EVS-EN IEC 60060-1:2025

IEC 60060-1 applies to:

— dielectric tests with direct voltage,
— dielectric tests with alternating voltage,
— dielectric tests with impulse voltage,
— dielectric tests with combinations of the above.

IEC 60060-1 applies to tests on equipment having its highest voltage for equipment Um above 1,0 kV AC and 1,5 kV DC. This edition includes the following significant technical changes:

— The general layout and text have been updated and improved to make the standard easier to use, particularly the clauses for combined and composite test voltages.
— The positive tolerance of the front time of lightning impulse voltage has been extended for Um > 800 kV to 100 % (= 2,4 µs).
— For switching impulse voltage, a front time has been introduced, similar to lightning impulse voltage and with the new front time the standard switching impulse is defined as 170/2 500 µs.
— The requirements for precipitations have been adjusted depending on Um.
— A new Annex C, "Procedure for manual calculation from graphical waveforms" has been incorporated.
— No examples of software have been given in Annex D, "Guidance for implementing software for evaluation of lightning impulse voltage parameters".
— The annex relating to the "Background to the introduction of the test voltage factor for evaluation of impulses with overshoot" has been deleted.
— A new informative Annex F, "New definition of the front time of switching impulse voltage" has been incorporated.

IEC 60060-1:2025 text has been approved in Europe as EN IEC 60060-1:2025 without any changes.