Fluke Phase Sequence Tester, 10 to 700V AC Voltage Range

These instruments help to show the direction a 3-phase motor will rotate when connected to a power source. By identifying the phases and rotation, they can help to ensure correct motor installation and prevent damage to the motor or electrical system. LEDs indicate orientation (CW or CCW) and whether each phase is live. The direction of rotation of a 3-phase motor can be changed by reversing two of its stator leads.