synchronization protection relay / current / voltage / power factor



  • Measured/monitored value:

    synchronization, current, voltage, power factor

  • Other characteristics:

    panel-mount, single-phase, DC, for motors


In collector-ring or the brushless type of synchronous motors, the SPM can control the starting, synchronizing or even protection thereof. Specialized coatings are available for harsh environments. The devices can be used in conjunction with collector-ring synchronous motors. They are suitable for field applications.

These have a DC field voltage check, a DC field current loss, re-synchronizing mechanisms and an incomplete sequence. They also feature a restart lockout. These devices help maximize efficiency and have a reluctance to torque synchronizing, as well as a field winding over-temperature.

Other GE Grid Solutions products

Protection & Control