Medium Voltage Motor & Feeder Protection

Our Bulletin 857 Motor-Feeder Protection, Medium Voltage offers solutions for today’s motor and feeder protection requirements in one package. Our protection relay gives you flexible control to maximize your motor’s output capabilities, and provides current, voltage and motor protection functions. The protection relay can be integrated into a low voltage or medium voltage Motor Control Center, or can be purchased as an OEM component. Configure these relays using our bundled SetPointPS software.


  • Provides fully digital signal handling
  • Includes powerful 16-bit microprocessor
  • Offers high measuring accuracy on all the setting ranges
  • Includes wide setting ranges for the protection function can reach a sensitivity of 0.5%
  • Offers flexible control and blocking possibilities
  • Adapts to various substations and alarm systems
  • Includes SetPointPS configuration software

Product Selection


  • EMC
  • cULus Listed
Standards Compliance
  • EMC Compliance 2014/30/EU
  • Product Safety 2014/35/EU
  • EN 60255-26: 2013
  • EN60255-27:2014
  • E334349
  • UL 508
Looking for Additional Information?

To find additional product information including CAD drawing files, 3D models and more use our Product Catalog.


SetPointPS software is a relay configuration tool for Bulletin 857 and 865 relays. The SetPointPS tool reads all information directly from the device, and it can be used to evaluate disturbance recordings from the relays. The built-in evaluator uses standard COMTRADE files for saving the records. SetPointPS is compatible with all Microsoft® Windows® systems (back to and including Windows 95).

Download SetPointPS Software


Resource Publication Number Language
Motor Protection Solutions Brochure 193-BR029
Bulletin 857 Motor and Feeder Protection Relay Product Profile 857-PP001
Bulletin 857 RAA/RAD RTD Scanner User Manual 857-UM002
857-VPA3CG Profibus DP Option Module User Manual 857-UM003
Bulletin 857/865 Protection Systems IEC 61850 Interface Configuration Instruction 857-UM004
EtherNet/IP Configuration Details for 857/865 Protection System 857-UM005
Bulletin 857 Protection System User Manual 857-UM001
SetPointPS Configuration Software Programming Manual 857-PM001
Bulletin 857 Motor/Feeder Protection Relay Quick Start Manual 857-QS001
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