Section 4. Switchgears and substations

Battery installations. Electrical part

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

Comments on the article

4.4.3. The choice of electric heating devices, lamps, ventilation motors and electrical wiring for the main and auxiliary rooms of batteries, as well as the installation and installation of the specified electrical equipment must be carried out in accordance with the requirements given in Ch. 7.3.

4.4.4. The charger must have sufficient power and voltage to charge the battery to 90% of its rated capacity for no more than 8 hours with a previous 30-minute discharge.

4.4.5. The battery installation must be equipped with a voltmeter with a switch and ammeters in the charger, recharger and battery circuits.

4.4.6. For charging and recharging motor-generators, devices must be provided to turn them off when a reverse current appears.

4.4.7. In the battery circuit, as a rule, an automatic switch should be installed, selective with respect to the protective devices of the network.

4.4.8. The charger must provide voltage stabilization on the battery buses within ± 2%.

4.4.9. Battery installations that use a battery charge mode with a voltage of not more than 2,3 V per cell must have a device that does not allow spontaneous voltage increase to a level above 2,3 V per cell.

4.4.10. Rectifier units used for charging and recharging batteries must be connected from the AC side through an isolating transformer.

4.4.11. DC buses must be equipped with a device for constant insulation monitoring, which allows estimating the insulation resistance value and acting on the signal when the insulation resistance of one of the poles drops to 20 kOhm in a 220 V network, 10 kOhm in a 110 V network, 5 kOhm in a 48 V network and 3 kOhm in the network 24 V.

4.4.12. For the storage battery, a blocking should be provided that does not allow the battery to be charged with a voltage of more than 2,3 V per cell when the ventilation is turned off.

4.4.13. In the battery room, one luminaire must be connected to the emergency lighting network.

4.4.14. Batteries should be mounted on racks or cabinet shelves. Vertical distances between racks or cabinet shelves should allow convenient battery maintenance. Batteries can be installed in one row with one-sided service or in two rows with two-sided service.

In the case of double glass vessels, they are considered as one accumulator.

4.4.15. Racks for installing batteries must be made, tested and marked in accordance with the requirements of GOST or technical specifications; they must be protected from electrolyte exposure by a resistant coating.

4.4.16. The batteries must be insulated from the racks, and the racks from the ground, by means of insulating pads that are resistant to electrolyte and its vapors. Racks for storage batteries with a voltage not exceeding 48 V can be installed without insulating pads.

4.4.17. Aisles for maintenance of batteries should be at least 1 m wide between the batteries if the batteries are located on both sides and 0,8 m if they are one-sided. Batteries should be placed in compliance with the requirements of GOST on racks for stationary installations of electric batteries.

4.4.18. The distance from the batteries to the heaters must be at least 750 mm. This distance can be reduced if heat shields made of non-combustible materials are installed to prevent local heating of the batteries.

4.4.19. The distances between the current-carrying parts of the batteries must be at least 0,8 m at voltages above 65 V to 250 V during normal operation (not charging) and 1 m at voltages above 250 V.

When batteries are installed in two rows without a passage between the rows, the voltage between the current-carrying parts of adjacent batteries of different rows should not exceed 65 V during normal operation (not charging).

Electrical equipment, as well as busbar and cable connections, must be located at least 1 m from leaking batteries and at least 0,3 m below the lowest point of the ceiling.

4.4.20. Battery busbars must be made with bare copper or aluminum busbars or single-core cables with acid-resistant insulation.

Connections and branches of copper busbars and cables must be carried out by welding or soldering, aluminum - only by welding. The connection of the busbars with the lead-through rods of the output plate must be carried out by welding.

The places where the tires and cables are connected to the batteries must be serviced.

Electrical connections from the terminal plate from the battery room to the switching devices and the DC switchboard must be made with single-core cables or bare busbars.

4.4.21. Bare conductors must be double-coated with an acid-resistant, alcohol-free paint along their entire length, except for busbar connections, battery connections and other connections. Unpainted places should be smeared with technical vaseline.

4.4.22. The distance between adjacent bare busbars is determined by the calculation of dynamic resistance. The specified distance, as well as the distance from the busbars to parts of the building and other grounded parts, must be at least 50 mm clear.

4.4.23. Busbars should be laid on insulators and fixed on them with busbar holders.

The span between the busbar support points is determined by the calculation for dynamic resistance (taking into account 4.4.22), but should not exceed 2 m. Insulators, their fittings, busbar fastening parts and supporting structures must be electrically and mechanically resistant against prolonged exposure to electrolyte vapors. Grounding of supporting structures is not required.

4.4.24. The outlet plate from the battery room must be resistant to electrolyte vapors. It is recommended to use slabs of paraffin-impregnated asbestos cement, ebonite, etc. The use of marble slabs, as well as plywood and other materials of a layered structure is not allowed.

When installing slabs in the ceiling, the plane of the slab must rise above it by at least 100 mm.

4.4.25. When choosing and calculating a battery, one should take into account the decrease in its capacity at a temperature in the battery room below +15 ºС.

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

Read and write useful comments on this article.

<< Back

Latest news of science and technology, new electronics:

The world's tallest astronomical observatory opened 04.05.2024

Exploring space and its mysteries is a task that attracts the attention of astronomers from all over the world. In the fresh air of the high mountains, far from city light pollution, the stars and planets reveal their secrets with greater clarity. A new page is opening in the history of astronomy with the opening of the world's highest astronomical observatory - the Atacama Observatory of the University of Tokyo. The Atacama Observatory, located at an altitude of 5640 meters above sea level, opens up new opportunities for astronomers in the study of space. This site has become the highest location for a ground-based telescope, providing researchers with a unique tool for studying infrared waves in the Universe. Although the high altitude location provides clearer skies and less interference from the atmosphere, building an observatory on a high mountain poses enormous difficulties and challenges. However, despite the difficulties, the new observatory opens up broad research prospects for astronomers. ... >>

Controlling objects using air currents 04.05.2024

The development of robotics continues to open up new prospects for us in the field of automation and control of various objects. Recently, Finnish scientists presented an innovative approach to controlling humanoid robots using air currents. This method promises to revolutionize the way objects are manipulated and open new horizons in the field of robotics. The idea of ​​controlling objects using air currents is not new, but until recently, implementing such concepts remained a challenge. Finnish researchers have developed an innovative method that allows robots to manipulate objects using special air jets as "air fingers". The air flow control algorithm, developed by a team of specialists, is based on a thorough study of the movement of objects in the air flow. The air jet control system, carried out using special motors, allows you to direct objects without resorting to physical ... >>

Purebred dogs get sick no more often than purebred dogs 03.05.2024

Caring for the health of our pets is an important aspect of the life of every dog ​​owner. However, there is a common assumption that purebred dogs are more susceptible to diseases compared to mixed dogs. New research led by researchers at the Texas School of Veterinary Medicine and Biomedical Sciences brings new perspective to this question. A study conducted by the Dog Aging Project (DAP) of more than 27 companion dogs found that purebred and mixed dogs were generally equally likely to experience various diseases. Although some breeds may be more susceptible to certain diseases, the overall diagnosis rate is virtually the same between both groups. The Dog Aging Project's chief veterinarian, Dr. Keith Creevy, notes that there are several well-known diseases that are more common in certain breeds of dogs, which supports the notion that purebred dogs are more susceptible to disease. ... >>

Random news from the Archive Super flexible and fire resistant wood 29.01.2022 Chinese scientists have made a breakthrough in the creation of wood composites. They invented a technology that makes wood flexible while protecting it from the effects of fire and fungus.  Chinese researchers took samples of tropical balsa wood up to five millimeters thick. Then they were placed in a special alkaline solution at a certain temperature for 12 hours. After that, the wood samples were filled with a new sample hydrogel. It was he who led to the fact that the material did not get wet, protected from ignition in an open fire and at the same time had excellent flexibility.  According to Chinese scientists, a tree treated in this way can bend at a temperature of minus 50 degrees Celsius. And mold does not appear on it even if you leave such material in a room with a humidity of 90% for two and a half months.

Other interesting news:

▪ Complimentary Telly TV with additional advertising screen

▪ Smartphone Moto X Developer Edition for developers

▪ Artificial biological tissue

▪ Write a letter on your knee

▪ Video camera for animals with built-in feeder

News feed of science and technology, new electronics

Interesting materials of the Free Technical Library:

▪ section of the site Power supply. Article selection

▪ article Marking of domestic diodes. Directory

▪ article Who Invented Sign Language? Detailed answer

▪ Skeleton Coast article. Nature miracle

▪ See Connecting a Remote Control to Your Computer. Encyclopedia of radio electronics and electrical engineering

▪ article Invincible balloon. Focus Secret

Leave your comment on this article:

All languages ​​of this page

Arabic	Hebrew	Polish
Bengali	Hindi	Portuguese
Chinese	Italian	Spanish
English	Japanese	Turkish
French	Korean	Ukrainian
German	Malay	Vietnamese

Home page | Library | Articles | Website map | Site Reviews

www.diagram.com.ua
2000-2024