XHHG521A
The cable outer sheath fault tester is designed based on the Murray bridge principle and can be used to locate the breakdown points of various wires and cables, as well as defects that are not broken down but have low insulation resistance values.
Key Features
- Designed for rough measurement applications
- Reliable test equipment for cable maintenance
- Professional-grade fault location capabilities
Technical Specifications
| Measurement Type |
Rough measurement |
| Open circuit voltage |
≥7500V |
| Application |
Cable fault location |
| Equipment Type |
Test equipment |
The cable outer sheath fault tester is particularly suitable for:
1. High-resistance breakdown points in cables after installation, especially linear high-resistance breakdown points that are difficult to burn into low-resistance conditions, such as linear high-resistance breakdowns at cable joints.
2. Flashover-type breakdown points, where the constant current source can maintain the arc after breakdown, a stable current flows through the bridge, and the bridge has sufficient sensitivity.
3. Defects that have not yet broken down but have low resistance, such as insulation defects where a megohmmeter reveals a low cable resistance value, but the cable does not break down under operating voltage.
The distances from both ends of the cable under test to the breakdown point are L1 and L2, respectively. The total length of the cable is L, and the corresponding core resistances are R1 and R2.
Clearly, after connecting to the bridge circuit, the following circuit is formed.
The cable outer sheath fault tester is particularly suitable for:
1. High-resistance breakdown points in cables after installation, especially linear high-resistance breakdown points that are difficult to burn into low-resistance conditions, such as linear high-resistance breakdowns at cable joints.
2. Flashover-type breakdown points, where the constant current source can maintain the arc after breakdown, a stable current flows through the bridge, and the bridge has sufficient sensitivity.
3. Defects that have not yet broken down but have low resistance, such as insulation defects where a megohmmeter reveals a low cable resistance value, but the cable does not break down under operating voltage.
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