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  • Users: shipelec
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  1. shipelec

    need 24 VDC auto transfer switch

    I need a 24 VDC automatic transfer switch for a shipboard application. It has to switch to an alternate power source upon loss of the normal power source. I can't use a "best voltage" diode arrangement because the normal source is not necessarily the best voltage. This switchover has to...
  2. shipelec

    IEC specifications for SCRs

    Hello, everyone, I am replacing some Silicon Controlled Rectifier units that convert 600 VAC to 750 VDC for some DC propulsion motors. I would like to reference specifications for performance and testing. IEEE 45 (2002 edition) says it should comply with IEC 60146 and 61136. Somebody gave me...
  3. shipelec

    getting tech info from vendors

    I am trying to evaluate vendor components and all I can get from them is "sure, it'll do that!" For instance, I am trying to replace the field contactors for a large DC motor. Vendor says they have something better but has provided nothing but a part number. I need to know what...

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