Solved

VA and Watt

Posted on 2004-03-27
4
15,145 Views
Last Modified: 2012-06-27
The ups write 600 VA how can I convert to Watt
0
Comment
Question by:teera
4 Comments
 
LVL 69

Assisted Solution

by:Callandor
Callandor earned 50 total points
ID: 10697242
Multiply the VA by 0.625 and you should have the watt rating.  See http://www.apcc.com/products/runtime_for_extendedruntime.cfm?upsfamily=21
0
 
LVL 14

Assisted Solution

by:tmj883
tmj883 earned 100 total points
ID: 10698318
When measuring DC, the Watt and the Volt Ampere are equivalent. When measuring AC, the Volt Ampere is a measure of the apparent power and works as Callandor states above approximately.
T
0
 
LVL 31

Accepted Solution

by:
rid earned 150 total points
ID: 10699289
Power in AC circuits is V times A times the cosine of the phase shift. Thus you can have an appliance that takes several amps at 230v, but if a phase shift is introduced, (e.g. motors) the real power will perhaps be very low. Still, from the viewpoint of the power supply, it still has to deliver a certain amount of current into the load. Using VA is then a much better way of describing the limits of the power supply (or the drain of the appliance) W is useful only for DC or pure resistive loads, like lightbulbs or heaters, in AC circuits.

/RID
0
 
LVL 12

Assisted Solution

by:public
public earned 50 total points
ID: 10700319
>Power in AC circuits is V times A times the cosine of the phase shift.
This does not really apply to UPS's when the load is a power supply, since the current is not a sine wave.
There is no universal conversion. Depending on the type of load, you can estimate the needed rating.
0

Featured Post

Courses: Start Training Online With Pros, Today

Brush up on the basics or master the advanced techniques required to earn essential industry certifications, with Courses. Enroll in a course and start learning today. Training topics range from Android App Dev to the Xen Virtualization Platform.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

In this article you will get to know about pros and cons of storage drives HDD, SSD and SSHD.
Every server (virtual or physical) needs a console: and the console can be provided through hardware directly connected, software for remote connections, local connections, through a KVM, etc. This document explains the different types of consol…
This Micro Tutorial will give you a basic overview how to record your screen with Microsoft Expression Encoder. This program is still free and open for the public to download. This will be demonstrated using Microsoft Expression Encoder 4.
This Micro Tutorial demonstrates using Microsoft Excel pivot tables, how to reverse engineer competitors' marketing strategies through backlinks.

785 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question