Looking for Eastar 430-0025A.7 Isolation Transformer for APC MX5000 UPS Conversion

Howdy folks I'm Rick I am searching for a transformer to use in a UPS backup computer power supply I have converted to power my off grid house in the bush .. the transformer is a 430 0025a.7 made by Eastar . the only one I have found was on your forum and I think it was for sale by a person named Spec_nS .. I tried to contact him but I don't know if the translator worked as I hoped If someone knows him , or if he himself reads this please contact me on this forum or at my email rpwzxc(_at_)xplornet.com I'm Rick Werbeski

Hi Rick! It seems entirely possible that you could find a replacement for the transformer you specified which would work exactly like the original. Could you please provide the UPS model this transformer comes from? Maybe its schematic would reveal the transformer's specs so we could find something less unobtainable

Thanks for your help the ups is a 2 piece APC 5000 watts. the control box is the top box model# mx5000eu , serial# wm0121006175 it is OK .. The bottom box is the main power transformer model # mx5000iu serial# wmo121005965.. the small output control transformer -430-0025a.7-, "that I need" is on a capacitor board-#640-0603-b-rev7. inside the bottom box. I hope these numbers help to locate a crossover or even an output schematic for the 430-0025a.7 transformer, I have not been successful finding anything... the transformer is an 8 pin through board mount. thanks a whole lot rick

Hi rpwzxc,
430-0025 is a typical APC transformer used in SMART UPSes for voltage measure. You can find it in SUxxxI series (international version, for 230VAC). If you can not find it, please send me an mail, I have some such xformers.

thanks rkangur, for posting to me about the 430-0025a.7 transformer I have a 430-0025 through board transformer and tried it on the capacitor board in the matrix 5000 and it only gives 86 volts output at the 120 volt plugs. I don't understand what numbers I would place in the xxx part of the SUxxxI you said to look for? also I think the transformer has to have the a- and .7 on the end of the 430-0025 to be the revised and upgraded one. The 430-0025 I tried came from a 3000 watt matrix ups of the same style , but wouldn't put out 120 volts on the matrix 5000 ups. If you have a 430-0025a.7 I could sure use it thanks again rick

Hi rpwzxc,

Im out of office now. I'll try tommorow to open isolation module of my Matrix UPS to see this xformer. By the way, what voltage do you have in Canada, is it 230vac or 110vac like in USA? What is the PN of your isolation unit? Is it MX5000IUW or MX5000IUD or other one?

we have 110 volts here in Canada the isolation box is model mx5000pe and the pn is mx 5000IU it has no letter W or D at the end of the number . . inside the unit is a capacitor board PN 640-0603-B-rev7. and the transformer I need, is mounted on that board. The transformer PN is 430-0025a.7 , class 130 ,LEI-4 , R 152d , E154515. I hope that these numbers help identify if you have the transformer or the capacitor board with the trans mounted on it (the cap board is a quick connect easy to remove component) thanks again rick

Hi,

I have some time now for you. Lets make small summary: Your UPS (MX5000) has wrong output voltage (it should be 120VAC but it is about 80VAC). You suspect that xformer 430-0025 marked as T1 on capacitor board (640-0603-B rev 7) is failed. Do I have right?

The T1 is responsible for output voltage control but I suspect that the problem is in other place. It happens sometimes that T1 failes, mostly it does not give any voltage at the output pins - in this case UPS gives to high output voltage (about 300VAC) and turns off after a moment.

I have an idea how to measure this xformer and how to diagnose the whole UPS but generally I suspect that somethin wrog is in the main controller located in the module with display.
Can you send an mail to my priv mail (r.kangur@op.pl), it allow us to discuss easier.

Only the transformer is physically broken. The transformer I used, that gave me 86 volts, was from a smaller 2000 watt APC UPS. I did that to check the board and the board was OK. All I need is a 430-00025a.7 transformer to make the voltage 120 volts. I know this because I have another 5000 watt Matrix UPS and the board is good in it, and when I used it temporarily to see if it would put out 120 volts, it did put out 120 volts. But I had to put that good board back into the working UPS.

Ok, I have 640-603 board and some 430-0025 xofmers also, however without a.7 at the end of PN. We should make some tests.
Here is the board 640-603 foto. The next picture shows what voltages you have to have is some points of board if you apply AC voltage at P1 connector (left side of board).
If you apply 120VAC to the board taken from working unit and get at the output of transformer about 7,5 VAC it means that the 430-0025 xformer is the same at your and my board.

hi rkangur the photo's you sent are of the exact board and transformer that I am looking for. I already have a 430-0025 transformer and cap board , It is in a matrix 3000 watt ups and the trace pattern and amount of capacitors and the cap placement is different than the cap board(640-0603-b rev 7 with 430-0025a.7 transformer on it) used in the matrix 5000 watt ups , I think the revision a.7 transformer has to be used to handle the almost double power output needed to be controlled when compared to the first model transformer 430-0025 that was used in the matrix 3000watt ups rick

Hi.
Although 640-0603 which I have looks exactly like you need, it doesn't means that this board will work in your UPS correctly. The number 640-0603 is a umber of printed board and doesn't say anything about parts mounted on it. I suspect that, depending of the destination area (we have 240VAC and you have 120VAC) different components were mounted on this board, especially xformer T1 may be different. It is the reason why I send you photo with voltages and asked you to measure what voltages you have on your board. Your answer will help me to recognise if the xformer T1 is the same on your and my board (my T1 has PN 430-0025).
Generally in APC PN the digit after dot (7 in your case) has no meaning for us, it is information that something was changed in the manufacturing of this part (different materials etc) but functionality is still the same. I'm not sure what maeaning have 'a', may by it is 120VAC xformer version but I'm not sure.
Please measure voltages, it gives us answer.

Dodano po 2 [godziny] 14 [minuty]:

Hi again,
Some more news. APC has manufactured two versions of Isolation Module for MX (one is named Worldwide and the next one is Japan). So I think that you have the same version like we in europe. If it is true xformer 450-0025 has the same functionality like 450-0025a.7.
Whats more, Worldwide ver 640-0603 has mounted R1, R2 is not mounted, for the Japan version R2 is mounted, place for R1 is empty.
The difference between 603 bord for MX3000 and MX5000 is the quantity of capacitors. The rest is the same.

I see what you say is so on the mx5000 cap board I have, no r1-r2. and the quantity of the capacitors is less on the 3000 but the capacitance is =2 the 5000 board I will pull the 3000 board and send photo-comparison to you because there are a few differences on the smaller 430-1501a transformers on the board, the 5000 has 1 and the 3000 has 4, but the 5000 has a different type component mounted in the place of the missing 3 wound transformers ... they look like some sort of dampening air gap transformers that I have not seen before thanks rick

Look at the pictures, there are 3000 and 5000 VA capacitor boards
https://obrazki.elektroda.pl/2406251100_1371794256.jpg
https://obrazki.elektroda.pl/4235083600_1371794297.jpg

Capacitors, fuse, CT2 and T1 are exactly the same!!! I'm not sure CT1, CT3, CT4 but this is not important for us. The most important that T1 is the same. If you have uncomplete cap. brd. for 3000VA you may take T1 from this board and move to the 5000 board. It should work.

The 3000 watt board you show is way different than the 3000 watt board we have over here (that I have). But the 5000 watt board is exactly the same as the one I have. I will try the 3000 watt board and see what happens ... thanks ----Rick