APC ups 1400 pro | |
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| majid ahmed 24/03/2010 13:16 |
Hi there
My name is Eng. Majid, I live in Iraq. In my country, we are suffering so much from repetitive power blackout and brownout. I own an APC 1400 pro ups, and decided to connect external, maintenance free batteries (2X 55 AH), it works fine. My problem is: How should I reduce input power sensitivity (or cancel it), to face brownout incidence? I will be thankful for any tip. I own all schematic diagrams of the ups. My email is: Thank you Majid |
| Mikkey 24/03/2010 14:40 |
majid ahmed, http://saprjkin.narod.ru/UPS_SMART.htm will help You. |
| majid ahmed 25/03/2010 09:46 |
Dear Michael
Thank you for your responce , Is there any way to do it by hardware modification? , like using a stabilized dc source instead of T1 (input voltage sensor) ,for (In Rect) ,to R64 ( IC 10) , and R55(IC7) ? to decoy IC10 ? What about generator electricity ( with harmonics and spikes )? since we rely so much on Gasoline generators ? Thanks |
| Mikkey 25/03/2010 12:22 |
You may simply measure voltage on In Rect and AC-OK in the normal operation and connect this inputs to resistive dividers, that provide needed voltage.
About generator electricity - I think, if You find ferro-resonant stabilizer (years 20-40 ago they uses widely) You solve this problem. |
| majid ahmed 28/03/2010 14:24 |
Michael
Thank you for your helpful tip. One last question; what is the appropriate data cable scheme (in your openion), used to update my ups EEPROM, since there are many schemes caused me confusion? Thanks again Yours, Majid |
| Mikkey 29/03/2010 11:47 |
 |
| majid ahmed 29/03/2010 14:18 |
Thank you Michael very much |
