Abstract:The small commodity market integrates commodity sales and short-term cargo storage, and has the characteristics of large building scale, large single space span, dense stalls in the market, large flow of personnel, complex business nature, more combustibles and flammables in the business varieties, and large fire load. In addition, the fire safety situation of such small commodity markets is uneven, and it is difficult to implement all fire prevention measures in actual use, resulting in a greater risk of electrical fire in such places. In the event of a fire, it is very easy to cause loss of personnel and property. This paper makes some progress on the role that intelligent safety power distribution devices can play in the distribution lines of the site, which has certain guiding significance for the prevention of electrical fires. Keywords: small commodity market; electrical fires; Intelligent safety power distribution device 0: Overview China is the world's largest small commodity manufacturing and sales country, which provides an industrial foundation for the large-scale development of China's small commodity market. The small commodity market is full of vitality with its rich commodity variety, low circulation cost and high circulation efficiency! In recent years, the scale of China's small commodity market has developed very rapidly, and the transaction volume of China's small commodity market of more than 100 million yuan has reached 10,578100 million yuan, accounting for 23% of the total transaction volume of all 100 million yuan professional market, the small commodity market is the largest market share of transaction volume in all sizes of professional market. In recent years, with the rapid development of the market economy and the continuous improvement of people's living standards, a large number of large-scale small commodity wholesale markets have been built throughout the country, which have attracted a large number of customers with their wide variety of goods, affordable and convenient parking, and have become an important place for people to patronize daily, which has greatly facilitated the daily life of the masses. However, the small commodity market has dense shops, large flow of people, flammable goods, high fire rating, and high fire pressure. Once an electrical fire accident occurs, the loss of life and property caused is immeasurable. 1: Fire hazards in small commodity markets Due to many reasons, the commodity wholesale market generally has many problems such as congenital deficiencies in old buildings, insufficient fire spacing, occupation of fire fighting channels, combustible and flammable materials, concentrated stores, dense personnel, and weak supervision mechanisms. Due to the large number of combustibles in the commodity wholesale market, the large fire load, and the lack of implementation of various fire prevention measures, the fire danger of such places is greater, and serious fire accidents are prone to occur. Fire hazards in wholesale commodity markets 11. The fire rating of the building is poor. In addition to the large-scale market in China's commodity wholesale market, there are also widespread roof markets, street markets, underground markets, etc., these wholesale markets all have low building fire resistance grades, simple and flammable buildings, insufficient fire spacing, lack of fire separation, safety evacuation channels and exit width and other fire safety problems, some even occupy the fire truck passage, residential or public building fire spacing of the street blocking and breaking the illegal market, seriously threaten the fire safety of the surrounding buildings. If there is a fire, it will often cause "fire to the camp". 1.2. There are many combustible items. Most of the goods wholesaled in the wholesale market are combustible goods, such as shoes and hats, clothes, plastic products, stationery, arts and crafts, furniture, etc., all of which are combustible goods. Although some products themselves are made of non-combustible materials, their boxes and boxes are combustible. Other products, such as nail polish, mousse, organic solvents such as gasoline and alcohol in small packets, and butane gas (for lighters) are flammable and explosive chemical dangerous substances. Some markets even operate fireworks, and most of the markets have special warehouses, and the management of commodity storage is chaotic, and the fire hazard is more serious. 1.3. Crowded places. Most of the commodities in the market are mainly indispensable commodities for eating, wearing and using in the lives of the residents, and they are men, women and children rubbing shoulders one after another, and have become the places with the highest density of people and the largest flow in public places in China. Especially during the holiday season, the flow of customers in many markets far exceeds the capacity of the market, and in the event of a fire, evacuation is very difficult. 1.4. Improper use of ignition source and power supply. The shops in the wholesale market, in addition to the daily lighting, summer exhaust and other electricity, the chandeliers, wall lamps, table lamps in the store, the lanterns during the festival or exhibition period, and the electric heating appliances used by the residents to boil water and cook rice, are inseparable from electricity: some market stores also use liquefied petroleum gas stoves in the store: many markets are in front of the shop, and the back is set up as a warehouse. The installation and use of gas appliances are not planned and managed in a unified manner, and are arranged by the operators themselves, which is prone to fire accidents. 1.5. Businesses have weak awareness of fire safety. According to the provisions of the Measures for the Administration of Fire Safety in Bazaars, the fire safety of wholesale markets shall be the responsibility of its organizers, and the administrative authorities for industry and commerce shall provide assistance. However, due to the failure of the organizers to implement the fire safety work, the cooperation and coordination of the relevant departments are not enough, the fire safety management agency has not been established, and the fire safety management system has not been established and improved. As a result, most of the merchants stay in a shallow awareness of fire safety, and generally believe that their stores have always been guarded and will not catch fire; In addition, many merchants do not know the common sense of fire self-rescue and escape, and do not know how to use fire extinguishers. 1.6. Lack of fire-fighting equipment and improper use. Shop operators generally pay attention to immediate interests, often ignore fire safety issues, and do not purchase fire-fighting equipment in accordance with the law. Some operators even feel that the fire extinguisher is placed in the store to occupy space, and they simply put it away, once a fire breaks out, there is no way to play the role of the fire extinguisher, and some operators will not even use the fire extinguisher. 2. The regulations on the safety of electricity distribution and electricity in the small commodity market suggest that the occurrence of electrical fires in the small commodity market is mainly due to human factors, careless use of fire, electrical faults and other reasons, of which electrical fires account for about 20. In order to avoid the occurrence of electrical fires, the following aspects can be managed. 2.1. Frequently check the safety status of circuits, sockets, switches and electrical equipment, and repair problems in time to ensure the safety of electricity. 2.2. It is forbidden to pull or connect electrical lines privately. 2.3. It is forbidden to use and damage electrical facilities such as distribution boxes, switches or lamps in public places, and if there is a loss or accident caused by violating the regulations, in addition to doubling the compensation, the corresponding responsibility shall be investigated; Managers are equally responsible for the consequences of failing to stop these actions. 2.4. When the electrical facilities such as lamps and sockets fail, they should be immediately reported to the maintenance personnel for timely repair, and other personnel shall not disassemble and repair them by themselves, otherwise they shall bear the consequences of the failure, 25. When the maintenance personnel check the maintenance circuit, they must pay attention to the implementation of the operating procedures to ensure the safety of the operation. 2.6. Strengthen the management of electricity consumption, pay attention to saving electricity, and after the market closes every day, only a few necessary channel lighting lamps should be retained, and the rest should be turned off. 2.7. Strengthen the education of electricity safety knowledge and master the correct use of electrical appliances. Three: Ankerui AISD series intelligent safety power distribution device is far from enough to prevent the occurrence of electrical fires by the management system, we must use advanced technology products to prevent the occurrence of electrical fires. The common traditional safety protection means of electricity use in life is to cut off the power supply of the line in time when the arc spark is caused by a short circuit in the circuit, but at this time the arc spark has been generated, and if there are flammable materials such as paper and carpet around, a fire will be difficult to avoid. At the same time, the system monitors key data such as voltage, current, power, temperature, residual (leakage) current, and insulation resistance to the ground in the electrical circuit in real time, intelligently identifies the abnormal risk of the circuit, and transmits the alarm information to the cloud management system in time. Remind users to conduct accurate troubleshooting in a timely manner. The system can not only meet the remote emergency treatment of management personnel in emergency situations, but also output historical fault types, alarm data, maintenance records and other management ledgers, and support the daily safe electricity optimization management of user units, so as to effectively improve the detection rate and treatment rate of electrical safety hazards and prevent the occurrence of electrical fires! 3.1 Introduction
AISD series intelligent safety power distribution device is an intelligent and safe power product specially developed for the low-voltage distribution side, this product is mainly designed for low-voltage power distribution side personal electric shock safety accidents, line aging, electrical fires caused by leakage and other common hidden dangers. The products are mainly used in temples, schools, hospitals, nursing homes, ** centers, hotels, shopping malls, enterprises and institutions, household appliances and other low-voltage electricity occasions. 3.2. Functional characteristics Adopt integrated machine design, special user wiring and operation window, simplify user use. Improve continuity of power supply. When a single-phase grounding fault occurs in the power grid on the load side of the device, the power grid can continue to supply power, and the device will give an alarm, but the power supply will not be cut off, and the continued operation of the electrical equipment will not be affected. Increased security of power supply. When a single-phase grounding fault occurs in the load line on the output side of the device, no sparks will be generated at the grounding point to prevent electrical fire accidents. Ensuring personal safety. The device limits the leakage current of the load-side power grid, and when the human body accidentally touches a single power supply line, it can protect the human body and will not cause electric shock accidents. Monitoring and alarm function. When the back-end output line is overloaded, over-under-voltage, insulation, and over-temperature fault inside the device, the device emits an audible and visual alarm signal. Measurement and display of electrical parameters. The device can measure the current, voltage, power, electric energy, device temperature and insulation resistance value of the output line to the ground in real time, and display it in real time on the touch screen. Event logging. The device can store 20 event records, which can be queried by the user. Communication features. The device is equipped with 1 RS485 communication channel and adopts the standard Modbus-RTU protocol. It can also be equipped with wireless communication function, which can send data to the cloud platform through wired networking or wireless mode, and users can use browsers, mobile apps or WeChat accounts to remotely monitor and control the device. It has the functions of emergency mains switching, surge protection and emergency button power-off. 3.3. Technical indicators
3.4. Typical application diagram of temple architecture
AISD series intelligent safety power distribution device can be connected to the electrical fire monitoring host through wired communication, and can also be connected to the safe power management cloud platform or other cloud platforms through wireless communication, which is convenient for management personnel to maintain and manage all places where intelligent safety power distribution devices are installed. Precautions 1) When selecting an intelligent safety power distribution device, the rated capacity of the device should be consistent with the rated capacity of the rear electrical equipment. For example, when the rated capacity of the intelligent safety power distribution device is 3kva, the rated capacity of the rear electrical equipment should not exceed 3kva, and it is strictly forbidden to use it in the distribution line where the rated capacity does not match. 2) The intelligent safety power distribution device is installed on the floor, and the installation site should be ensured that there is no dripping, corrosive chemical gas and precipitated substances, and pay attention to the ambient temperature and ventilation and heat dissipation. 3) When wiring, it should be operated according to the wiring diagram, and at the same time, in order to prevent local overheating caused by excessive contact resistance at the joint, and also to avoid abnormal operation of the device due to poor contact, it should be ensured that the wiring of the corresponding terminal of the device is tightened and compacted. 4) It is strictly forbidden for non-professionals to open the product shell without authorization. ConclusionThe small commodity market provides consumers with a wealth of popular goods, which can bring consumers preferential and fast consumption experience, and is a good place for citizens to experience leisure. The electrical safety of the place must be paid attention to, and the electrical design in the area must be designed in strict accordance with the relevant specifications, so as to prevent the occurrence of electrical accidents caused by electric shock and fire from the source.