The major work is to check out fault points ASAP when the transmission line is tripped off,so as to less the loss and shorten the trip-off duration.

It gives a brief introduction to the styles and reasons of the basic faults of power cable,which leads to the two practical methods of confirming the cable fault point: Bridge Method and Null Potential Method.

Using harris transport network long-distane alarm and supervising system farscan to supervising microwave channels and orientation fault point for long-distance control.

On the fault location for XLPE power cables;

With the development of optical communication networks,the technology for cable fault location and shooting has become a widely used new technology,which requires that the service men locate and remove cable fault promptly.

In order to locate power cable fault fast and accurately,the acoustic propagation time measurement was developed to detect cable fault.

The paper introduces two applied method of mensurting cable trouble point.

It is pointed out here that errors would always exist when we measure the actual trouble spot of the optical cable.

But when the old direct server can not recovery in time, the newdirect server will become a latent single fault spot, this will reduce the system utility.

The gear corrosive pitting recognition based on wavelet packet analysis and frequency-band energy decomposition;