Ants
Electrical
- Jun 7, 2001
- 7
We are in the process of building a new plant, and as things go some equipment arrive very early and some very late. My concern lies with the preservation of rotating as well as non-rotating equipment.
Firstly, large (and other sizes) motors needs to be on space heaters (if facility is provided by manufacturer) to ensure no moisture is ingressed into the stator and rotor.
Also, they need to be rotated to prevent bearing damage. My question is this:
Some bearings are sealed grease filled and the rotor can be easily rotated by hand. What to do about white metal oil filled bearings, both sealed and oil pump cooled system. Will the weight of the rotor disperse the oil, causing the bearing to fail when turning it during preservation? If it must be turned, how often(frequency)?
We also have a spare 5MW dry type transformer in a cubicle. Is a space heater sufficient to preserve the trf insulation?
Thanks in advance
Firstly, large (and other sizes) motors needs to be on space heaters (if facility is provided by manufacturer) to ensure no moisture is ingressed into the stator and rotor.
Also, they need to be rotated to prevent bearing damage. My question is this:
Some bearings are sealed grease filled and the rotor can be easily rotated by hand. What to do about white metal oil filled bearings, both sealed and oil pump cooled system. Will the weight of the rotor disperse the oil, causing the bearing to fail when turning it during preservation? If it must be turned, how often(frequency)?
We also have a spare 5MW dry type transformer in a cubicle. Is a space heater sufficient to preserve the trf insulation?
Thanks in advance