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Hydroelectric generating units require specialized monitoring techniques for

detecting and diagnosing potential failure modes in the generator, shaft,

bearings, and the turbine. The actual techniques used for a given application

depend on the size of the machine, its construction, maintenance history,

operating regime and the experience of the operation and maintenance crew.

Brüel & Kjær Vibro offers several standard application monitoring packages that

can be customized to your specific requirements.

Compass 6000 application monitoring packages

10

Potential failure mode

VIB

*

AG

*

MF

*

PDA

*

CAV

*

Unbalance (mech., elec., magn.)

Shaft bended and misaligned

Rotor rub

Bearing wear and oil whirl

Foundation, loose mech. parts

Rotor-Stator (offset & shape)

Stator winding insulation

Generator Air Gap

Stator core/frame/winding

Runner clearance

Wicket gate and globe valve

Cavitation and erosion

Mechanical

Generator

Turbine

MORE ABOUT...

VIBRATION

AIR GAP

MAG. FLUX DISCHARGE CAVITATION

* VIB = vibration, AG = air gap, MF = magnetic flux, PDA = partial discharge analysis, CAV = cavitation