Motor and generator stator endwinding vibration can lead to machine failure if it is not caught at an early stage. Non-metallic accelerometers are required to measure and trend this endwinding vibration. Iris Power supplies reliable endwinding accelerometers based on fiber optic technology. These sensors are permanently installed and can be used with the Iris Power EVTracII, the GuardII or other spectrum analyzers. Sensors can be of the single axis or the dual axis type. Dual axis sensors can simultaneously measure vibration in the radial and tangential directions. The kits are for use with air-cooled machines.
Each Kit includes EVAII sensors with 10 m of fiber optic cable, generator frame junction box, 10 m of fiber optic extension cable used between the junction box and a box containing electro-optical drivers plus an installation guide. Kits can include one additional single axis type EVAII for installation on the stator core to quantify the effect of core vibration on the endwinding structure. A sensor install kit (with lashing materials and resins) is also included.

SENSOR SPECIFICATIONS 

Sensitivity : 100mV/g

Frequency : 5-1000 Hz (+/- 3dB)

Dynamic Range : 0-50g

Operating Temperature : -20C to +135C

Resolution (pk-pk) : <0.1µm at 100 Hz  

Resonance Frequency : >2.5kHz 

Minimum Cable Bending Radius : 5cm (2”)