Arc light monitoring and early warning device of power distribution cabinet and monitoring and early warning method thereof

Abstract

The invention relates to an arc light monitoring and early warning device in a power distribution cabinet and a monitoring and early warning method thereof. A voltage and each branch current transformer measurement module, each branch arc sensor measurement module, and each branch intelligent fire extinguishing method are installed in the power distribution cabinet. The material integrates the patch fire protection module, and is equipped with a CPU comprehensive analysis module, an early warning judgment module, a fire protection output module, and a remote background display operation module to monitor, calculate, and determine the voltage, current of each branch, and arc intensity of each branch in real time. According to the real-time monitoring value and variation of arc intensity, the arc intensity is estimated and calculated, and the secondary value judgment and early warning are carried out. The method of determining and starting the linked arc fire module ensures that the fire module can be started point-to-point in time when arc light occurs, eliminating hidden dangers and enabling good branches to continue to operate.

Description

technical field [0001] The invention relates to the technical field of safety monitoring of power equipment, in particular to an arc light monitoring and early warning device in a power distribution cabinet, which can start a fire-fighting module point-to-point in time when arc light occurs, eliminate hidden dangers, and enable good branches to continue to operate. method of early warning. Background technique [0002] At present, for the arc light monitoring and protection device of the power distribution cabinet, several arc light intensity sensors are generally installed in the power distribution cabinet to check whether there is arc light in the power distribution cabinet. Whether the total incoming line current exceeds the value for trip protection, when both meet the conditions, the main incoming line circuit breaker will be tripped, and the entire power distribution cabinet will lose power. This kind of monitoring does not consider the development process of arc ligh...

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Problems solved by technology

This kind of monitoring does not consider the development process of the arc, it is only based on the instantaneous value, and the current must exceed the fixed value during linkage. , or due to the arcing of the ground current, the arc fault caused by the failure of the criteria to be satisfied at the same time expands. Even if the diagnosis is made in time and the incoming circuit breaker is tripped, the entire power distribution cabinet will be de-energized and the redundant operation will be cut off. Good branch circuit, and even if the arc fault occurs, even if the protection action is only to trip the incoming circuit breaker and cut off the operating current, such as arc burning, it is still impossible to carry out fire protection measures in time

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