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The high-voltage 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 after laying and the defect points that have no breakdown but low insulation resistance values. Of course, it can also be used to locate defect points of various cables in cable factories.
1. The high-resistance breakdown point of the cable after laying, especially the linear high-resistance breakdown point that is difficult to burn into low resistance, such as the linear high-resistance breakdown of the cable intermediate joint.
2. Flashover type breakdown point. After breakdown, the constant current source can maintain the arc, 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 found with a megohmmeter that have low cable resistance but do not break down under the operating voltage.
Technical indicators
| No-load voltage |
≥7500V |
| Short circuit current |
≥40mA |
| Positioning proportion accuracy |
±(0.2%·L±1) meters |
| Weight |
3.5kg |
| Working power supply |
220V |
| Serial number | Name | quantity |
|
1
|
Host | 1 |
|
2
|
Output line | 2 |
|
3
|
Power cord | 1 |
|
4
|
Ground wire | 1 |
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