Calculation of Battry for Industrial UPS
Calculation of Battry for Industrial UPS
(OP)
If some one suggest 200 kw Industrial UPS ..Then how to calculate the battries size and what type of battry should install.???
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Calculation of Battry for Industrial UPS
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RE: Calculation of Battry for Industrial UPS
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RE: Calculation of Battry for Industrial UPS
RE: Calculation of Battry for Industrial UPS
RE: Calculation of Battry for Industrial UPS
Variables that are required to work out the battery.
1. The rated power factor of the UPS. With a PF of 0.8 then the UPS needs to provide 160 kW.
2. The Inverter efficiency of the UPS.
3. The number of cells in the battery bank.
4. The battery autonomy required (back up time).
5. The end voltage of the battery.
So an example.
A 200 kVA UPS rated at 0.8 PF, efficiency of 93%, 210 battery cells (lead acid).
The power required by the load = 200 kVA x PF = 200 kVA x 0.8 = 160 kW.
The power required by the inverter (takes into account the efficiency) = 180 kW divided by 93% = 172 kW.
Now divide the power required by the number of battery cells - 172000W divided by 210 = 819 watts per cell.
You then need to look up battery tables, and knowing your autonomy time and your end voltage find a battery that suits. In this example if the autonomy time required was 10 minutes and the end voltage 1.7 volts per cell, then (picking a battery manufacturer at random) an Enersys SBS190F can provide 835.3 watts per cell for ten minutes down to 1.7 volts per cell, and would therefore be a decent pick for this application.
RE: Calculation of Battry for Industrial UPS
should read:
The power required by the inverter (takes into account the efficiency) = 160 kW divided by 93% = 172 kW.
RE: Calculation of Battry for Industrial UPS
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