What is Tan Delta test?
TAN Delta is a procedure that the tool can use to check the quality of insulation in the middle to high voltage cable. The technician can use this test in the diagnostic evaluation of the cable that does not perform correctly. It can also be part of the control of routine maintenance to see if the insulation is still in good condition. The test requires some special equipment for measuring the resistance in the cable while the current passes through it.
When the cable is in good condition, voltage and current is subject to phase shift and operates at an angles of 90 degrees, rather than cycling in the settlement. As the insulation decreases, the phase shift level decreases. During the Tan Delta test, the technician deals with a change in the angle known as Delta. The test measures tan Gent from the angle delta to determine how much insulation is and in what condition it is. The score of zero indicates the cable in perfect shape.
One of the most common problems that this test can reveal is a phenomenon called a water tree. Water trees are deposits of water that are formed inside the cableours when they are exposed to moisture. Utility uses insulation and forced air to maintain the cables as high as possible, but when the insulation begins to disintegrate, moisture can penetrate. Finally, such lines will need an exchange because they may fail or pose a safety danger. The Tan Delta regular test can determine which lines should be preferred for exchange and which can wait.
This test does not provide information about the location of the problem. It only shows that the insulation somewhere between two points begins to crumble. The technician can manually check the cable to look for obvious physical signs of damage, or can perform further testing to learn more about the situation. Tan delta testing equipment usually creates a number of other products prodiagnosis of problems in electrical cables.
When performing the TAN Delta test and working with medium and high voltage management, technicians in general must take measures to protect against electric shock. This is particularly important when staffServices respond to customer reports about a problem such as an arch line. If there is something wrong on the line, there is an increased chance that it can behave unusually and the inability to wear protective equipment and processing line with care can be dangerous.