Why do we need key phrase for rotating machines?

Explain the need for key phrase for rotating machines

It is used to determine the speed, it can filter the signal through rpm or Hz, by this signal can monitor the shaft behavior.|

It’s for data analysis in system 1. This means normally speed will not connect with MMS and if the rotating machine having abnormal vibration then need to analyze when exactly it’s started so we can get some idea about vibration.|

Keyphasor is an electric pulse, or trigger, which is derived from a point on a rotating shaft, it serves as a zero phase reference for determining where the imbalance is on a rotor. The key phasor in turbo machines is necessary to find the phase angle of unbalance mass at the time of dynamic balancing.|