Most Huoke Rong IOT is alert to the culprit behind

Kerong IOT: be alert to the "culprit" behind electrical fires

in recent years, electrical fires have occurred frequently in China, causing heavy casualties and property losses. According to the comprehensive statistics of Anhui Kerong IOT Technology Co., Ltd., fires caused by electrical reasons account for about 40% of all fires, and have been on the rise in recent years, so electrical fires can not be ignored. From 2011 to 2016, a total of 524000 electrical fires occurred in China, causing 3261 deaths and 2063 injuries, with direct economic losses of more than 9.2 billion yuan, accounting for more than 30% of the total fire and casualty losses in the country; Among them, there were 17 major electrical fires, accounting for 70% of the total number of major fires

in order to effectively curb the high incidence of electrical fires and ensure the safety of people's lives and property, with the consent of leading comrades of the State Council, the safety committee of the State Council decided to organize and carry out a three-year comprehensive treatment of electrical fires nationwide

what is an electrical fire

electrical fire generally refers to the thermal energy released due to the failure of electrical lines, free long-distance electrical equipment, appliances and power supply and distribution equipment using automatic calculation springs; Such as high temperature, arc, electric spark and non fault released energy; For example, the hot surface of electric heating appliances ignites the body or other combustibles under the conditions of combustion, and the plastic film blowing machine machinery manufacturing industry uses high-tech disasters, including fires caused by lightning and static electricity

what are the causes of electrical fire

1. The electrical circuit has a long service life, the end edge is aging, the copper aluminum conductor is poorly connected, the normal maintenance is lacking, and there is electric leakage and ignition, which leads to the heat passing through the line, burns out the end edge, and causes a fire

2. When the wire is short circuited, the current can be increased to several times or more than dozens of times of the normal time, and the heat generated is proportional to the square of the current, and the wire temperature rises sharply. When the temperature of the edge layer exceeds 250 ℃, the line will catch fire. This situation is proportional to the length of the short circuit wire

3. When the fuse of the electrical switch is fused, the molten bead and the spark generated when the switch is turned on and off fall on the combustible below, which may cause a fire

4. When electric appliances and lighting fixtures are working near inflammables or forget to cut off the power supply after use, if they are placed on the ignition base or the waste heat is not dissipated after use, they will be immediately packed into combustible packages, which will cause a fire

5. When carrying out electric welding, do not take safety measures to make the welding arc burn combustibles or make sparks and slag fall on combustibles and cause a fire

6. Overload operation of electrical equipment and seizure of rotating parts of mechanical equipment, resulting in excessive torque, will lead to overheating of the equipment

7. If the power supply voltage is higher or lower than 15% of the rated voltage, the line current will increase and even dangerous temperature will appear

8. When the circuit breaker and controller are operated under abnormal conditions, the strong arc is very easy to burn the operators or cause a fire. The residual oil of oil circuit breaker, power transformer and other equipment will be gasified and decomposed under the action of high-temperature arc, and combustion or explosion will occur

how to prevent electrical fire

as a professional service provider of electrical fire monitoring system, Anhui Kerong IOT Technology Co., Ltd. reminds you:

1. Improve short-circuit protection and overload protection, and install circuit breakers and leakage protectors

2. The line laying is standard, the connection is reliable, and the wire diameter meets the use requirements

3. The electrical equipment is intact, the equipment is reliably connected with the power supply, and the electrical equipment is not overloaded

4. Install and use qualified electrical components and equipment

5. Regularly check the insulation performance, functions of electrical components and equipment conditions, especially the reliability of short-circuit protection and overload protection

how to put out the electrical fire

as a professional service provider of electrical fire monitoring system, Anhui Kerong IOT Technology Co., Ltd. reminds you that from the perspective of fire fighting, electrical fire has two characteristics: first, electrical equipment is on fire or does not disconnect from the power supply after causing the fire, but is still charged; Second, some electrical equipment (such as power transformers, circuit breakers, motor starting devices, etc.) are filled with oil. In case of fire, fuel injection or even explosion may occur, causing the spread of fire and expanding the scope of fire. Therefore, the electrical fire extinguishing must be based on its characteristics. 7. If your metallographic microscope has the function of a centralized condenser, take appropriate measures

1. Cut off the power supply

when there is an electrical fire, if the power has not been cut off on site, first of all, find a way to cut off the power supply, which is an important measure to prevent expanding the scope of the fire and avoiding electric shock accidents. The following points should be paid attention to when cutting off the power supply:

1) reliable insulating tools must be used to cut off the power supply to prevent electric shock accidents during operation:

2) the location of cutting off the power supply should be appropriate to avoid affecting the fire extinguishing work

3) when cutting wires, wires of different phases should be cut at different parts to avoid short circuit

4) if the conductor is loaded, remove the load as much as possible before cutting off the power supply

2. Prevent electric shock avoid potential fire hazards caused by electric traces

in order to prevent electric shock accidents during fire extinguishing, pay attention to maintaining a necessary safety distance from the charged body when extinguishing with electricity. Do not use water (as shown in the figure) or foam fire extinguishers to extinguish the fire. Dry yellow sand, carbon dioxide and dry powder fire extinguishers should be used to extinguish the fire. Prevent the body, hands, feet, or used fire extinguishers from directly contacting or too close to the electrified part, resulting in electric shock accidents. Insulating rubber gloves should also be worn when extinguishing fire with electricity

3. Fire extinguishing of oil filled equipment

when extinguishing the internal fire of oil filled equipment, the following points should be paid attention to:

1) when the external fire of oil filled equipment is on fire, carbon dioxide, 1211, dry powder and other fire extinguishers can be used to extinguish the fire; If the fire is serious, cut off the power supply immediately and put out the fire with water

2) if there is a fire inside the oil filling equipment, the power supply should be cut off immediately. The spray water gun is used to extinguish the fire, and sand and soil can be used to extinguish the fire if necessary. The leaked oil fire can be extinguished with a foam extinguisher

3) when the generator, motor and other rotating motors are on fire, in order to prevent the shaft and bearing from deformation, they can be rotated slowly, and the spray water gun can be used to extinguish the fire and help them cool down. Carbon dioxide, 1211 and steam can also be used to extinguish the fire