Pulse injection method can more sensitively reflect faults of various types of transformer winding

the principle of this method is that inject pulse square wave on-line and judge the winding conditions by measuring the response signal. Portable charging detector can achieve the above functions better

the capacitive sensor signal device is an important component part

the part is directly mounted on the power transformer bushings

in order to ensure the injected signal has no effect on the online operation transformer

it requires this part does not affect the electric field distribution of the casing

without affecting the insulating characteristics of the insulating sleeve. For different voltage levels of power transformers

corresponding capacitive coupling sensor signal generating means is designed

the electric field distribution of corresponding device is verified by simulation and it is proved that it has no effect on the operation of power transformers

while the lightning impulse test

the insulation performance of the device is test. Research and development of the device laid the foundations for the successful application of pulse line injection method.