The iron core and winding fault is a common and serious fault

and the fault diagnosis method is mainly based on method of off-line detection

it’s lack of safety and convenience. Aiming at this problem

an online monitoring system for transformer vibration is developed based on principle of vibration method

and by vibration verification platform

verify that its precision which meets the demands

and vibration characteristic frequency of transformer is derived by analyzing actual monitoring data and long time monitoring verifies stability of the system.This system complements and improves traditional fault diagnosis method of transformer.