Allen-Bradley PowerFlex 525 Original Instructions Manual page 5

Improved Ride Through
Operation Down to 1/2 Line Voltage
The PowerFlex 525 drive allows for the selection of 1/2 DC Bus operation, for use in critical applications where continued
drive output is desired even in the event of brown out or low voltage conditions. The PowerFlex 525 drive also supports
enhanced inertia ride through for additional low voltage mitigation.
• Selectable 1/2 line voltage operation.
• Increased power loss ride through.
Optimized for Common DC Bus Installations
Enhanced Control of Internal Pre-charge
Common DC Bus offers additional inherent breaking capabilities by utilizing all the drives/loads on the bus for energy
absorption offering higher efficiency and cost savings. The PowerFlex 525 drive has been optimized for use in Common
DC Bus or Shared DC Bus installations.
• Configurable pre-charge control using digital inputs.
• Direct DC Bus connection to power terminal blocks.
Safety Inside using Safe-Torque-Off Function
Safe Torque-Off is a standard safety feature of the PowerFlex 525 drive to help protect personnel and equipment. Safe
Torque-off allows you to restart your application faster after a safety-related situation.
• Safe Torque-Off functionality removes rotational power without powering down the drive.
• Embedded safety reduces wiring and saves on installation space.
• Meets ISO 13849-1 standards and provides safety ratings up to and including SIL 2/PLd.
Rockwell Automation Publication 520-TD001B-EN-E - June 2013
PowerFlex 525 AC Drive Specifications
5