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.
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Overview
- 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
Specifications
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.
Documentation
Resource | Publication Number | Language |
---|---|---|
PowerFlex SCR Bus Supply User Manual | 20S-UM001 | |
AC Drives Common Bus Configurations Application Guidelines | DRIVES-AT002 |
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.