Application of electrical fire current limiting protectors in staff dormitories and rental rooms

Ren Yunye (Accuray Electric Co.
, Ltd.
, Shanghai, Jiading 201801) Abstract: With the development of urbanization, China's high-rise civil buildings continue to spring up in the city, and the fire problem of high-rise buildings is prominent
.
In the event of a fire accident in a high-rise building, rescue efforts will be difficult, so the fire protection design of high-rise buildings is crucial
.
When the line short-circuit fault, the electrical fireproof current limiting protector can quickly limit the short-circuit current at a microsecond speed to achieve arc extinguishing protection, which can reduce electrical fire accidents and ensure the safety of
personnel and property in the use place.
Keywords: high-rise buildings; electrical fires; electrical fire protection; short-circuit protection; Current limiting protection; Arc extinguishing protection; Grounding protection0 Industry backgroundWith the development of urbanization, China's high-rise civil buildings continue to spring up in the city, and the fire problem of high-rise buildings is prominent
.
Especially since the beginning of the 21st century, the architectural shape and structural form of some high-rise buildings have become more complex, and the
electrical equipment and electrical devices used in buildings have also increased 。 High-rise buildings have a large building area (tens of thousands to hundreds of thousands of square meters), air conditioning and other electrical equipment, many and complex electrical lines, large electricity consumption (10~35W/m2 for high-rise residences in China, 70~80W/m2 for foreign tourist hotels, 100~140W/m2 for high-end hotels), a large number of elevators (there are fire elevators and evacuation elevators), the need for water pumps and firefighting water equipment (because of the water pressure relationship, most of them have water pump stations on the middle floor), and electronic technology applications.
The property value in the building is high, and the reliability
of power supply is required.
According to statistics, electrical fires are the main cause of
high-rise building fires.
Among electrical fires, fires caused by short circuits (including ground fault short circuits), overload, poor contact and other reasons account for a large
proportion.
Therefore, paying attention to the safe use of electricity, especially eliminating the fire hazard of electrical lines, is of great significance
to ensure the safety of high-rise buildings.
This article takes the practical application case of a hotel in Shanghai to introduce the application
of electrical fire limiting protector in high-rise buildings and hotel industry.
1 Project Introduction The project is an electrical safety project
of a hotel building in Shanghai.
In order to ensure the electrical safety of the hotel and prevent electrical fires caused by wire short circuits, wire overloads, etc.
, electrical fire limiting protectors
are installed in the common load end circuits.
2 Product introduction Electrical fireproof current limiting protector can overcome the disadvantages of large short-circuit current existing in traditional circuit breakers, air switches and monitoring equipment, long time to cut off short-circuit current, large arc sparks generated during short circuits, and short service life, when short-circuit faults occur, it can quickly limit the short-circuit current at microsecond speed to achieve arc extinguishing protection, so as to significantly reduce electrical fire accidents and ensure the safety of
personnel and property in the use place.
This time the ASCP200-1 electrical fire current limiting protector is used, the protector is a single-phase current limiting protector, and the large rated current is 63A
.
It can be widely used in schools, hospitals, shopping malls, hotels, entertainment venues, temples, cultural relics buildings, exhibitions, residences, warehouses, kindergartens, elderly buildings, collective dormitories, electric vehicle charging stations and rental shopping malls shops, wholesale markets, bazaars, A-B-C dangerous goods warehouses and other power places at the end of trunk and branch road line protection
.
This project is installed at the entrance switch of the residence, which can ensure the safety
of electricity at the end of the residence.
3 Function introductionThe product has short circuit protection, overload protection, over-temperature protection in the meter, over-under voltage protection, temperature monitoring of distribution cables, leakage current monitoring functions, communication and other functions
.
Short-circuit protection function
.
The protector monitors the current of the power line in real time, and when the line has a short circuit fault, it can achieve fast current limit protection within 150 microseconds, and send out an audible and visual alarm signal
.
Overload protection function
.
When the current of the protected line is overloaded and the overload duration exceeds the action time (3~60 seconds can be set), the protector starts the current limiting protection and sends out an audible and visual alarm signal
.
Over-temperature protection function
in the table.
When the operating temperature of the internal components of the protector is too high, the protector implements over-temperature current limit protection and sends out an audible and visual alarm signal
.
Over- and under-voltage protection function
.
When the protector detects that the line voltage is undervoltage or overvoltage, the protector sends out an audible and visual alarm signal, and the current limit protection
can be set in advance.
Distribution cable temperature monitoring function
.
When the temperature of the monitored cable exceeds the alarm set value, the protector sends out an audible and visual alarm signal, and the current limit protection
can be set in advance.
Leakage current monitoring function
.
When the leakage of the monitored line exceeds the alarm set value, the protector sends out an audible and visual alarm signal, and whether to start the current limit protection
can be set in advance.
Communication function
.
The protector has 1 RS485 interface and 1 2G wireless communication, which can send data to the background monitoring system to achieve remote monitoring
.
The monitoring background can be Accrel-6000/B electrical fire monitoring host, Acrel-6000 safe power management cloud platform, or third-party monitoring software or platform
。 4 Technical parameters ASCP200 electrical fire current limiting protector technical parameters 5 ConclusionThe use of electrical fire limiting protector can reduce the occurrence of electrical fire caused by excessive electric sparks caused by wire short circuit, wire overload, etc.
, when the wire is overloaded or short-circuited, disconnect the rear load circuit in time, stifle the generation of electric sparks in the cradle, will not produce wire overheating insulation melting and short circuit point burst power sparks, so that it can not ignite the surrounding flammables, reduce the occurrence of fire, Protect the life and property of
residential users.
References[1] Accuray Enterprise Microgrid Design and Application Manual.
2019.
11 Edition[2] Accuray Safety Power Management Cloud Platform.
2020.
04 Edition[4] LIN Manya.
Fire protection analysis of electrical wiring in high-rise buildings[J].
Electromechanical Safety, 2017:13-14.
[5] Song Shibin.
Analysis on the problem of electrical fire protection design of high-rise buildings[J].
Science and Technology and Enterprise, 2012(9):230-230.
About author:Ren Yunye, male, currently works at Accuray Electric Co.
, Ltd.
, the main research direction is the field of
low-voltage power distribution safety.