PowerFlex SCR Bridge Bus Supply

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.

PowerFlex 20S SCR Bridge Bus Supply
  • Overview
  • Product Selection
  • Specifications
  • Documentation
  • Resources
  • 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

To view commonly ordered and quickly available products, use the Product Configuration Assistant for our complete product offerings.

Specifications

TitleNumberDownload
PowerFlex SCR Bus Supply User Manual20S-UM001

Certifications

  • CE marked for all applicable directives
  • cULus

Certifications apply when product is marked. See our Product Certification site for Declarations of Conformity, certificates and other certification details.

Product Certifications

See our Product Certification site for Declarations of Conformity, certificates and other certification details.

Documentation

TitleNumberDownload
PowerFlex SCR Bus Supply User Manual20S-UM001
AC Drives Common Bus Configurations Application GuidelinesDRIVES-AT002
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Product Certifications

See our Product Certification site for Declarations of Conformity, certificates and other certification details.

Configuration & Selection Tools

  • CrossWorks — Convert competitive catalog numbers to similar Allen-Bradley® products.
  • ProposalWorks — Build complete quotes and proposals.

Other Resources

  • Drives Support — Support resources for all drive products.
  • Knowledgebase — Visit our online resource for technical information, support chat and forums, software updates, and product safety advisories/notices.

Applications

Typical applications for the PowerFlex 20S Common Bus Power Supplies include:

  • Paper-Making Machines, Finishing Winders, Calendars, Rereelers
  • Metal-Rolling Mills, Slitters
  • Winders, Coaters, Calendars
  • Cranes

Drives Case Studies — View our case studies site to discover how customers have applied Allen-Bradley drives products in their applications.