Intercomparison of high voltage impulse measurements
Two high voltage impulse dividers, one rated for 300 kV and the other for 1 MV, were circulated to seven laboratories within the European Community. Each laboratory measured the voltage ratio, step response parameters, peak voltage errors and front time errors of the dividers according to the revision draft of IEC 60. All participating laboratories agree within +/- 0.15% for the ratio measurement in the range of 220:1, which is acceptable. The response parameters, however, show a wide spread. The majority of the laboratories agree to mean values of the response time and the partial response time within +/- 5 ns, which is acceptable. The voltage and time errors of the two dividers were measured by comparison with each other and with the laboratory's reference divider at full and chopped impulses of 100 kV. The majority of the laboratories agree to mean peak voltage errors within +/- 0.2% for full voltages, and within +/- 0.5-2% for impulses chopped at T(c) = 1.5-0.5 micro-s. The spread of the front time errors is, in general, within +/- 3.5% for full and chopped impulses. The comparison between the two divider systems can thus be made at most laboratories with an uncertainty of approximately only one third of the IEC error limits.
Bibliographic Reference: EUR 13682 EN (1991) 68 pp., MF, ECU 4, blow-up copy ECU 10.50
Record Number: 199210029 / Last updated on: 1994-12-02
Original language: en
Available languages: en