Insulated Bearings are used to prevent damage that may occur due to electric current.

The best way to prevent bearing currents is to use insulated bearings. Since these bearings are resistant to potential differences of 1000V and above, they prevent bearing currents. However, it cannot prevent a voltage induction on the shaft. For this reason, it is necessary to use both insulated bearings and ground the shaft in order to transmit the bearing currents caused by shaft voltage to the ground in a harmless way.