Main circuit for large-power electric fire experiment

Abstract

The invention discloses a main circuit for a large-power electric fire experiment. The main circuit is formed through the connection in turns between an incoming bus circuit, a power switching circuit, a load switching circuit and an outgoing distribution circuit, wherein the incoming bus circuit is composed of two incoming branches and one outgoing branch, so as to realize an incoming bus function, and protect overcurrent, default phase and the like; the power switching circuit can realize the selection and switch among a three-phase alternating current power supply and a three-input single-output programmable (or frequency) power supply, and a three-input single-output DC power supply; the load switching circuit realizes the functions of loading, unloading and connection of series and parallel for an experimental load; the outgoing distribution circuit realizes the outgoing distribution of a sample preparation device and the function of providing overcurrent protection. The main circuit has the advantages of large power, various working conditions, accurate measurement and control, safe and convenient control operation, and can be applied to a large-scale electric fire experiment system.

Description

technical field [0001] The invention relates to the technical field of electrical fire experiment systems, in particular to a main circuit for high-power electrical fire experiments. Background technique [0002] Fire has the highest frequency of occurrence among various disasters, is highly destructive, and causes the greatest social impact. According to the 2015 China Fire Protection Yearbook, there were 395,000 reported fires nationwide in 2014, with 1,815 deaths and a direct economic loss of 4.7 billion yuan. Electrical fires accounted for 30%, and they were the main category of major fires. From 2009 to 2015, the number of physical evidence identification cases entrusted by a physical evidence identification institute in Guangdong Province increased from 63 to 225. This shows that on the one hand, there is a rigid demand for electrical fire evidence identification technology in fire investigations. The situation is becoming more and more complicated, and the support of...

AI Technical Summary

Problems solved by technology

At present, the above four types of devices and cabinets mainly focus on the initial realization of the control of environmental parameters, while the control of parameters that affect the characteristics of the melting mark such as electrical parameters and contact methods lacks precision, and has not been built into high-power and diverse working conditions. , precise measurement and control, safe and convenient integrated large-scale electrical fire experiment system

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