Patent ID: 8488284

Claim:
A transformer failure analysis system adapted for monitoring an input current and voltage of a transformer, comprising: a controller, said controller comprising a trigger circuit and a current-conduction switch, said trigger circuit being adapted for providing a DC signal to said current-conduction switch to turn on said current-conduction switch, said current-conduction switch being electrically connected to an AC power source and adapted for transmitting an AC signal to a primary winding of said transformer when turned on; a sensing device electrically connected with said current-conduction switch and the primary winding of said transformer and adapted for sensing a current and voltage of the primary winding of said transformer and correspondingly outputting a current signal; a phase detector electrically connected with said AC power source and adapted for detecting a variation of said AC power source in a time sequence and correspondingly outputting a phase sensing signal; and a programmable chip electrically connected with said sensing device, said phase detector and said trigger circuit of said controller and adapted for receiving the current signal outputted by said sensing device and the phase sensing signal outputted by said phase detector, said programmable chip functioning to convert said current signal into a time-domain voltage signal and then executing a shock response spectrum analysis to convert said time-domain voltage signal into a frequency-domain voltage signal, thus for monitoring an inrush current produced by the primary winding of said transformer and then outputting a corresponding first control signal to said trigger circuit to change a time point of the input of said DC signal into said current-conduction switch.