Electrical fire fault simulation and trace preparation device set

Abstract

The invention discloses an electrical fire fault simulation and trace preparation device set. The set comprises a voltage adjusting cabinet, a control cabinet and a firing chamber, an electrical circuit and common electrical faults of short circuit, overcurrent, local overheating, an undervoltage condition and the like can be simulated, corresponding material evidences with fire marks are prepared, mutual conversion among the faults can be achieved, and real faults reappear; high-speed measuring for voltage and current can be achieved, and the depth of research is expanded; the modularized numerical control operation can be achieved, and using is convenient; stepless adjustment for voltage and current can be achieved, and a simulation method is optimized; the firing scene can be flexibly arranged and is close to actual fire; multi-level multiple protection can be achieved, and operation safety is ensured.

Description

technical field [0001] The invention relates to the field of electrical fire investigation, in particular to a set of electrical fire fault simulation and trace preparation devices. Background technique [0002] Electrical fire is the most common fire accident, accounting for about one-third of the total number of fires in my country. The investigation results of this type of fire are also one of the focuses of social attention, directly related to the vital interests of the affected people. Electrical fires are divided into two categories: one is the short circuit, overcurrent, leakage, poor contact and other faults in the electrical circuit, which ignite the surrounding combustibles and cause a fire; the other is the failure of electrical equipment for some reason, resulting in local high temperature Or a fire caused by a line fault, such as: the hair dryer resistance heat increases sharply, igniting the surrounding combustibles, and causing a fire. According to the stati...

AI Technical Summary

Problems solved by technology

[0005] (1) Only a single fault can be simulated, and the mutual conversion between faults cannot be realized. For example, overcurrent fault occurs in the wire, insulation failure due to heating of the wire core, and short circuit fault are induced. This is more common in actual electrical fires, but the equipment could not be simulated before;

[0006] (2) It can only simulate line faults, and cannot simulate equipment and contact faults conveniently. For example, when a wall plug-in board with a rated current of 10A is connected to a large current of 20A, local contact heating faults will occur. Existing equipment cannot Fast installation and repeated simulation;

[0007] (3) Many low-voltage fault simulations are used, which cannot simulate actual under-overvoltage faults. For example, under-overvoltage faults of electrical appliances mainly depend on the type of fault in the power distribution system. The input voltage of the analog equipment needs to be continuously adjustable, and many existing equipment It is a low-voltage high-current device, which is far from the actual situation of fire;

[0008] (4) Only the heating phenomenon can be observed, and the data cannot be measured and recorded in real time. For example, the device for simulating a short-circuit fault, even if the external voltage and ammeter is connected, cannot capture the voltage and current changes at the moment of the short circuit, resulting in in-depth research;

[0009] (5) It can only be controlled by manual operation, and digital modular control cannot be realized, so there are certain potential safety hazards;

[0010] (6) Most of them can only simulate a single fire source, and large-scale combustion cannot be carried out. For example, most devices are limited by the space of the combustion chamber, and it is impossible to arrange large loads of combustibles. Most of the fire sources are fixed fires such as liquefied petroleum gas furnaces. source, the electrical appliances and combustibles cannot be arranged flexibly inside

Images