Cable Outer Sheath Fault Tester Cable Outer Sheath

1. The cable outer sheath fault tester is designed based on the principle of MURRAY bridge. It can be used to locate the breakdown points of various wires and cables and the defect points without breakdown but low insulation resistance.
2. The equipment uses an electric voltage regulator and an R-type transformer to form a high-voltage constant current source, and the button operation increases and decreases the voltage. The no-load voltage is 5000V, the short-circuit current is 100mA, and the high-sensitivity amplifier and galvanometer are used to indicate balance. It forms a balance bridge with a proportional potentiometer, and the whole is placed at a high potential.
3. The measuring cable is a specially designed double-core high-voltage rubber cable. The four-terminal resistance measurement method avoids the error introduced by the lead resistance.
4. The operating knob on the panel operates the internal high voltage through the insulating rod. The entire panel is at a low potential.
5. The equipment is also equipped with a 12806 display screen, one-key operation, the input cable length can be automatically calculated, and the distance to the fault.
6. The high-voltage source and the electric bridge are integrated in a portable protective box. Therefore, the equipment has high voltage, light weight, convenient operation and safe use.
7. Compared with the wave reflection method, the bridge balance method has no blind spots, and is particularly suitable for judging short cables and the breakdown point near the end.

1. No-load voltage: ≤4000V
2. Short-circuit current: ≤100mA
3. Positioning proportional accuracy:±(0.1%•L±1) m
4. Weight: 5.5kg
5. Power supply: AC 220 and 9V batteries, Working power supply: AC 220V+/-10% 50Hz