In modern building electrical systems, fire-resistant bus duct plays a vital role. Its reliability in different fire scenarios is directly related to the safety and stability of the entire power supply.
First of all, the simulation of fire scenarios is the basis of reliability testing. Common fire scenarios include fires caused by ordinary flammable materials, such as flames produced by burning wood and paper, which develop relatively slowly and have a relatively stable temperature rise rate. There are also high-energy fires caused by electrical faults. The flame temperature of such fires is extremely high and may be accompanied by violent phenomena such as explosions, which will instantly produce strong thermal shocks and pressure waves. For different fire scenarios, a special test environment needs to be constructed, such as a fire test furnace that simulates different combustion sources.
During the test process, temperature monitoring of fire-resistant bus duct is a key link. When a fire occurs, high-precision temperature sensors arranged in different parts of the bus duct are used to record its temperature change curve in real time. For ordinary fire scenarios, observe the temperature rise of the internal conductor of the bus duct during long-term heating to see whether the conductor insulation performance can be maintained within the specified time to prevent short-circuit failures. For example, in a wood fire simulation test, if the fire-resistant bus duct can maintain the internal temperature below the insulation damage threshold for several hours, it means that it has a certain reliability in such scenarios.
In high-energy electrical fire scenarios, the focus is on the heat shock resistance of the bus duct. When encountering instantaneous high temperatures, the shell material, insulation layer and internal structure of the bus duct are put to the test. Test whether it will deform or crack due to rapid temperature changes, causing the internal conductor to be exposed or lose protection, thereby causing power outages or safety accidents.
The smoke environment is also a factor that cannot be ignored. The large amount of smoke generated by the fire may contain corrosive substances, which will corrode the metal parts and insulation materials of the bus duct. By injecting simulated smoke into the test environment, observing the performance changes of the bus duct under the cover of smoke, such as the degree of corrosion of the shell and the decrease in insulation resistance, etc., evaluate its long-term reliability in the smoke environment.
In addition, the water flow impact in the fire scene must also be included in the test scope. During the fire fighting process, water may be sprayed directly on the bus duct. At this time, the waterproof performance of the bus duct and the impact of steam generated after water contacts with high-temperature components on its operation are tested. For example, observe whether the bus duct will short-circuit due to water ingress, or whether the internal pressure is abnormal due to steam accumulation.
After the test, the performance of the fire-resistant bus duct is comprehensively evaluated and analyzed. According to the test data under different fire scenarios, it is judged whether it meets the corresponding fire resistance standards and safety specifications. If there are deficiencies, the reasons are analyzed in depth, such as improper material selection, structural design defects, etc., to provide a basis for subsequent product improvement and optimization.
Through the reliability testing and analysis of fire-resistant bus duct in various fire scenarios, its performance characteristics can be fully understood, providing strong guarantees for its safe application in different building environments and power systems, and promoting the continuous development and improvement of fire-resistant bus duct technology.
