IEC 62475:2010

FOREWORD
1 Scope
2 Normative references
3 Terms and definitions
4 Procedures for qualification and use of a measuring
   system
5 Tests and test requirements for an approved measuring
   system
6 Steady-state direct current
7 Steady-state alternating current
8 Short-time direct current
9 Short-time alternating current
10 Impulse currents
11 Current measurement in high-voltage dielectric testing
12 Reference measuring systems
Annex A (informative) - Uncertainty of measurement
Annex B (informative) - Examples of the uncertainty
        calculation in high-current measurements
Annex C (informative) - Step-response measurements
Annex D (informative) - Convolution method for estimation
        of dynamic behaviour from step-response measurements
Annex E (informative) - Constraints for certain wave
        shapes
Annex F (informative) - Temperature rise of measuring
        resistors
Annex G (informative) - Determination of r.m.s. values
        of short-time a.c. current
Annex H (informative) - Examples of IEC standards with
        high current tests
Bibliography

IEC 62475:2010 is applicable to high-current testing and measurements on both high-voltage and low-voltage equipment. It deals with steady-state and short-time direct current (as e.g. encountered in high-power d.c. testing), steady-state and short-time alternating current (as e.g. encountered in high-power a.c. testing), and impulse-current. In general, currents above 100 A are considered in this International Standard, although currents less than this can occur in tests. This standard also covers fault detection during, for example, lightning impulse testing.