Lubrication of electrical machine bearings

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ENCYCLOPEDIA OF RADIO ELECTRONICS AND ELECTRICAL ENGINEERING
Free library / Encyclopedia of radio electronics and electrical engineering / Electrician

Section 5. Electric power plants

Electrical rooms. Lubrication of electrical machine bearings

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Encyclopedia of radio electronics and electrical engineering / Rules for the installation of electrical installations (PUE)

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5.1.24. It is recommended to combine circulating lubrication systems for electrical machines and technological mechanisms, provided that the type of oil used is suitable for both and if the technological mechanisms are not a source of clogging of the oil with metal dust, water or other harmful impurities.

5.1.25. The equipment of centralized lubrication systems, including those designed only for electrical machines, should be installed outside the EMF.

5.1.26. The lubrication system of electrical machines with a power of more than 1 MW must be equipped with oil level indicators and oil and bearing temperature control devices, and in the presence of circulating lubrication, in addition, oil flow control devices.

5.1.27. Oil and water pipelines can be laid openly to the bearings or in channels with removable coatings made of non-combustible materials. In necessary cases, hidden laying of pipelines in the ground or concrete is also allowed.

The connection of pipes with fittings is allowed by flanges.

Diaphragms and valves should be installed directly at the places where lubricant is supplied to the bearings of electrical machines.

Pipes supplying oil to bearings electrically isolated from the foundation plate must be electrically isolated from bearings and other parts of the machine. Each pipe must have at least two insulating gaps or an insulating insert with a length of at least 0,1 m.

5.1.28. Where necessary, EMFs must be equipped with reservoirs and a piping system for draining dirty oil from oil-filled electrical equipment. Descent of oil into the sewer is prohibited.

See other articles Section Rules for the installation of electrical installations (PUE).

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