SERVICE MANUAL R5888C
QUADRAMHO Chapter 2
Page 25 of 74
When a test option is selected (or an invalid scheme) the “relay inoperative” alarm
contact will close and the “relay available” LED will extinguish.
The full schemes do not run when a test option is selected. Below is a list of the
features that are run when a test option is selected:
a) Digital synchronous polarising.
b) Pole dead logic.
c) Master reset pulse on “All Poles Dead” conditions.
d) Band pass filter switching logic.
Test LED
option Test and method indications Comments
no.
40 Zone 1 comparators gated A–N A Amplitude and
with low set current B–N B angular hysteresis
level detectors C–N C operate on any
Zone 1 comparator.
(Secondary Inject A–B Z2 No tripping will
Zone 1 Fault) B–C Z3 occur
C–A AIDED TRIP
Breaker open opto input
(Apply rated volts to A3–A4) SOTF
Reset Zone 1 extension opto
input (Apply rated volts to V~ FAIL
A1–A2)
The “Zone 1 extension” opto is
redesignated as “miniature
circuit breaker open” opto
when this version has been
supplied.
41 Zone 2 comparators gated A–N A Amplitude and
with low-set current B–N B angular hysteresis
level detectors C–N C operate on any
(Secondary inject A–B Z2 Z2 comparator
Zone 2 fault) B–C Z3 No tripping will
C–A AIDED TRIP occur.
Signal receive opto input
(Apply rated volts to A9–A10) SOTF
Channel in service opto input V~ FAIL
(Apply rated volts to A7–A8)
The “signal receive” opto also
can be used to “reset Zone 1
extension” for the appropriate
thumbwheel selection option,
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