High Voltage Laboratory

Research / Developments Activities

AC/DC High Voltage Test Facilities

AC 1,000KV/DC 800KV class insulator string assemblies in actual scale are carried out in the laboratory. Withstand and flashover voltage tests for insulator string assemblies can be also carried out. The observation of dry and wet corona nearly in actual is possible in the laboratory. Results of these tests have been actually reflected to the anti-corona design for actual UHV transmission lines.

AC/DC High Voltage Test Facilities

1000kV suspension insulator string assembly under wet corona test

Power-frequency flashover voltage test on 500kV tension insulator string assembly (Vertical arrangement)

Contamination Tests

Contamination tests are carried out in the laboratory. Observing characteristics of withstand voltage under various kinds of contaminated conditions such as marines ,industrial and desert etc., we research and develop insulator designs and shapes to cope with any contaminated conditions.

Artificial contamination test on 1000kV hollow insulator

Artificial contamination test on 800kV V-arranged suspension insulator string assembly

Artificial contamination test on 500kV polymer hollow insulator

Impulse Tests

The tests for 1000kV class insulator string assemblies are carried out in the laboratory. We research characteristics of lightning/switching impulse withstand voltage in actual scale. Results of these tests are reflected to insulation designing in transmission/substation field.

4200kV Lightning Impulse Generator

Lightning Impulse flashover voltage test on 1000kV insulator string assembly

Switching Impulse flashover voltage test on tension insulator string assembly covered with snow

Mechanical Tests

Mechanical tests for insulator string assemblies are also carried out in the laboratory. The results of such tests as mechanical intensity tests, artificial galloping test for insulator string assemblies and hollow insulators are reflected to mechanical designs of insulators.

Bending test on hollow insulator

Time load test on polymer insulator