PRA Series Phase Sequence Monitor
For applications where only the phase sequence is critical, consider the PRA Series Phase Sequence Monitor. When the phase sequence is correct (ABC) and the operating voltage is present on all phases, the relay will energize and the green LED indicator will glow. If the phases are in reverse rotation, the relay will not energize and the red LED indicator will glow. Please note that the PRA Series Relay will not detect phase loss while the motor is turning.
For Critical Motor Direction Applications
Plug-in or Encapsulated Versions