5000h Isolator Multi Test Machine IEC 62730-2024

Technical Specifications for the 5000 - hour Multiple Stress Test Setup in accordance with IEC 62730:2024

IEC 62730:2024

In this document, the technical requirements of the 5000h multiple stress test bench are given according to IEC 62730:2024.

Test Procedur

The test shall be carried out in a moisture sealed corrosion-proof chamber, the volume of which shall not exceed 20 m3.

Test Conditions

The cycle of stresses applied to the insulators and repeated for a period of 5 000 h is shown in Figure 3. The cycle is designed
so that the test specimens are also subjected to the effects of temperature variation and condensation .

Voltage

The power frequency test voltage in kilovolts is adjusted to the actual creepage distance of
the test specimens. it is determined by dividing the creepage distance in millimetres by 34,6
(equal to a specific creepage distance of 20 mm/kV, calculated as phase-to-phase value) .

Solar Simulation

The simulated solar irradiation is provided by a xenon arc lamp with a nominal output of 6500 W and equipped with 2 boron silicate
glass filters (see example in Figure 5) . The distance between the xenon lamp and test specimens is approximately 480 mm.

A new lamp and filters shall be used at the beginning of each test. The filters and , if necessary, the lamp shall be replaced
during the test according to the lamp manufacturer's recommendations .

Artificial Rain

The artificial rain shall be provided by nozzles mounted above the test specimens and outside their perimeter (see Figure 4 ). The
average precipitation rate shall be in accordance with IEC 60060-1 . Water of a minimum resistivity of 85 nm shall be used. Each
of the test specimens is sprayed individually.

Dry Heat

The chamber is heated up to 50 °C ± 2 °C; the time far the temperature to rise is 15 min as a maximum.

NOTE it is recommended to heat and insulate the walls of the chamber.

Humidity

Nominal relative humidity: RH = 95 % ± 3 % at 50 °C.