530kW motor checks? !!

The motor testing on site is probably limited to continuity, winding resistance and ideally a 5kV insulation resistance test.

However and I apologise if you are familiar with HV working, do not yourself or have anyone working for you access the HV terminals unless you can either see the cables to the motor cut off or the demolition firms authorised person provides a permit in writing. To work on an HV circuit it should first be isolated & earthed and then for your testing the earth removed. Hopefully if the plant was properly shut down ??? the motors will have all been isolated and earthed at the switchboard. I would have expected each motor to have had probablky a vacuum contactor / HV fuse  with an isiolating/earthing arrangement for each motor. The panel then probably fed from a 11kV breaker at one of the power station's substations.

Some one competent to work on 230/400V low voltage systems would not necessarily be deemed competent to work on HV.

When doing any tests check out any auxiliary circuits if there are any (i.e. anti-condensation heaters or winding/bearing temperature sensors).

On a side note in the video a rubber mallet wouldn't cut it to get the end plate off the bearing since it should have a small fit to prevent any chance of ther bearing rotating in the the end plate. Your size of motor will I have a bearing housing which bolts to the end plate and bigger units can have split bearings. Originally there will ahve been clamps to secure the shaft for transport but I doubt you will find them, However as said before protecting the bearings during transport is important (in all 3 planes) other wise the ball/rollers and the races will get damaged. My guess bearing arrangement is ball at NDE and roller at DE. The ball bearing providing the axial location for the motor.

Not knowing the details of where you want to use the unit, does it have a strong enough supply to support starting this motor? At the power station since supplies will have been probably quite stiff it may have just been DOL or at best Star/Delts unless they used reduced volts etc. to soften the water circuit effects. Just saying make sure your location and local DNO would be OK with this size of motor and possible what kind of starting you will need to consider.


Hope this helps, good luck.

Ian

The motor testing on site is probably limited to continuity, winding resistance and ideally a 5kV insulation resistance test.

However and I apologise if you are familiar with HV working, do not yourself or have anyone working for you access the HV terminals unless you can either see the cables to the motor cut off or the demolition firms authorised person provides a permit in writing. To work on an HV circuit it should first be isolated & earthed and then for your testing the earth removed. Hopefully if the plant was properly shut down ??? the motors will have all been isolated and earthed at the switchboard. I would have expected each motor to have had probablky a vacuum contactor / HV fuse  with an isiolating/earthing arrangement for each motor. The panel then probably fed from a 11kV breaker at one of the power station's substations.

Some one competent to work on 230/400V low voltage systems would not necessarily be deemed competent to work on HV.

When doing any tests check out any auxiliary circuits if there are any (i.e. anti-condensation heaters or winding/bearing temperature sensors).

On a side note in the video a rubber mallet wouldn't cut it to get the end plate off the bearing since it should have a small fit to prevent any chance of ther bearing rotating in the the end plate. Your size of motor will I have a bearing housing which bolts to the end plate and bigger units can have split bearings. Originally there will ahve been clamps to secure the shaft for transport but I doubt you will find them, However as said before protecting the bearings during transport is important (in all 3 planes) other wise the ball/rollers and the races will get damaged. My guess bearing arrangement is ball at NDE and roller at DE. The ball bearing providing the axial location for the motor.

Not knowing the details of where you want to use the unit, does it have a strong enough supply to support starting this motor? At the power station since supplies will have been probably quite stiff it may have just been DOL or at best Star/Delts unless they used reduced volts etc. to soften the water circuit effects. Just saying make sure your location and local DNO would be OK with this size of motor and possible what kind of starting you will need to consider.


Hope this helps, good luck.

Ian