Motor Protection

SPM Synchronous Motor Protection & Control

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

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  • Collector-ring synchronous motors

Protection & 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