Voltage Monitoring Relay


  • Phase loss
  • Under- and over-voltage
  • Phase imbalance
  • Phase reversal
  • Voltage quality of incoming power line

Product Selection


  • cULus Listed — File No. E14840; Guide Nos. NKCR, NKCR7
Looking for Additional Information?

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Resource Publication Number Language
Motor Protection Solutions Brochure 193-BR029
Supplemental Motor Protection Devices Specifications Technical Data 809S-TD001
Bulletin 813S Phase Monitor Installation Instructions 813S-IN002
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Typical applications for Bulletin 813S Phase Monitoring Relays include:

  • Pumps
  • Fans
  • Blowers
  • Compressors

Essential Components Case Studies — View our case studies site to discover how customers have applied Allen-Bradley components in their applications.