Self-checking power distribution cabinet

Abstract

The invention discloses a self-checking power distribution cabinet, and solves problems that whether an ion grounding electrode connected with a power distribution cabinet is intact or not cannot be known and the ionization capacity of the ion grounding electrode cannot be improved. According to the technical scheme, the output end of an electric leakage analog circuit is connected with the ion grounding electrode to output analog current; a detection and comparison circuit is used for detecting voltage between the output end of the electric leakage analog circuit and the ion grounding electrode; a control circuit is coupled with the detection and comparison circuit to receive a detection signal and to output the control signal; a warning circuit is coupled with the control circuit to receive a control signal, and to respond the control signal to realize warning; a compensation circuit is coupled with the control circuit, and is controlled by the control circuit to heat the ion grounding electrode. According to the self-checking power distribution cabinet, the ion grounding electrode is detected through real-time detection, if the ion grounding electrode is damaged, an operator is reminded of maintenance through warning; meanwhile, the ionization efficiency of the ion grounding electrode is improved through the compensation circuit.

Description

technical field [0001] The present invention relates to a power supply equipment, more specifically, it relates to a self-inspection power distribution cabinet. Background technique [0002] Power distribution cabinets are divided into power distribution cabinets, lighting distribution cabinets, and metering cabinets. They are the final equipment of the power distribution system. Power distribution cabinets are collectively referred to as motor control centers. ; The motor control center is used in occasions where the load is concentrated and there are many circuits. They distribute the electric energy of a certain circuit of the upper-level power distribution equipment to the nearby load. This level of equipment should provide protection, monitoring and control for the load. If the power distribution cabinet If a fault occurs, it will have a great impact on the entire power distribution system. Therefore, once the power distribution cabinet fails, it needs to be repaired as...

AI Technical Summary

Problems solved by technology

Therefore, in the whole system of the grounding device, the filler is very important, and the filler will be used up in long-term use, or the filler will be destroyed due to improper use, or the texture of the external soil cannot be used. Let the filler achieve a good effect, resulting in poor ionization effect, so there are certain hidden dangers in using the ion ground electrode to ground the power distribution cabinet. If the ion ground electrode is damaged or there is a problem, the resistance of the grounding resistance will increase. As a result, leakage current flows through the grounding resistance on the shell of the power distribution cabinet, generating a voltage greater than the safe voltage and causing damage to maintenance personnel or other operators. Therefore, damage to the ion grounding electrode will cause personal safety problems, and None of the currently used power distribution cabinets can achieve the function of improving the ionization effect of the ion ground electrode and reducing the ground resistance

[0005] Usually, after the installation of the ion ground electrode is completed, the installer will inspect it, and this inspection will only be carried out again after the installation is completed, and there will be no real-time inspection after that, so it is impossible to know whether there is a problem with the ion ground electrode during use. As an important part of the power supply system, the power distribution cabinet needs to ensure the safety of its personnel no matter in the maintenance or installation process, so the ion ground electrode connected to the power distribution cabinet must be intact, and the current distribution cabinet is not There is no detection device for the detection of the ion ground electrode, so it is impossible to detect whether the ion ground electrode is damaged in real time. Once damaged, it will cause unnecessary danger in the process of repairing the power distribution cabinet. Therefore, the current The power distribution cabinet used has a certain room for improvement

Images