How to check the leakage of buried lines, and how to check the leakage of buried cables

It is necessary to detect the surrounding ground potential, and the ** segmentation method can shorten some inspection time.

Method, with the elimination method, requires the elimination of low-potential regions step by step to narrow the detection range. Until the final position is determined.

Here's a how:

2. Use the "bisecting method" to hit the grounding electrode B at L 2;

3. Connect B with a wire (named wire as W) to near the A end;

4. Measure the ground resistance Rx and Rw of the line (named X) and W at the A end;

5. Compare the size of Rx and Rw, and judge the distance between B and the leakage point;

6. According to the difference of 5 results, estimate the length of the error distance;

7. Then use the "biparting method" to reselect position B to hit the grounding electrode;

8. When Rx and Rw are close to the same, the vicinity of B is the leakage.

Summary. Use two metal rods that have been insulated handles, connect to the multimeter, AC bottom voltage level, and plug it in a few meters along the direction of the buried underground cable, where the maximum voltage is the place of leakage. You can also use a voltage tester to connect a long metal dot to the ground.

Hello dear. The leakage point of the cable can generally be detected by a leakage tester, but if you don't have this instrument at hand, you have to use a multimeter to detect it.

Make a self-made leakage detection device, bend the iron wire into a circle just enough to pass through the cable, and then open the resistance gear of the multimeter by 10k position, and pass the cable through the iron ring. When the multimeter hand turns, it means that the leakage point is there.

Use two metal rods that have been insulated handles, connect to the multimeter, AC bottom voltage level, along the direction of the buried underground cable, and plug it in a few meters, where the maximum voltage is the place where the leakage is located. You can also use a voltage tester to connect a long metal dot to the ground. Danchun faction.

Hope it helps.

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Summary. Dear, hello, I am glad to answer for you the buried in the underground cable leakage so check, underground cable leakage how to check with a cable detector. There is no cable detector.

Use the segmented measurement method. The detection of cable faults generally goes through three steps: diagnosis, ranging, and fixed-point. If the cable is a buried wire, at this time, you can use the buried wire tester to check and troubleshoot the buried wire fault detector, turn on the machine, connect the power supply of the wire according to the instruction manual, connect the probe, and bury it along the geographical line.

Dear, hello, I am glad to answer for you the buried in the underground cable leakage so check, underground cable leakage how to check with a cable detector. There is no electric cable detector. Use the segmented measurement method.

The detection of cable faults generally goes through three steps: diagnosis, ranging, and fixed-point slag liquid. If the cable is a buried wire, at this time, you can use the beam to let the buried wire tester for inspection and troubleshooting, turn on the buried wire fault detector, connect the power supply of the wire to be connected according to the instruction manual, connect the probe, and bury it along the geographical line.

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How to quickly check the leakage of buried wires with armor in the ground: 1. Power-off measurement: First of all, turn off all electrical appliances at home, adjust the multimeter to the RX10K file, connect one pen to the live wire, and the other meter pen to ground, which should show that the resistance is infinite, otherwise the electricity will leak.

2. Live measurement: first answer the shed, the multimeter is adjusted to 250 volts AC voltage level, and then measure the leakage electrical shell, one pen shell, the other meter is grounded, if the pointer shows that the voltage is between 30 and 50 volts, change to AC 50 volts. If the power supply is confirmed to be more than 30 volts, it is a leakage, and less than 30 volts is a normal source.

3. Leakage measurement between the live wire and the neutral wire (or two live wires): turn off and disconnect all electrical appliances in the home, and then measure the resistance between the live wire and the neutral wire, which should be infinite, otherwise it is a leakage phenomenon.

1. If there is a special buried wire leakage tester, this instrument needs to be operated by one person. Insert the headphone plug into the headphone jack of the instrument, press the switch, and the indicator light will be on. Connect the wires on the detection board to the red and black binding posts respectively, and then touch the detection board a few times, and at the same time, the horn sound should be heard in the earphone, and the machine is normal.

2. Buckle the nailed detection plate on the left and right feet of the detector respectively as the two grounding points of the detector, and then the buried line can be detected. Above the buried line from one end of the line to the other end, slowly walking forward, in the well-insulated line section to the ground, the earphone is basically silent, when approaching the fault point (c), the sound gradually from small to large, to the fault point (a).

The sound is the loudest, and when the fault point is crossed to (b), the sound will change from large to small to silent, and then it can be returned to the place (a) when the sound is the loudest, which is the leakage fault point. In order to improve accuracy, when detecting the fault point again, the detector's feet should be as far apart as possible. to reduce the area of the grounding point.

After a period of detection, if you find that the brightness of the indicator light is not enough, you must charge it before detection.