Superficial leakage Against Protection Texts

Surface Protection Test
Surface Protection Test

One of the most important causes of faults in high-voltage lines is the contamination that causes leakage current flowing from the surface of the insulators and creates surface jump. This pollution leads to energy cuts and economic losses. Skipping caused by surface contamination is a complex phenomenon that develops very quickly. These surface jumps cause discharges on the surface of dirty insulators.

The TS IEC 60989 standard published by the Turkish Standards Institute defines the surface leakage path length as follows: The shortest distance measured along the surface of the insulation material between the two conductive sections (TS IEC 60989 Transformers - Isolation transformers, autotransformators, adjustable transformers and reactors).

According to TS EN IEC 60079-7 standard, surface leakage test of solid insulators is performed. According to this standard, superficial leaks are a formation which occurs in or on the surface of a solid insulating material as a result of the combined effect of electrolytic contamination and the force of the electrical force and which develops on conductive roads. Insulation problems caused by such surface leakages between conductive parts are called surface leakage failure. An electrical strain is applied to the surface of the test sample using two electrodes. As a result of this test, a discontinuous flame is allowed, but materials that do not cause flame are recommended.

The laboratories that will perform surface leakage protection tests within the framework of electrical safety tests must be accredited in accordance with the TS EN ISO / IEC 17025 Basic Requirements Standard for Calibration and Test Laboratories, or they must be qualified by the notified body in accordance with this standard.

In addition, in order to ensure that the tests are fast, reliable and of high quality, these laboratories must use state-of-the-art test equipment on the one hand and have trained and experienced engineers on staff.