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  • Formerly Asteam Technologies | Welcome to The Era of Automation

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Allen-Bradley Bulletin 20S SCR Bridge is a non-regenerative DC bus supply that supplies power to AC drives that have a common DC bus input.

The supply converts incoming three-phase AC line voltage to a common DC bus voltage. You can configure this supply for stand-alone and master-slave applications.

  • Features
  • Six-pulse, full-wave, three-phase SCR bridge rectifier unit
  • Stand-alone and master-slave configurations (1000 A units only)
  • Built-in AC line and DC bus fuses (400 A and 600 A units)
  • Rectifier branch fuses, snubber circuit, and DC bus feedback fuses (1000 A units)
  • Over-temperature sensor located in the heat sink
  • RC snubber circuit for dampening and linearity of over-voltages
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