18
Fig. 9
(
7
)
Thyristor element (Fig. 11a), waveform characteristics: fixed position, each element
generates an independent signal. When the circuit is connected and the electromagnetic
coupling effect is enhanced, the signal amplitude increases. During the voltage regulation
test, the pulse signal will generate high frequency waveform broadening, thus increasing
the space occupation (Fig. 11b). The reason is that there are silicon controlled elements
nearby in operation.
Fig. 11a
Fig. 11b
(8) Relay, contactor, glow tube and other actions (Fig. 12), waveform characteristics:
irregular or intermittent waveform,
It has nothing to do with the test voltage. Cause: thermal relay, contactor, spark tester
and recorder with spark discharge act.
Fig. 12
(9) Induction motor (Fig. 13), waveform characteristics: two symmetrical clusters of