The detection of mechanical vibration defects is one of the effective means to ensure safe operation of GIS equipment. However

there is still lack of systematic research on the vibration of mechanical defects for various components of GIS equipment. In this paper

one highly sensitive detection device for the vibration state of GIS equipment is developed

a high-voltage and high-current test platform for mechanical defects of GIS equipment

which simulates 5 kinds of typical defects

is set up

and study on the vibration signal characteristics test of GIS equipment is performed. The test results show that in case the load current remains unchanged

the vibration signal hardly changes with the variation of voltage. Under the action of same voltage

the vibration signal waveform remains basically unchanged

and the amplitude of the vibration signal increases with the increase of the load current. While

in the case of mechanical defects

the main frequency spectrum of the vibration signal is 100 Hz

with more high frequency components superimposed

and vibration signals of different defects show different frequency and amplitude characteristics. The frequency band energy characteristic analysis method based on Fourier analysis is adopted to construct vibration feature fingerprint database for typical defects. The results in this paper can be used for mechanical defect detection and type identification of GIS equipment as well as the guidance of maintenance work on site.