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High Voltage Laboratory | Research / Developments Activities

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(1)AC/DC High Voltage Tests

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.

1000kV V-arranged suspension insulator string assembly under corona test

1000kV V-arranged suspension
insulator string assembly
undercorona test

1000kV suspension insulator string assembly under wet corona test

1000kV suspension
insulator string
assembly under wet
corona test

Power-frequency flashover voltage test on 500kV tension insulator string assembly

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

(2)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 1000kV hollow insulator

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

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

Contamination test of comparing semiconducting glazed insulators(left side)and ordinary glazed insulators(right side)

Contamination test of comparing semiconducting glazed insulators(left side)and
ordinary glazed insulators(right side)

(3)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.

Lightning Impulse test on arrester for 500kV transmission line

Lightning Impulse test
on arrester for 500kV
transmission line

Switching Impulse flashover voltage test on 1000kV insulator string assembly

Switching Impulse
flashover voltage test
on 1000kV insulator
string assembly

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

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

(4)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.

Artificial galloping test on tension insulator string assembly(540kN suspension insulators)

Artificial galloping test
on tension insulator string assembly
(540kN suspension insulators)

Time load test on polymer insulator

Time load test on polymer insulator


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