# Uninterupted Power Supply (UPS) Designing ...

• January 29th, 2013, 04:41 PM
LastChance
Uninterupted Power Supply (UPS) Designing ...
Any one of you that know UPS designing with all respects, please follow from the simple example and design from start to end. Please share your knowledge for all of Us. I personally need to know this.
• January 29th, 2013, 04:45 PM
MacGyver1968
• January 29th, 2013, 05:01 PM
LastChance
This is circuit diagram. I need load designing. Like if there are 50 servers taking power of 220V* 10A* 50 = 110,000Watts = 110KW So for 110KW what would be the size of UPS if i need a) 15mint full load back up b) 1hour half load backup c) 1hour full load backup etc.
• January 29th, 2013, 05:12 PM
MacGyver1968
• January 30th, 2013, 05:36 AM
caKus
First, you have to compute the energy that must be available from you system. Energy is expressed in Joules (J) and is equal to power multiply by duration in seconds.
In you example, the power is 110KW. Let suppose you want a duration of 15mn, that is 900s. The energy you need is 110KW x 900 = 99000 KJ.

The capacity of an accumulator is generally expressed in A.h.
One A.H is 1 A during 1 hour or 2 A during 0.5 hour ...
The energy that can be stored in an accumulator, V x A x duration = V x Capacity x 3600.
For instance, a typical car accumulator has characteristics such as 12V 70 A.h. The energy that can be stored in such a device is 12 x 70 x 3600 = 3024 KJ.

So, knowing the required energy, you may compute the number and characteristics of the accumulator system.