This Part of GB/T 16927 specifies
This Part is applicable to tests on equipment having its highest voltage for equipment Um above 1 kV:
a) Dielectric tests with direct voltage;
b) Dielectric tests with alternating voltage;
c) Dielectric tests with impulse voltage;
d) Dielectric tests with combinations of the above.
Note 1: For on-site testing, see GB/T 16927.3.
Note 2: Alternative test procedures may be required to obtain reproducible and significant results. The choice of a suitable test procedure should be made by the relevant technical committee.
Note 3: For voltages Um above 800 kV meeting some specified procedures, tolerances and uncertainties may not be achievable.