how I can calculate ups & battery capacity

Hello,

Basically, sizing UPS is the same as sizing transformer and generator set for the reason that all you have to do is to know/size you power capacity (in KW/KVA) after knowing the power capacity you can easily specify the power require to you UPS. formula is as follows;

P = (1.732)*V*I*PF

where:

P - real power

1.732 - sqrt of 3 and present only for three phase system

I - current

F - power factor.

In sizing UPS battery you should know/ define first your required back - up time then for their we can size you battery.

Hope this helps.

Regards,

Benn

For sizing the battery you need to know the following:

1. The load cycle

2. The type of battery to be used

3. The battery back up time

4. Design ambient temperature

5. Minimum temp for which the battery is to be sized

6. k factor curves of the selected battery type.

Dear Friend

You have asked two questions.

First - How I can calculate UPS & battery capacity?

Second - How I can design distribution panel for input and output?

To answer your first question - This also breaks up into two questions, First UPS ( and therefore capacity ) & second battery capacity.

UPS capacity will depend on how much load you need to support. As regards Battery capacity, answer has already been given by another member, so I will not repeat, though we make battery chargers with DC distribution board for substation application and supply complete DC system with battery. Apart from India, we have installations in 12 other countries also. For your requirement, you can send me an e-mail to ashoktoshniwal @yahoo.com or uni_insta@ dataone.in

Your second question - distribution panel design - I cannot answer because I donot know the intricate details of HT design.

Thanks and regards

Ashok Toshniwal, Bangalore, India.

in UPS panel, you can make 2 inputs

1. from MCC

2. from batteries

make the system like this, source come from batteries as a DC supply to the Inverter (commonly include, if we buy UPS panel).and from inverter, electric supply given to your uninterrupt load.Inverter change DC to AC.

and then AC power supply that come from MCC, supply your uninterrupt load and also use to charge the batteries.

normally, power supply come from MCC, if MCC have fault, contactor to AC supply opened, contactor to supply from batteries closed and supply come from batteries...