Alstom SHPM 101 - Level Detector Gating of Comparators

SERVICE MANUAL R5888C
QUADRAMHO Chapter 2
Appendix A
Page 56 of 71
Figure 65: Level detector gating of comparators
CURRENT DETECTOR
CURRENT DETECTOR
CURRENT DETECTOR
CURRENT DETECTOR
COMPARATOR
COMPARATOR
COMPARATOR
LDLS
N
CpAZn
LDLS
A
CpBZn
LDLS
B
CpCZn
LDLS
C
COMPARATOR
COMPARATOR
CpBCZn
CpAZn
COMPARATOR
CpCAZn
VAT BLOCK
CURRENT DETECTOR
LDLS
N
Z
n
N
&&
&
&
&
&
&
1
1
&
&
&
&
&
&
1
1
&
LDCpAZn
LDCpBZn
Z
n
A
LDCpCZn
Z
n
B
LDCpABZn
Z
n
C
LDCpBCZn
Z
n
N
LDCpCAZn
35ms
0
n = 1
or n = 2
n = 3
0
n refers to Zone (1, 2or 3)