BE1-CDS220 Application
8-27
State Labels
Output
Purpose Description
Label
True False
VO11 Protective trip expression.
TRUE when any 87, 250T, 51,
151 or 251 element has timed
out.
PROTECTIVE
TRIP
NORMAL
BESTlogic Expression: VO11= 87RT+87UT+51NT+151PT+151NT+151QT+251PT+
251NT+251QT
VO12 Protective pickup expression
TRUE when any 87, 250T, 51,
151, or 251 element is picked
up.
PROT-PICKE
PU
NORMAL
BESTlogic Expression: VO12=87RPU+87UT+51NPU+
251QPU
(87UT is included to trigger the fault recorder because there is no unrestrained pickup output.)
VO13
Alarm to indicate that the
differential cutoff switch is in
the block operation position.
TRUE if virtual switch 43 is in
the closed position.
87-BLOCKED
ACTIVE
NORMAL
BESTlogic Expression: VO13=43
VO15
Alarm bit #23 indication that
the relay is in test mode and
that breaker failure is
disabled.
TRUE if IN8 is de-energized or if
virtual switch 743 is closed.
IN8-ALARM
ACTIVE
NORMAL
BESTlogic Expression: VO15=/IN8+743
Summary of Contents for BE1-CDS220
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Page 112: ...ii Metering BE1 CDS220 This page intentionally left blank...
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