Electrical rooms. Ventilation and heating

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

Electrical rooms. Ventilation and heating

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

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5.1.29. For EMF, measures must be taken to remove excess heat generated by electrical machines, resistors and equipment.

The air temperature in the EMF, in which people work, must comply with sanitary standards.

The air temperature for cooling operating electrical machines should not exceed plus 40ºС. Air for cooling electrical machines must be free of dust. The air entering the stopped electrical machines must have a temperature of at least plus 5ºС.

For machines with an open ventilation cycle, shutters must be provided on the inlet and outlet air ducts, which are closed to prevent the intake of ambient air into the stopped machine.

Electric machine rooms must be equipped with temperature control devices.

5.1.30. The premises of an open battery and a capacitor plant located inside the EMF must have separate ventilation systems in accordance with the requirements given, respectively, in Sec. 4.4 and 5.6.

5.1.31. In areas with polluted air, EMF buildings should be designed in such a way that only purified air can enter them. To do this, doors, gates and other openings must have seals. These buildings are recommended to be made without windows and skylights or with dust-tight light openings, for example, filled with glass blocks. The general ventilation system of the EMP building should prevent the possibility of untreated air being sucked in.

5.1.32. Laying of cables and wires in ventilation chambers and ducts of sanitary ventilation is not allowed. It is only allowed to cross chambers and channels with wires and cables laid in steel pipes.

In the chambers and ventilation ducts of electrical machines, it is allowed to lay wires and cables with sheaths made of fireproof and slow-burning materials, as well as uninsulated tires. It is not allowed to install cable boxes and other electrical equipment in ventilation ducts and chambers of machines.

5.1.33. In the EMF, it is recommended to provide separate ventilation systems for the first floor, basement and other isolated rooms. It is allowed to install a common ventilation system in the presence of controlled dampers that allow cutting off the air supply to individual rooms in case of fire.

Installations for ventilation of adjacent fire-hazardous premises (for example, oil cellars) should not be placed in EMF.

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

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