Ponovo T200A, Руководство по эксплуатации оборудования

Страница: 41 / 61

T200A Hardware Operation Manual
41
5.4.5 Excitation curve test

Connect wires as above figure shown

Select the Excitation Curve test menu, shown as above figure.

Set the start current value for output

Press the Run button to output the start current, elevate the current gradually
and record the corresponding voltages that have been measured and
corresponding series of test points.
Note: During the test, the current should be rise gradually and can’t be swing up
and down, which might cause remanence. The existence of remanence will have
great effects on the measuring results. Once this situation happens, you should
re-elevate the current to be higher than the original value and then decrease it
gradually to zero. Repeat foregoing process for one or two times, thus the effect of
CT remanence can be cured.