SERVICE MANUAL R5888B
QUADRAMHO Chapter 5
Appendix A
Page 5 of 18
Test Test and method LED Comments
option indications
no.
50 Zone 1 comparators A–N A As option 40
(secondary inject B–N B
Zone 1 fault) C–N C
A–B Z2
B–C Z3
C–A AIDED TRIP
Breaker open opto SOTF
input (apply rated
volts to A3–A4)
Reset Zone 1 extension/ V~FAIL
miniature circuit breaker
opto input
(apply rated volts to
A1–A2)
51 Zone 2 comparators A–N A As option 41
(secondary inject B–N B
Zone 2 fault) C–N C
A–B Z2
B–C Z3
C–A AIDED TRIP
Signal receive/reset SOTF
Zone 1 extension opto input
(apply rated volts to A9–
A10)
Channel in service opto V~FAIL
input (apply rated volts
to A7–A8)
52 Zone 3 comparators A–N A As option 42
(Secondary inject B–N B
Zone 3 fault) C–N C
A–B Z2
B–C Z3
C–A AIDED TRIP
Zero sequence voltage
level detector (apply low SOTF
voltage and increase to pick up)
Inhibit PSB opto input
(apply rated volts to V~FAIL
A5–A6)
Figure 3: Sheet 3
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