Replacement of IEPEP03 Power Supply
We used Bailey Infi90 system at plant, now we want to upgrade Only Power supply IEPEP03, is there any direct replacement of than module. Because MPS3 is different in dimension.
There is however an new version released that might save you some time, MPS IV, contact your ABB supplier to provide som info about "HR Series Modular Power System IV".
Reposted from your other post for general information..
It sounds like you have the IEPAS0x modules distributed throughout the the MMUs with the modules rather than being installed in a PMU, so you only have 170mm or so available to fit a new power system into. This rules out the MPSIII and MPSIV as replacements. If the IEPAS0x modules are in a PMU however, the PMU can be be removed as well and this will provide enough space for a single MPSIII tray or an MPSIV system.
Note that the MPSI power system provided a redundant AC supply and was often used by cabinet equipment other than MMUs. If you have any loads other than MMUs connected to the AC bus-bar these loads will need a new supply as the MPSIII and MPSIV do not provide a redundant AC supply output. Assuming that only MMUs are connected to the AC supply bus-bar and you don't have space above the MMUs for a new power system but you do have space below the MMUs there are a couple of options.
Firstly, you can simply drop the MMUs by exactly 1 row. Disconnect the AC and DC power wiring between the bus-bars and the MMU and any controlway and expander bus cables. Remove the AC bus-bar to MMU wiring and bus-bar as its no longer needed. Then drop the MMUs one at a time by exactly one row leaving all of the other cables connected. You will need to temporarily remove the TU cable mounting brackets if fitted, to allow the MMU to drop cleanly. After each MMU has been dropped, re-connect the DC power wiring, brackets and any controlway / expander bus cables and repeat. Finally re-label the rows in the cabinet so that the cabinet layout still matches any drawings that might exist. You can now install a single MPSIII tray or an MPSIV system. Take lots of before and after pictures and triple check before powering back on.
If the back of the cabinet has too much junk mounted in the way to allow the MMUs to drop, another option is to add another MMU below the existing MMUs. This approach also works if you are also considering upgrading the old Infi90 IEMMU01 to the current IEMMU11/21 MMU as the expander bus cabling is not directly compatible between the old and current MMUs. There are transition cables and boards still available, but never when you need them...
Remove the AC bus-bar to MMU wiring and bus-bar as its no longer needed. After adding the new MMU directly underneath the lowest existing MMU, and starting with the lowest existing MMU, move all modules and TU cables down by exactly 1 row, adjusting the controlway and expander bus cables and jumper configuration as required. Replace the MMUs 1 at a time once they are empty if upgrading MMUs is part of the job. Re-label the rows in the cabinet so that the cabinet layout still matches any drawings that might exist. Once finished the empty MMU at the top can be removed giving enough room for a single tray MPSIII or MPSIV power system. It sounds complicated but the process "copies" 1 MMU setup to another 1 cable at a time so it is easy to do and also to verify. Again, take lots of before and after pictures and triple check before powering back on. Notes
- If replacing the IEMMU01 with IEMMU11/21 you will need new expander bus cables to suit the new MMU (NKEB01). You can connect the expander bus from an IEMMU01 to IEMMU11/21 with a transition cable (1948502?0340) and transition board (6642695?1).
- The IEMMU01 used an expander bus cable that pressed onto tinned pads on the MMU backplane and this connector had problems with oxidation under long term high humidity conditions. You should inspect the pads and cables for corrosion. The backplane area should be cleaned and the cable replaced or cleaned if not practical to replace. If any damage can be removed then reassemble with a light smear of Nyogel 759G (electrical grease) or similar. The long term solution however is to replace the IEMMU01 with the IEMMU11 which moved to a more substantial connector.
- The IEPAS0x power supplies are no longer required and can be removed from the MMUs.
Looking at the image you posted, you have a PMU installed (The MMU with the busbars on the rear and the IEPAS0x on the front directly under the IEPEP03). A single tray MPSIII or MPSIV will fit if you remove the IEPEP03/ IEFAN0x and the PMU. As Tomas and hpg indicated it is a total replacement of the MPSI power system with an MPSIII or MPSIV kit. You should probably do a power system sizing calculation first to determine if the new power system has an equivalent power supply capacity as the original.