II. Fan system application Vibration/Temperatue monitoring type K6CM Target Application Fan motors for air handling units Facility details Outdoor unit Outdoor unit Air conditioner that sets the temperature and humidity of the air to comfortable levels before sending it inside. Outside air processing unit Indoor unit Motor operation conditions Fan system 22kW/200V/4poles Inverter drive frequency: 50Hz Indoors Failure mode Deterioration over time Detection parameters Acceleration Air-conditioner Acceleration measurement results obtained from K6CM-VBM 3.5 4 Moving Average Times: 0 3 Measurement value under abnormal operation:
2.84G Acceleration (G) 2.5 Abnormal motor making abnormal noise 1.5 2 1 Warning (G) Threshold warning 0.5 Normal 0 0.0 2.0 4.0 6.0 8.0 10.0 12.0 Measurement time (minutes) Ч10 4 Shaft diameter D [mm] X Rotation speed N [rpm] Alarm threshold accelerationo for this application (examples) Expected implementation effects Alarm threshold (Warning) 0.37G Enables remote detection of motor failure. Alarm threshold (Critical) 1.54G Detects degradation of bearings so users can replace them before they lock up. 11 10.00 1.00 0.10 0.01 0 2 4 6 8 10 12 14 16 18 20