Capacitor installations. Installation of capacitors

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

Capacitor installations. Installation of capacitors

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

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5.6.26. The design of the condensing unit must comply with the environmental conditions.

5.6.27. Condensing units with a total oil mass of more than 600 kg each must be located in a separate room that meets the fire resistance requirements given in 4.2.76, with access to the outside or to a common room.

Capacitor units with a total oil mass of up to 600 kg each, as well as capacitor units consisting of capacitors with non-combustible liquid, can be located in switchgear rooms up to 1 kV and higher or in the main and auxiliary premises of industries classified as fire-fighting categories D and D. requirements of SNiP Gosstroy of Russia.

5.6.28. When a capacitor unit is located indoors above 1 kV with a total oil mass of more than 600 kg, an oil receiver must be arranged under the unit, designed for 20% of the total mass of oil in all capacitors and made in accordance with the requirements given in 4.2.101. When located outdoors, the arrangement of oil receivers under the condensers is not required.

5.6.29. Condensing units located in a common room must have mesh fences or protective covers. Devices should also be made to prevent the spreading of synthetic fluid through cable channels and the floor of the room in case of leakage of the capacitor housings and to ensure the removal of liquid vapor from the room.

5.6.30. The distance between individual capacitors must be at least 50 mm and must be selected according to the conditions for cooling the capacitors and ensuring insulation distances.

5.6.31. The blown indicators of the external capacitor fuses must be accessible for inspection during battery operation.

5.6.32. The temperature of the air surrounding the condensers should not exceed the upper and lower limits established by GOST or the technical specifications for the condensers of the corresponding type.

The room or cabinets of the capacitor plant must have a separate natural ventilation system; if it does not provide a decrease in the air temperature in the room to the highest permissible, it is necessary to use artificial ventilation.

5.6.33. For condensers installed outdoors, the presence of solar radiation must be taken into account. Outdoor condensers are recommended to be installed so that the negative impact of solar radiation on them is minimal.

5.6.34. Connecting the terminals of the capacitors to each other and connecting them to the busbars must be carried out with flexible jumpers.

5.6.35. The structures on which the capacitors are installed must be made of non-combustible materials. When choosing a method for fixing capacitors, it is necessary to take into account the thermal expansion of the capacitor case.

5.6.36. For outdoor installation, distances from oil-filled condensers to other equipment, as well as fire-prevention distances from them to buildings and structures, should be taken according to 4.2.67 and 4.2.68.

5.6.37. When installed outdoors, oil-filled capacitors must be installed in accordance with fire safety requirements in groups with a capacity of not more than 30 Mvar each. The clear distance between groups of one capacitor unit must be at least 4 m, and between groups of different capacitor units - at least 6 m.

5.6.38. In the same room with capacitors, it is allowed to install discharge resistors related to them, disconnectors, load switches, low-volume switches and instrument transformers.

5.6.39. When dividing the capacitor bank into parts, it is recommended to arrange them in such a way that it is safe to work on each of the parts with the others turned on.

5.6.40. The capacitor unit shall be provided with devices for grounding of load-bearing metal structures that may be energized during operation of the unit.

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

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