Shaft grounding ring

Electro Static Technology’s AEGIS WTG shaft grounding ring protects turbines from generator failures.

Content Dam Up Online Articles 2011 03 Electro Static

Mechanic Falls, Maine, March 21, 2011—By safely channeling harmful shaft currents away from bearings to ground, Electro Static Technology’s new AEGIS WTG wind turbine grounding ring prevents bearing damage that could otherwise cause generator failure, unplanned downtime, costly repairs and lost revenues.

Maintenance-free, effective at any RPM and available for any size wind turbine generator, the ring is designed for OEM installation or easy up-tower retrofit.

High-frequency currents induced on the shafts of wind turbine generators can reach levels of 60 amps and 1,200 volts or greater. If not diverted, these currents will discharge through the generator’s bearings, causing severe electrical damage that results in bearing failure and catastrophic turbine failure, sometimes in as little as six months or less. The AEGIS WTG’s patented conductive microfiber technology effectively steers these currents away from the bearings and safely to ground.

The WTG is engineered to safely divert up to 120 amps of continuous shaft current at frequencies as high as 13.5 MHz and discharge up to 3,000 volts (peak). Ideal for use as part of a preventive maintenance program to protect against premature bearing failures, it can be installed whenever bearings are replaced.

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