What it monitors
It checks for the presence of all three phases, correct phase sequence, and in many types, voltage asymmetry.
Why it is important
A three-phase motor can be damaged if it operates with a phase loss.
Symptoms it prevents
- Humming motor.
- Wrong rotation direction.
- Overheating.
- Thermal overload tripping.
Proper use
The phase monitor usually sends a command to a contactor and does not supply the large load directly.
