| Customization: | Available |
|---|---|
| After-sales Service: | Warranty Certificate |
| Warranty: | 12 Months |
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English version available
| No load voltage | ≥7500V |
| Short circuit current | ≥100mA (when adjusting balance, it is recommended to set it at 5~40mA); |
| Positioning accuracy | ±(0.2%·L±1)m |
| Weight | 25kg |
| Power supply | AC 220V (±10%), 50Hz±1Hz; 8.4V built-in battery. |
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Introduction of panel
1. Galvanometer: electrical balance zero point is adjustable;
2. Ammeter: output current indication mA meter;
3. Voltmeter: high voltage output voltage indication kV meter;
4. High-voltage indicator light: This light lights up when there is high-voltage output;
5. Display: displays the operation content;
6. Zero indicator light: When this light is on, it indicates that the voltage output is in zero state;
7. Power socket: instrument working power supply, AC 220V connection port;
8. Fuse holder: The installation place of the fuse of AC 220V power supply system;
9. Power switch: "I" turns on the AC 220V power supply switch, "0" turns off the system power;
10. Start button: When the zero light is on, it means that the voltage output is in the zero state. When it is on, the start button is effective. If the zero light does not light up after turning on the power switch, press the step-down button until the light is on. When the zero light is on, , press this button to start high voltage and generate high voltage output;
11. Stop button: When the test is completed or an abnormality occurs, press this button to cut off the high-voltage output;
12. Boost button: Press this button to increase the output high voltage from small to large;
13. Pressure reduction button: Press this button to reduce the output high voltage from high to low;
14. Selection: "Select" encoder switch operation convention: rotation---cursor movement or number modification operation;
Press---Perform or confirm the operation.
15. Sensitivity adjustment: Built-in battery-powered switch; Adjust the sensitivity and use it with the zero adjustment knob;
16. Zero adjustment knob: Rotate the zero adjustment knob to make the galvanometer point to zero;
17. Balance adjustment: Adjust the balance knob until the galvanometer deflects significantly so that the galvanometer points to zero. (If the pointer is to the left, rotate clockwise; if the pointer is to the right, rotate counterclockwise). Observe and record its reading P1;
18. Indicator light: Built-in battery working indicator light, this light will turn on after the sensitivity adjustment is turned on;
19. Reference item: The black clip of the output line is connected to the reference phase;
20. Faulty phase: The red clip of the output line is connected to the faulty phase;
21. Charging: DC8.4V charging port, connect the 8.4V charger to start charging;
22. Grounding post: instrument grounding point, safety protection.
For specific operation methods, please contact us to provide you with more information and services.
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Working principle
The principle of the cable fault location bridge method is as follows: short-circuit the fault phase and the non-fault phase of the cable under test, connect the two arms of the bridge to the fault phase and the non-fault phase respectively, and adjust an adjustable resistor on the two arms of the bridge to make the cable Bridge balancing, using proportional relationships and known cable lengths, allows the distance to fault to be determined. The advantage of the cable fault location bridge method is that it is relatively simple, and its accuracy meets the requirements of on-site engineering testing. It is very convenient to measure two-phase short-circuit faults in cable lines. Using the Murray bridge to locate the breakdown point is a classic method, which is convenient and accurate. The bridge method is based on the fact that the resistance of the wire core (or shielding layer) is uniform and proportional to the length. The following figure shows typical usage:
HV is a high voltage constant current source.
Faulty cable CD and auxiliary cable AB have the same core cross-section and length L, and the distance between the fault point and the measuring end is X.
The measurement clamp is connected to both ends of the cable core A and C. The two sides of the clamp are the current and potential ends, which should be reliably connected to the cable.
R is the balance potentiometer, and its reading is percentage.
G is a galvanometer, the electrical balance zero point is adjustable.
At the remote end, both ends of BD must be short-circuited and the short-circuit must be ensured securely.
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Packing list
| Host(main unit) | 1set |
| High power connection wires |
1set |
| Power cable |
1pcs |
| Output cable(red, black) |
1set |
| Ground wire |
1pcs |
| Charger |
1pcs |
| Fuse(3A) |
5pcs |
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Application
If you need a cable sheath fault pinpoint locator, please contact us.
Packaging: Wooden case filled with foam
Shipping: by Air, Sea, Express, etc.
Shipping time: 7-15 days if it's in stock.
A: We are factory.
A: Generally it is 5-10 days if the goods are in stock. or it is 15-20 days if the goods are not in stock,
it is according to quantity.
A: Payment<=1000USD, 100% in advance.
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