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Recent content by Acca

  1. Acca

    Rotating Diode Open Circuit failure

    Thanks for the information to consider. Especially that the Synch relays may not be suitable. I was thinking that the synch relay would prevent the occurance of the diode failures. The factory AVR Unregulated (Cct cards not connected) voltage droop is No load 495V/61.5Hz to 472V/58.5Hz at full...
  2. Acca

    Rotating Diode Open Circuit failure

    We have been rectifying the above fault on machines in a marine application. The machines are a SIEMENS 1FR6 454 1800 Rpm 450V 60 Hz 812 kVA @ 0.8 PF. They are usually configured with at least 2 running insysnchronous at all times. We suspect a contributing factor of the failure is the ships...
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