System description
16
3.2.2
Test cycle
The duration of a test current pulse cycle is 6 seconds. The IRDH575 or
PGH... alternatively sends positive or negative test current pulses. The
test cycle of the IRDH575 or PGH... is shown in different switch posi-
tions (1,2,3) in the block diagram below, ("Block diagram EDS system"
on page 15).
EDS start
Position
PGH...
1
2
3
3
1
2 sec
4 sec
2 sec
4 sec
