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  1. oldnotbold

    Connecting 10MW solar plant to the grid

    I think one way to implement such a solar converter system would be to use a topology like the Siemens-ROBICON Perfect-Harmony Motor Drive system. This uses series connected low-voltage cells, (i.e. each one fed from relevant PV units), in each phase linked together to build up the...
  2. oldnotbold

    3.5 MW motor starting problems continue...

    Ters, this project seems to be a veritable minefield and will probably take years off your life! I would seriously recommend some sort of design review, or Site Acceptance Test, together with the Softstart/Control panel manufacturer. Is this ABB? If it is, I'm a bit surprised that they haven't...
  3. oldnotbold

    3.5 MW motor starting problems continue...

    Does your Soft starter use IGBT's or thyristors? Power Converters may develop short circuits or faults and the resultant fault currents must be cleared quickly. Fast acting fuses are normally used to protect the semiconductor devices. As the fault current increases, the fuse opens and clears the...

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