抄録
Intercomparison tests of dividers for lightning impulse measurement were carried out Japan participated by 12 laboratories. Two resistive dividers, one with 300 kV rating and the other with 1 MV rating, were circulated among the laboratories. The comparison test is one of the methods for checking the uncertainty of a high voltage measuring system, and is proposed in the course of the revision of an IEC standard to incorporate a new idea, that is, the traceability of the uncertainty in high voltage measuring systems.
This paper reports on the determination of the scale factor, evaluation of the unit step response parameters and the comparison tests with lightning impulse voltages at about 100 kV. It is demonstrated that the participating 12 laboratories are all capable of realizing the idea in the revision of the IEC standard, that is, to establish traceability. On the other hand, a few problems to be solved in the testing procedures are found, to reduce the scatter in the measured parameters in these tests.
