Current Monitoring Relay

Our Bulletin 809S Current Monitoring Relays offer state-of-the-art supplementary protective functions that are easily added and applied to your motor control circuits.

Popular Resources/Quicklinks
Motor Protection Solutions Brochure MachineAlert Monitoring Relays Product Profile MachineAlert Dedicated Function Motor Protection Relays Selection Guide


  • Provides under- and over-current detection

Product Selection


  • cULus Listed — File No. E14840; Guide Nos. NKCR, NKCR7
Standards Compliance
  • EN 60038
  • EN 60664
  • UL 508
Looking for Additional Information?

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


Resource Publication Number Language
Motor Protection Solutions Brochure 193-BR029
MachineAlert Monitoring Relays Product Profile 809S-PP001
Supplemental Motor Protection Devices Specifications Technical Data 809S-TD001
Bulletin 809S Current Monitor Installation Instructions 809S-IN005
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Typical applications for Bulletin 809S Current Monitoring Relays include:

  • Blowers
  • Compressors
  • Conveyors
  • Cutting and Drilling Machines
  • Fans
  • Mixers
  • Pumps
  • VFD-Controlled Motors