AC unit Fault Due to Phase Reversal from Grid

PAKISTAN BROADCASTING CORPORATION Forums High Power Transmitters Islamabad HPT-2 AC unit Fault Due to Phase Reversal from Grid

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    Asad Javed

    1.AC unit 1 was not working properly
    2. Cause: Due to phase reversal over current flow caused the magnetic contactor faulty, it was not passing the 1 phase properly.
    3. The compressor was heating up even it was not on load.
    4. Rectification of fault: After verifying that one phase is missing due to contactor we replaced that.
    5. Root cause: Due to phase reversal from grid the compressor caused overcurrent flow.
    6. Remedy of Root cause: Previously the AC plants were not energized through AVR. So we changed the power connection and connected the AC plants with AVR. Unit

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