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Shaft current measurement

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At a glance


Germany / Australia / Tasmania


Power Station

The Challenge

Currents flowing along the shaft of a generator or motor can cause damage to the bearings. There is a need to monitor these currents.

To measure a low current, less than 1A, in a very large conductor which could be 1m or more in diameter.

Our Solution

Rocoil flexible Rogowski coils can be made in lengths up to at least 12m. A flexible coil round the shaft used with a sensitive integrator can measure currents with a sensitivity of a few mA. The success of these measurements depends on very careful screening of the coil and integrator.

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