Shaft current measurement
At a glance
Germany / Australia / Tasmania
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.
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.