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Saft Power Systems PSU problems

Discussion in 'Troubleshooting and Repair' started by Bashir Ahmed, Jan 16, 2019.

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  1. Bashir Ahmed

    Bashir Ahmed

    Jan 16, 2019
    Hi friends I have a problem in saft rectifier module 1600 w. Normally the output of this module is 53V DC, but in this module I found 71V DC. How can I solve the issue?

    [mod edit .... fix typo to stop confusion]
    Last edited by a moderator: Jan 16, 2019
  2. duke37


    Jan 9, 2011
    Some details of the device it is used with would help, including pictures.
    High voltages in alternators could be due to excessive speed.
    If the module is shaft mounted, how do you measure the voltage?
  3. Bashir Ahmed

    Bashir Ahmed

    Jan 16, 2019
    It is rectifier module ,used in telecom sector as a battery charger

    Attached Files:

    Last edited by a moderator: Jan 16, 2019
  4. Alec_t


    Jul 7, 2015
    You might want to edit your thread title. This has nothing to do with shafts, but the 3342 pic does show the word Saft.
  5. davenn

    davenn Moderator

    Sep 5, 2009
    I have ... he cannot :)
  6. 73's de Edd

    73's de Edd

    Aug 21, 2015
    Sir Bashir Ahmed . . . . .

    Observations . . . .

    What we seem to have there is the battery maintenance system for telecons 48VDC line ringer supply . . . BUT . . .with there being less and less need
    for such a supply with the majority of phones now using simplified and less power hungry ringing alarm alerts.
    Or if being a miles long remoted system, it being a supply for repeater amps tapping off from.

    By the looks of that custom marble floor . . . . monetary consideration is being of absolutely NO concern . . . . just buy all new units.

    However, that Harmer Simmons company is now defunct and aparently left with back rent due and has released their internet site to a porn site.

    MOREOVER . . . with 6+ other units covers shown being torn down and visible , a good "engineer" should be able to easily take a working unit and evaluate voltages around the power switch mode and regulator circuitry to see what has gone awry in the somewhat stupendous outputting of 72VDC vice the normal 48VDC.
    For sure, you have some salvageable / cannibalizable spare working parts for evaluation, instead of having an unknown one of a kind unit.

    Your one good photo of the supply PCB did do good enough to date the units at circa 2000' ish by its parts being used.
    On what little does show on that photo, one can see the AC power coming in from the top right corner and passing down to be rectified . . hidden . . .
    and having raw DC power stored in the right bottom cluster of [email protected] E-caps to then feed to the center bottom ferrite based power transformer with its external yellow kapton tape wrap. The all important POWER semis would be mounted on the bottom corners heat sink.
    You can then see the massive width foil paths if the unfiltered 48DC supply busses coming up and into the gold colored ferrite based filter balun L202 and the DC then passes thru R-03-10-22-and 23 surge limiting resistor busses and on into the 4 respective filters to their left. The processed 48VDC then gets switched by the hefty mechanical relay above them.
    (Like relays . . . switch heater and broiler elements current capacities on electric stoves and ovens )
    48VDC at 40 amps is being one HEFTY power supply.
    And even more impressive, after charging the hefty, back up battery bank associated with it.
    Thats all I can see without better photos to ascertain the unseen portions of the PCB power devices and their amcillary drive IC .

    73's de Edd . . . . .
    . . . . . . . . . . .

    No time for a bath? . . . . Easy Peasy . . . . just wrap yourself in masking tape and remove the dirt by simply peeling it off.
    Last edited: Jan 17, 2019
  7. Bashir Ahmed

    Bashir Ahmed

    Jan 16, 2019
    Thanks for your message,actually i need the specific solution from professional who tried and solved the pcb problem i noted on it.If there any electronics engineer you have who is expert on saft power system ,please make a contact i am ready to pay him for solution
  8. davenn

    davenn Moderator

    Sep 5, 2009

    we don't do that sort of things here

    thread closed
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