Interested to Buy Any Domain ? << Click Here >> for more details...
How to calculate the ups battery back up? give the formula.
- 15 Answers
- 110559 Views
- Cushman Wakefield, Ethio Telecom, Exide, MacLellan, Morgan Stanley, TATA, I also Faced
- E-Mail Answers
Answer Posted / sayyed fayyaz ahmed
Calculating the UPS and Battery Backup Time
Before calculating the Battery Backup, let us know a few
factors that vary battery backup.
For and UPS with 875Va we can us a maximum load of 640
watts 677Va we can us a maximum load of 540 watts
The main thing we should understand is that whatever may be
the UPS wattage the battery backup will not vary.
The battery backup will only vary depending on the battery
Ah and the Usage Load.
To calculate UPS backup, we have a simple formula.
UPS Backup = Battery Ah * (Volts/Load) * (1/Power Factor)
Example: Let us calculate the backup for a system UPS
Load is the usage power, suppose we are running a PC then
the load is around 300 watts
Power Factor varies for device to device, the average power
factor is 1.4
Voltage is the voltage of the battery.
For a single battery the voltage is 12v.
If the batteries are connected in a series Voltage = 12 *
no. of batteries.
Battery Ah is the battery ampere used for the ups,
System UPS battery AH is 7
Then Battery Backup = 7 * (12/300) * (1/1.4)
= 7 * (0.04) * (0.7)
= 0.19 hours
= 11.4 Minutes
Note: You can use the same formula for calculating the
battery backup for home UPS or an INVERTER.
| Is This Answer Correct ? | 19 Yes | 12 No |
Post New Answer View All Answers
Why different Pressure switch used in marine boiler water circulation system
Testing report of Earthing of 3.15 MVa PTR.
Explain the different methods used in the choice of rotor slots for reduction of harmonic torques in an induction motor.
What determines the thickness of the lamination or stamping?
Define Electrical Insulation and examples of Solid,Liquid and Gaseous insulating materials?
HOW DO I CALCULATE THE SETTINGS FOR THE DIFFERENTIAL PROTECTION OF A 12kV/6.6kV, 6MVA,DYN11 XMER WITH PRIMARY SIDE CTR 400/1 AND SEC SIDE CTR 600/1?
what is the path of thunderlightening? once both a buffalo and a person were standing 5m apart but lightening hit and killed buffalo not person?
Explain how you intend to work under pressure to meet up with deadline target?
Explain and give examples about VCB?
A 11KV, 1200 A breaker combination fixed in a cubicle for HT motor.Is normally for 11 KV motor fuse is using? if Yes, What range fuse is required?
i have flexible wire. size of conductors is 0.190 mm & no.of conductors are 48. then size of wire comes 1.37 sqmm instead of 1.5 sqmm . the what is tolerance for this size.
any idea abt REVERSE METERING concept.........?
What is the disadvantage in proportional controller?
why the projects getting loss?
quantizer means?
