KR970066601A - Electrical equipment fault diagnosis device - Google Patents

Abstract

The present invention relates to a fault diagnosis apparatus for an electric facility that detects an abnormality in an electric facility, and more particularly to a fault diagnosis apparatus for monitoring an electric power supplied to an electric facility such as a switch, a breaker or the like to prevent a disaster caused by aged deterioration . In the present invention, a failure type is constructed for each electric equipment as a database, and then it is checked whether the electric equipment is faulty or not according to the power state of the electric equipment at present, so that the electric equipment can be checked for failure.

Description

Electrical equipment fault diagnosis device

Since this is a trivial issue, I did not include the contents of the text.

FIG. 1 is a block diagram of an electrical equipment failure diagnosis apparatus according to the present invention. FIG.

Claims (9)

A fault diagnosis apparatus for an electric facility for detecting an abnormality in an electric facility interposed between a power source and a load, the fault diagnosis apparatus comprising: a sensor for receiving a predetermined sensing signal from a sensor for sensing a power state supplied to the electric equipment; A sensor input unit for extracting and digitally converting a harmonic component of the frequency component and outputting the frequency function component as frequency variable data and the time function component as time variable data; Frequency variable data and time variable data for a harmonic component of a detection signal in the event of a failure of the electrical equipment are informed according to the type of the electric equipment according to the type and constructed as a database and the frequency variable data and the time variable data A failure determination unit for comparing the frequency variable data of the database with the time variable data for each of the variable data to determine whether the electrical equipment is faulty; And a monitoring computer having a predetermined program for monitoring the presence or absence of a failure of the electrical equipment and receiving fault information of the electrical equipment through an interface process with the fault determining unit on the program and displaying the fault information on the rotating surface Wherein said fault diagnosis apparatus comprises: The apparatus of claim 1, wherein the sensor input unit receives a detection signal of a power supply voltage of the electrical equipment from a sensor that detects a power supply voltage of the electrical equipment. The apparatus according to claim 1, wherein the sensor input unit receives a detection signal of a power supply current of the electrical equipment from a sensor that senses a power supply current of the electrical equipment. The sensor input unit according to claim 1, wherein the sensor input unit comprises: an amplifier having a predetermined amplification factor for extracting and digitally converting a harmonic component of a predetermined order from a predetermined sensing signal; a band filter for extracting a harmonic component; And an A / D converter for digitally converting the electric power of the electric equipment. The apparatus according to claim 1, wherein the sensor input unit analyzes a harmonic component as a frequency function component and a time function component on a frequency spectrum. 2. The electric power supply system according to claim 1, wherein the failure determination unit searches the frequency variable data or the time variable data individually on the basis of any one in the database or searches for both variable data to find the failure type of the electric equipment. Equipment fault diagnosis device. The apparatus according to claim 1, wherein the failure determination unit uses a processor dedicated to digital signal processing having an internal memory. The apparatus according to claim 1, wherein the failure determination unit classifies a failure type for each electrical equipment and constructs a database. The apparatus according to claim 1, wherein the failure determination unit searches the frequency variable data based on the size of the frequency variable data, and searches for the time variable data based on the change trend. ※ Note: It is disclosed by the contents of the first application.