Cable outer sheath fault system

In the long-term operation of power cables, the integrity of the outer sheath is the first line of defense to ensure cable safety and prevent moisture and dampness from entering and causing insulation failures. As a specialized equipment for detecting and locating sheath damage points, it plays a key role in power preventive testing and fault repair.

Cable outer sheath fault systemMainly used for accurately locating the damaged points of underground or underwater cable outer sheaths (such as PE and PVC sheaths). Its working principle is usually to apply specific signals to the metal protective layer or grounding wire of the cable. When the signal reaches the damaged point, leakage will occur. The receiving device is used to detect the signal changes on the ground, thus achieving precise positioning of the fault point.

This system can be mainly divided into two categories: step voltage method and current direction method. The step voltage method is suitable for buried cables and can be used to locate by detecting the potential difference between two points on the ground surface; The current direction rule determines the location of the fault point by detecting changes in the direction of the signal current, and is applicable to various installation environments. Users can choose appropriate testing methods based on site conditions and cable types.

2、 Core advantages of the system

1. Accurate and efficient positioningThe modern cable outer sheath fault system can achieve positioning accuracy at the meter or even sub meter level, greatly reducing the excavation range, significantly improving maintenance efficiency, reducing maintenance costs, and minimizing the impact on the surrounding environment.

   
   

2. Relatively convenient operationHigh system integration, lightweight equipment, and professionally trained technicians can quickly get started. Clear interface instructions and intelligent judgment assistance make the on-site testing process smoother.

   
   

3. Prominent preventive effectRegular use of this system for inspection can promptly detect early damage or aging defects in the outer sheath of cables, achieving a transition from "repair after failure" to "prevention before failure", effectively extending the service life of cables, and improving the reliability of power grid operation.

   
   

4. Widely applicableThe system design takes into account various on-site conditions and is capable of handling cables laid in different ways such as direct burial, conduit penetration, and tunnels. It also has good detection adaptability for cable outer sheaths of different voltage levels and materials.