Interested to Buy Any Domain ? << Click Here >> for more details...
ups and invertor battery selection chart and full formula
- 2 Answers
- 17822 Views
- APC, I also Faced
- E-Mail Answers
Answer Posted / thowsif_emerson_csm team
UPS Battery Cacl:-
BATTERY RATING CALCULATION:-
The formula employed rating calculation is as stipulated
below :-
FORMULA EMPLOYED :
DC Current X Duration in Hrs
Capacity of Battery ( AH )=%age capacity utilization
UPS(KVA) x 1000 x Load Power Factor (=1)
Where , DC Current=Inverter efficiency x End Voltage
Hence , VAH = AH x Nominal Voltage
For e.g. : for 3 KVA UPS , 1 hour Backup :
3 x 1000 x 1
DC Current= 17.0 A
0.93 x 10.5 x 18
17.0 x 1.0
Battery ”AH “ = 27.4 AH
0.62
Hence , 18 nos of 12V/28AH batteries will suffice .
TOTAL VAH = 18 x 12 x 28 = 6048 VAH
The following assumptions have been made in the above
calculations :-
1. DC Voltage – 216 for 3 KVA
2. End cell voltage / battery of 10.5 V
3. Load Power Factor = 1.0
4. Inverter efficiency = 93%
% Capacity utilization is :
Duration % Capacity utilization
½ hr (30 mins) 52%
1hrs 62%
2hrs 74%
3hrs 83%
4hr 85%
For ups and invertor battery selection chart lOG On to:-
http://www.sharanapower.com/selection2.htm
| Is This Answer Correct ? | 22 Yes | 10 No |
Post New Answer View All Answers
how can we calculate the ampacity of the electrical wire/cable. and what are the factors must be considered. pls. elaborate.
(1)Can earth and be conected together (2) what is the diferent between earth & neutral
Enlist four components of electrive drives.
What is the comparison of PILC and XLPE cable
What conditions are required for transformer to operate at low frequencies ?
What will be the impact on motor performance if a LT motor is rewound with changed motor winding data as given below:- Original winding data: total 04 wires = 02 wires of 17 SWG + 02 wires of 16.5 SWG. Changed Winding data: total 03 wires of 15.5 SWG wire size Motor rating: 160KW, 740RPM, 415V, ID FAN application. Normal Running Current = 95% of FL Current.
physical identification of HT & LT panel
how the B-H loop obtain under the static condition
What is q factor?
1.what is difference between ATS & STS main use. 2.what is difference between ACB& VCB With symobles,and main partes, manimum range. 3.How many types of relays and main function.
what is the synchronous timer ? and it applications.
how can we change the phase angle b/w two phase?
What is thresh hold value of current?
What is different between resistance grounding system and resistance earthing system?
what is the principle of operation of tungstun bulb ??
