The cable fault tester is one of the equipment used to detect cable faults, and its main function is to detect the fault location in the cable and its accessories (joints, terminals, etc.), and provide a scientific basis for cable maintenance and repair. During the test, the boost range is one of the very important parameters because it directly affects the accuracy of the test results.
1. The boost range of the cable fault tester.
The cable fault tester mainly uses the breakdown effect of high-voltage charge on the surface of the cable insulation material to detect cable defects. Common cable fault testers have a boost range of 0 10kV or 0 15kV. In actual use, users need to select the appropriate boost range according to the rated voltage, length, insulation material and other parameters of the cable under test.
Second, the selection of the boost range.
In practice, it is very important to choose the right boost range. If the boost range is too small, the test results may be misjudged or missed due to insufficient voltage, which can affect maintenance. At the same time, if the boost range is too large, small defects in the cable insulation can be magnified, resulting in inaccurate test results.
Therefore, when selecting a cable fault tester, it is necessary to carefully analyze the parameters of the cable under test and determine the appropriate boost range. For more information, please refer to the following steps:
1.Determine the rated voltage of the cable under test, generally speaking, if the selected boost range is less than the rated voltage of the cable, the test results may be misjudged or missed.
2.Determine the length of the cable under test, the longer the cable length, the greater the voltage that needs to be consumed during the test. Therefore, it is necessary to select a higher boost range when testing long cables.
3.Determine the type of cable insulation material, different insulation materials have different breakdown voltages, so you need to choose the appropriate boost range when testing.
4.Combined with the actual situation, in the actual use, it is also necessary to comprehensively consider the environmental conditions of the test, the accuracy of the instrument and other factors.
3. How to control the boost range.
During the test, in order to ensure the accuracy of the test results, it is necessary to control the boost range according to the actual situation. Common control methods include:
1.Manually adjust the boost range, for some manually controlled cable fault testers, the user can manually adjust the boost range according to the test needs.
2.Automatic control of the boost range, some digital cable fault testers can automatically control the boost range by setting parameters, which is more accurate and precise. For example, according to the insulating material, length and other parameters of the cable, the instrument automatically selects the appropriate boost range, which avoids misjudgment caused by the negligence of the tester.
Fourth, summary. The cable fault tester is a very important test equipment, and it is necessary to select the appropriate boost range according to the parameters of the cable under test during use. In the actual test, it is necessary to pay attention to controlling the boost range to avoid the test error caused by too high or too low the boost range. Only by mastering the selection and control method of the boost range can we more accurately diagnose cable faults and provide strong support for cable maintenance.