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Home > Grid Automation > Protection Relays > Legacy Motor Protection > SPM - Legacy
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SPM - Legacy
Synchronous Motor Protection & Control
SPM Synchronous Motor Protection & Control
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Manufacturing for SPM has been discontinued. As an alternative, please consider the 869 with integrated SPM.

The SPM controls starting, synchronizing, and protection of
collector-ring or brushless type synchronous motors.

Harsh Environment Conformal Coating option. View More Info...

Applications
  • Collector-ring synchronous motors

Protection and Control
  • Field application
  • PF regulation maximizes efficiency
  • Reluctance torque synchronizing
  • Re-synchronizing
  • DC field current loss
  • DC field voltage check
  • Incomplete sequence
  • Field winding overtemperature
  • Power factor (pull-out)
  • Stall/acceleration
  • Restart lockout