X130
Is This Answer Correct ? | 66 Yes | 41 No |
Answer / parameshwara.s
Tell me on a 5 KVA UPS with 12 Batteries of 65 AH how many
hours of backup will I have on full load.
Is This Answer Correct ? | 36 Yes | 11 No |
Answer / n.muthukumar
ups backup time=battery AH*battery efficiency*no.of
batteries/ups capacity in kva*130*output power factor
for example:65*0.9*10/5*130*0.8=1.125
approximately:1hr 15min
Is This Answer Correct ? | 39 Yes | 21 No |
Answer / claudiu
You can calculate the max time to use a UPS with this
formula
T max = efectiv energi / average power of the energy
that min
T max = 1377 (this is a constant, it's so big because it's
calculate in seconds)* capacity of batery in volts 12V *
capacity of batery in amper's 10Ah or other valu * number
of moduls (number of bateris to use) / how mutch power you
want to consum in W
for exemple
I have 8 baterys with 12V and 10Ah and I want to standup a
computer with 300 W consum
so
1377*8*10*12/300 = 4406.4 seconds that min 4406.4/3600 =
1.2h
sorry for my english
best regards,
Claudiu from ROMANIA
The sours is
http://en.wikipedia.org/wiki/Uninterruptible_power_supply
Is This Answer Correct ? | 29 Yes | 16 No |
Answer / asela
nomber of battery * battery voltage * each battery AHR
(130AHR total/ nomber of battery)130/260* efficiancy 90
PERCENT/ tatal VR.
26*12*5*0.9/1000
1 HR AND 4 MINUTES
Is This Answer Correct ? | 38 Yes | 27 No |
Answer / yogesh
UPS backup time= Ah of battery * no of battery/output kva * 130
Is This Answer Correct ? | 73 Yes | 68 No |
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