How to measure the insulation pad under the generator bearing

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The insulating pad under the bearing is set to prevent the shaft current from flowing through the bearing, and the insulation resistance should be greater than 1 megaohm when measured with a 1000V shake meter. When measuring, the large shaft should be lifted from the bearing, so that the large shaft is not in contact with the bearing seat, otherwise it will not be measured. The shake table is connected to the bearing seat on one side and to the ground on the other.

What are you testing this for? When running, as long as the grounding carbon brush of the large shaft is in good contact, it is enough.

Insulated surface temperature measurement probe.

It is used on hard surfaces that may cause short circuits in circuits, such as motors, transformers, etc.

Summary. The purpose of the two bearing seats, one is grounded and the other is insulated to the ground, in order to avoid the formation of a short circuit by the voltage at the end of the shaft, which will produce a short-circuit current, and the short-circuit current will burn the shaft and the bearing contact surface.

The method of measuring the insulation of the bearing seat is to detect the voltage between the bearing seat and the "ground", and the voltage is normal when the generator is running.

Whether the generator insulated bearing seat is insulated during normal operation.

The purpose of the two bearing seats, one is grounded, and the other is insulated to the ground, in order to resist the formation of a short circuit by avoiding the voltage at the end of the shaft, resulting in a short-circuit current, and the short-circuit current will burn the shaft and the bearing contact surface. The method of measuring the insulation of the bearing seat is to detect the voltage between the bearing seat and the "ground", and the voltage is normal when the generator is running.

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