Background and Problem
During routine operation of a coal fired steam plant within a client’s facility, a 100 HP motor that drives one of the two coal pulverizers was tripping off-line shortly after start-up.
|Fault Zone:||Power Circuit|
We began our investigation by considering several variables brought to light with the incident:
- The inability to run the #2 Coal Pulverizer (“Pulverizer”) places the plant in a state of reduced reliability.
- The motor was tripping off-line without material loaded into the Pulverizer.
- The initial 30 second inrush set of data was inconclusive without a baseline inrush set of data with which to compare it.
- Vibration analysis was detecting increased vibration levels; however, due to the configuration and construction of the equipment, a source could not be isolated.