Electric motors and their switching devices. General requirements

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ENCYCLOPEDIA OF RADIO ELECTRONICS AND ELECTRICAL ENGINEERING
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Section 5. Electric power plants

Electric motors and their switching devices. General requirements

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

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5.3.2. Measures to ensure power reliability must be selected in accordance with the requirements of Sec. 1.2 depending on the category of responsibility of electrical receivers. These measures can be applied not to individual electric motors, but to the transformers and converter substations, switchgears and points that supply them.

Redundancy of the line directly feeding the electric motor is not required, regardless of the power supply reliability category.

5.3.3. If it is necessary to ensure the continuity of the technological process in the event of failure of the electric motor, its switching equipment or the line directly feeding the electric motor, redundancy should be achieved by installing a backup process unit or other methods.

5.3.4. Electric motors and their switching devices must be selected and installed in such a way and, if necessary, provided with such a cooling system that their temperature during operation does not exceed the permissible one (see also 5.3.20).

5.3.5. Electric motors and devices must be installed in such a way that they are accessible for inspection and replacement, and, if possible, for repair at the installation site. If the electrical installation contains electric motors or devices weighing 100 kg or more, then provisions must be made for their rigging.

5.3.6. Rotating parts of electric motors and parts connecting electric motors to mechanisms (clutches, pulleys) must be protected from accidental touches.

5.3.7. Electric motors and their switching devices must be grounded or zeroed in accordance with the requirements of Chapter. 1.7.

5.3.8. The design of electric motors must correspond to environmental conditions.

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

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