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  1. stuartfd54

    Brake rectifier

    The rectifier has input 500vac max - Output just + and - In the past I've had motors delivered that don't have the input connected if it requires an external source (240vac), you just presume that the manufacturer would wire this correctly but I will certainly review it and look at external...
  2. stuartfd54

    Brake rectifier

    Hi Bill Definitely 6 lead motor and the coil is rated at 205vdc hence the need for the rectifier. The resistance of the coil was tested at 500v using fluke insulation resistance tester and came back just over 1kOhm. As said, the rectifier comes prewired direct from the manufacturer so not sure...
  3. stuartfd54

    Brake rectifier

    Hi Keith The motor comes direct from the manufacturer with rectifier already wired up? Stuart
  4. stuartfd54

    Brake rectifier

    Hi Bill The coil winding measure 1kOhm which appears correct. No surge suppression, not sure about the diode? Stuart
  5. stuartfd54

    Brake rectifier

    Hi Scotty You refer to neutral but this rectifier is 415v input? At current it is connected through U1 and U2 on the motor terminals. I've had a look through the internet and SEW advise U1 and star terminal in the motor for a 200vdc brake coil and 415v motor. Not sure what difference this would...
  6. stuartfd54

    Brake rectifier

    Hi Waross The supply from contactor to motor are approx. 2metres. I'm not sure how much of a delay between motor start and brake release there would be but if there was a minute delay, when the motor is trying to rotate would this increase the draw current through the rectifier and eventually...
  7. stuartfd54

    Brake rectifier

    Hi Scotty This is designed from the manufacturer of the machine (Indosa can seamer) and has run for 20+ years, only having to replace the rectifier/motor on average every 4 years. Probably state of the art 20+ years ago and I know there's alternatives available but with a cost. Just struggling...
  8. stuartfd54

    Brake rectifier

    Hi Over the last 2 weeks we have had to replace the brake rectifier 3 times on a 415v 3 phase motor with 415vac/205vdc rectifier. The complete motor and brake have also been changed along with contactor. The rectifier is fed directly from the 415v from the motor so as the motor starts the brake...

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