【 Building materials network 】After the beginning of autumn, the temperature is still high, and the air is dry, which is the frequent season of "dry weather and dry materials, be careful of fire". According to the statistical data released by the Ministry of Fire Protection of the People's Republic of China, among all fire types, electrical fire accounts for 57%, which is a fire type with high zui and higher than the sum of other types of fires.

Every summer and winter is the time of frequent electrical fires. First, because of the heavy wind and rain in summer, overhead lines break, short circuit, pole fall and other accidents, causing fires; The second is electrical equipment installed in the open air (such as Motor , gate Knife switch , electricity lamp The insulation is damaged due to rain and water, and short circuit and fire occur during operation; Third, the high temperature in summer has a great impact on the heating of electrical equipment. Some electrical equipment, such as transformer , motor capacitor , conductor and Connector When the heating temperature rises during operation, it will cause a fire.

An important cause of electrical fire is electrical leakage, that is, the insulation or corrosion of wires due to certain reasons (such as wind, rain, humidity, high temperature, bump, scratch, friction, corrosion, etc.) Bracket The insulation capacity of the material decreases, resulting in the loss of insulation between wires (through damaged insulation, supports, etc.), wires and ground (wires passing through cement The reinforcement and tinplate on the wall) part of the current passes through, which is called leakage. When leakage occurs, the leakage current will generate local high temperature in the way of flowing into the earth. If it meets the parts with high resistance, it will cause the nearby combustibles to catch fire, thus causing fire. In addition, the leakage spark generated at the leakage point will also cause fire.

In addition to some inevitable objective reasons for the occurrence of leakage, the insufficient electrical insulation performance is an important factor for the occurrence of leakage. Common electrical products in the market Insulating material epoxy resin Paint or modified epoxy resin paint and ZS-1091 high temperature insulation coating The performance comparison is shown in the table.

It can be seen from the data in the table that whether epoxy resin Insulating paint It is also a modified epoxy insulating paint, whose performance declines seriously when the temperature rises. For example, the breakdown voltage of epoxy insulating paint is 28kV/mm at room temperature, but only 20kV/mm at 150 ℃, with a drop of up to 9kV/mm. Under the same conditions, ZS-1091 ceramics High temperature insulating paint only drops by 1.4 kV/mm.

In addition, abnormal conditions during the use of electrical equipment will produce instantaneous high temperature, which will cause the aging of organic epoxy insulating paint and even loss of insulation performance. ZS-1091 ceramic high temperature insulating paint is mainly composed of nanometer It is composed of Grade I inorganic substances, and can withstand the impact of 1800 ℃ high temperature, without aging and failure.