IET
Decrease font size
Increase font size
Topic Title: UPS Supplies
Topic Summary: Isc/IL Ratio
Created On: 26 April 2013 11:15 AM
Status: Read Only
Linear : Threading : Single : Branch
Search Topic Search Topic
Topic Tools Topic Tools
View similar topics View similar topics
View topic in raw text format. Print this topic.
 26 April 2013 11:15 AM
User is offline View Users Profile Print this message


Avatar for asmcgeachie.
asmcgeachie

Posts: 39
Joined: 03 October 2006

Hi All

IEEE 519 Table 10-3 states max harmonic levels (% of IL) fro Isc/IL ratio up to 50 as:
<11 harmonics - 7%
11 to 17 - 3.5%
17 to 23 - 2.5%
23 to 35 - 1%
35 - 0.5 %
TDD 8%

We are replacing a UPS, 110Vdc system.

Anyone any experience on achieving the above specification? The manufacturers are suggesting a 12 pulse rectifier with incoming filter. However some correspondence would suggest this may be difficult to a cost effective achieve.

Anyone any experience to share here?

Thanks!

-------------------------
Andy

Statistics

See Also:



FuseTalk Standard Edition v3.2 - © 1999-2014 FuseTalk Inc. All rights reserved.