Alstom SHPM 101 - Page 191

SERVICE MANUAL R5888C
QUADRAMHO Chapter 2
Appendix A
Page 55 of 71
1 1 1
1
&
1&
0
22ms 22ms
0 0
22ms
0.2ms
0
BREAKER OPEN OPTO VOLTAGE DETECTOR LDOV
A
CURRENT DETECTOR LDLS
A
VOLTAGE DETECTOR LDOV
B
CURRENT DETECTOR LDLS
B
VOLTAGE DETECTOR LDOV
C
CURRENT DETECTOR LDLS
C
ANY POLE DEAD
POLE DEAD A
POLE DEAD B
POLE DEAD C
ALL POLES DEAD
COMPARATOR
RESET PULSE
Figure 64: Level detector pole dead logic