2 synchronized ups units feeding one load dilema

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    s
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    Hi

     

    A friend of mine had the following issue:

    2 parallel synchronized identical 3ph UPS units are feeding on load via a busbar, each UPS is at on end of the busbar and the load is connected at the middle of the busbar,

    He is measuring the currents and found out the following

    1- the current from each ups is different

    2- the current at the ups connection is different from the curretn at the load connection,

     

    I couldn't find a rational explination,

    Anyone can?

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