K6CM Target Application Pressure adjustment blower Facility details Blower for adjusting pressure within a storage tank Motor operation conditions Fan system 3.4kW/200V/2 poles Inverter drive frequency : 65Hz Failure mode Deterioration over time Detection parameters Acceleration/Velocity Acceleration/Velocity measurement results obtained from K6CM-VBM Measurement value under normal operation: 0.79G Newly installed blower Acceleration measurement results Measurement value under warning operation: 0.96G Blower installed after 6 years Velocity measurement results Measurement value under normal operation: 1.18mm/s Newly installed blower Measurement value under normal operation:
1.70mm/s Blower installed after 6 years 0 0.5 1 1.5 2 2.5 Measurement time (minutes) 10.00 (G) Warning Abnormal Threshold critical Threshold warning Threshold for this application (examples) 1.00 Example of Acceleration alarm threshold 0.10 0.01 0 2 4 6 8 10 12 14 16 18 20 Shaft diameter D [mm] X Rotation speed N [rpm] Ч10 4 Example of Velocity alarm threshold Expected implementation effects Enables remote detection of motor failure. Detects the degradation of the bearings and fan blades, so the user can replace them before they lockup and fail. 16 II.
Fan system application Vibration/Temperatue monitoring type 1.05 1 0.95 0.9 0.85 0.8 0.75 0.7 0.65 0.6 cceleration ( Warning Normal Newly installed blower Blower installed after 6 years Blower installed after 6 years 3.28G 0.80G Sha ft diam eter 3 0mm × 3900 rpm = 1 1.7 × 1 04 Alarm threshold (Warning) 0.80G Alarm threshold (Critical) 3.28G Alarm threshold (Warning) 1.8mm/s Alarm threshold (Critical) 4.5mm/s