Using the tester, we can get the relationship between
the bounce times and make-break times, the relationship
between the arcing energy and make-break times, the
relationship between the arcing time and make-break
times, the relationship between the welding strength and
make-break times and the relationship between the
contact resistance and make-break times. The test current
is 40A which is the same with in practice using. The
curve of the bounce times and make-break times is shown
in figure 6. From the curve, we can see that the bounce
times decrease between 3000 times and 7000 times. The
reduction of the bounce times is helpful for the
contactor’s making but unfavorable for removal of
membrane resistance. Thus, the curve of the resistance
and the make-break times is shown in figure 7. We can
know the contact resistance of 40A increases between
3000 times and 7000 times.