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komez
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Join Date: Oct 2010
Location: Keffi,Nigeria
Posts: 18
Good Answers: 1

Actual Load Calculation

10/15/2010 11:23 AM

How do i calculate d loads on a BTS telecommunication site to know d rating of xformer to install.in d site there re: 2 Huawei Bts,one microwave radio,-48vdc battery,rectifier,2 airconditioners 2horse power each,ACDB,d microwave antenna takes about 60-80w.
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wareagle
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United States - Member - New Member

Join Date: Jun 2008
Location: Alabama
Posts: 1604
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#1

Re: How to calculate the actual load

10/15/2010 11:42 AM

Look on the name plate of each piece of gear and get the amps and volts. Watt = amps x volts. Add the watts up and multiply by 1.25 to get the transformer VA(watts)
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pnaban
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Join Date: Jun 2010
Location: srilanka
Posts: 2725
Good Answers: 5
#2

Re: Actual Load Calculation

10/16/2010 11:48 AM

Refer BS7671 or NEC

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jk
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Join Date: Oct 2010
Location: Canada
Posts: 41
Good Answers: 2
#3

Re: Actual Load Calculation

10/16/2010 3:17 PM

Like war eagle said,add the nameplate ratings, but depending on the rest of the loads, if the AC units are a significant portion you may need to multiply by more than 1.25, or start them up before you connect any other pieces of equipment since the start-up might draw the output voltage of the transformer down to much and damage or stall some equipment.

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