Unlock instant, AI-driven research and patent intelligence for your innovation.

Leakage protection method and system for electric cabinet

A leakage protection and electric cabinet technology, applied in the field of electric cabinets, can solve problems such as the inability to cut in auxiliary grounding and the imperfect judgment of when auxiliary grounding should be cut in, so as to achieve the effect of avoiding electric leakage.

Active Publication Date: 2021-03-26
樊嵩
View PDF11 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The existing electrical cabinets are not perfect in judging when the auxiliary grounding is cut in, so it is impossible to effectively cut in the auxiliary grounding

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Leakage protection method and system for electric cabinet

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Embodiment 1, reference figure 1 , a leakage protection method for an electric cabinet, characterized in that it comprises:

[0017] Step S100, acquiring the change amount of the leakage current within the first time period to obtain the first change amount.

[0018] Step S200, outputting a first alarm signal when the first change amount is greater than or equal to 15 mA.

[0019] Step S300, when within the second time period, the number of occurrences of the first alarm signal is greater than or equal to 10 times, establish a diversion channel between the cabinet body of the electric cabinet and the ground.

[0020] Wherein, the leakage current is the current between the cabinet body of the electric cabinet and the ground, the first time period is 0.02s, and the second time period is 1s.

[0021] Specifically, because the leakage current has a sudden change, that is, the current amount of the leakage current suddenly increases in a short time. Therefore, by detectin...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a leakage protection method and system for electric cabinets. The method includes obtaining the variable quantity of leakage current in a first time period so that first variable quantity can be obtained; outputting a first alarm signal when the first variable quantity is greater than or equal to 15 mA; and establishing a diversion channel between a cabinet body of an electric cabinet and the ground during a second time period when the appearance frequency of the first alarm signal is greater than or equal to 10, wherein the leakage current is the current between the cabinet body of the electric cabinet and the ground, the first time period is 0.02 s, and the second time period is 1 s. The system includes a first variable quantity obtaining module, a first contrastmodule, a first statistic module, a clock period module and a diversion channel establishing module. Through the judgement of abrupt situations, the diversion channel can be established when the leakage current is abruptly changed, so that the leakage current can be guided away, and danger of electric leakage can be avoided; and the method and system can be used for the technical field of electriccabinets.

Description

technical field [0001] The invention relates to the technical field of electric cabinets, in particular to a leakage protection method and system for electric cabinets. Background technique [0002] In the electric cabinet of the existing three-phase five-wire electrical system, various leakage currents will occur. When the leakage occurs, it is necessary to guide the leakage current from the electric cabinet to the earth in time, so as to avoid electric shock accidents. The existing leakage detection method is generally passive, that is, when a building electricity occurs in the electric cabinet, the leakage current is introduced into the earth by setting a ground terminal on the electric cabinet. This passive leakage protection structure is simple, but not reliable. Since the ground terminal is prone to aging, it is necessary to start a bypass for auxiliary grounding. However, if the auxiliary ground connects the electric cabinet to the earth for a long time, it will not...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H02H9/02
Inventor 樊嵩
Owner 樊嵩