Are Shaft Currents Affecting Your Machine Reliability ?

Source of Shaft Currents

Electrostatic

        • Wet steam, product friction, etc.

⇒  Electromagnetic

        • Electrical machine inducted voltages and residual magnetism in components.

Prevention and Protection

Reliable Shaft Earthing

        • Use brushes with minimal contact resistance with the ability to maintain reliable contact at all times even in oil splash conditions.

⇒  Components Free of Residual Magnetism

        • Ensure ALL machine components are free of residual magnetism.

        • Specify Gauss levels on new and repaired components.

        • Demagnetise existing machinery during planned outages.

Monitoring of Shaft Currents

Periodic

        • Use a scope meter to trend magnitude and wave characteristic.

        • Do not use an RMS multimeter.

⇒  On Line Continuous

        • Use the RDM monitor for on line display and alarming.

        • Download data for further analysis.

        • Connect to SCADA for remote alarming.

12 + 12 =

Address

9 Ramble Road,  Athlone Park

Durban, South Africa

Phone

+ 27 87 701 0458

Email

info@westwardmonitoring.co.za