Battery installations. Sanitary part

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ENCYCLOPEDIA OF RADIO ELECTRONICS AND ELECTRICAL ENGINEERING
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Section 4. Switchgears and substations

Battery installations. Sanitary part

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

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4.4.40. Accumulator battery rooms in which batteries are charged at a voltage of more than 2,3 V per cell must be equipped with stationary forced supply and exhaust ventilation.

For battery rooms operating in the mode of constant recharging and charging at a voltage of up to 2,3 V per cell, the use of stationary or inventory devices for forced supply and exhaust ventilation should be provided for the period of battery formation and control recharges.

Required volume of fresh air V, m³/ h, is determined by the formula

V = 0,07 I_zar n

where Izar - the highest charging current, A; n is the number of battery cells; at the same time, the concentration of sulfuric acid in the air of the battery room should not exceed that specified in SNiP 2.04.05-91 * (ed. 1994) of the Gosstroy of Russia.

In addition, to ventilate the battery rooms, natural exhaust ventilation must be provided, which provides at least one air exchange per hour. In cases where natural ventilation cannot provide the required air exchange rate, forced exhaust ventilation should be used.

4.4.41. The ventilation system of the battery rooms should serve only batteries and acid. Emission of gases must be carried out through a shaft that rises above the roof of the building by at least 1,5 m. The shaft must be protected from atmospheric precipitation. The inclusion of ventilation in chimneys or in the general ventilation system of the building is prohibited.

4.4.42. When installing forced exhaust ventilation, the fan must have an explosion-proof design.

4.4.43. The suction of gases should be carried out both from the upper and lower parts of the room from the side opposite to the inflow of fresh air.

If the ceiling has protruding structures or slopes, then provision should be made for extracting air from each compartment, respectively, or from the upper part of the space under the ceiling.

The distance from the upper edge of the upper ventilation holes to the ceiling should be no more than 100 mm, and from the lower edge of the lower ventilation holes to the floor - no more than 300 mm.

The air flow from the ventilation ducts must not be directed directly to the surface of the battery electrolyte.

Metal ventilation ducts should not be located above exposed batteries.

The use of inventory ventilation ducts in battery rooms is not allowed.

The air velocity in the accumulator batteries and acid rooms during the operation of ventilation devices must comply with the requirements of SNiP 2.04.05-91 * (ed. 1994).

4.4.44. The temperature in the battery rooms during cold weather at the level of the batteries should not be lower than +10 ºС.

At substations without constant duty of personnel, if the battery is selected based on the operation only for turning on and off the switches, it is allowed to take the indicated temperature not lower than 0 ºС.

4.4.45. It is recommended to heat the battery room using a heater located outside this room and supplying warm air through the ventilation duct. When using electric heating, measures must be taken to prevent the introduction of sparks through the channel.

When installing steam or water heating, it must be carried out within the battery room with smooth pipes connected by welding. Flanged connections and installation of valves are prohibited.

4.4.46. At power stations, as well as at substations equipped with water supply, a water tap and a sink must be installed near the battery room. Above the sink there should be an inscription: "Do not drain acid and electrolyte."

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

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