Sel 411L - Table 9.6 BRE Command

P.9.17
Date Code 20151029 Protection Manual SEL-411L Relay
Monitoring and Metering
Circuit Breaker Monitor
The BRE 1 C, BRE 2 C, BRE 1 R, and BRE 2 R commands reset the
accumulated circuit breaker monitor data for Circuit Breaker 1 or Circuit
Breaker 2, respectively. The clear commands BRE C A and BRE R A clear
all data for both circuit breakers. The Global Setting SEL
OGIC equations
RST_BK1 and RST_BK2 can also be used to reset the circuit breaker data.
The BRE 1 or BRE 2 commands display the circuit breaker report for the
most recent Circuit Breaker 1 or Circuit Breaker 2 operation, respectively.
You can also reset the circuit breaker report with Global SEL
OGIC setting
RST_BK1 and RST_BK2 for circuit breaker report 1 and 2, respectively. You
must first set EDRSTC (Data Reset Control) to Y to access these Global
settings.
The relay also displays the operation summary and the circuit breaker alarms.
When the circuit breaker maintenance curve reaches 150 percent for a
particular pole, the percentage wear for this pole remains at 150 percent (even
if additional current is interrupted) until reset. However, the relay continues to
advance the operation counter to as many as 9999999 operations per pole until
reset. Accumulated circuit breaker wear/operations data are retained if the
relay loses power or if the circuit breaker monitor is disabled (EB1MON := N
and EB2MON := N).
Circuit Breaker Report
Figure 9.9 is a sample breaker report (shown with typical data). The relay
reports DC battery monitor voltages for the minimum dc voltage during a
20-cycle period at circuit breaker monitor trip initiation (BM1TRP) and for a
30-cycle window at circuit breaker monitor close initiation (BM1CLS). The
circuit breaker report contains data only for options that you have enabled. For
example, if you set EDCMON := 1, then the relay does not show the row
labeled
Last Op Minimum DC2 (V).
Ta b l e 9.6 BR E C om m a n d
Command
a
a
n is 1 or 2, representing Circuit Breaker 1 and Circuit Breaker 2, respectively.
Description Access Level
BRE C A Clear all circuit breaker monitor data to zero. B, P, A, O, 2
BRE R A Clear all circuit breaker monitor data to zero. B, P, A, O, 2
BRE n C Clear Circuit Breaker n data to zero. B, P, A, O, 2
BRE n R Clear Circuit Breaker n data to zero. B, P, A, O, 2
BRE n Display the breaker report for the most recent Circuit
Breaker n operation.
1, B, P, A, O, 2
BRE n H Display history data for the last 128 Circuit Breaker n
operations.
1, B, P, A, O, 2
BRE n P Preload previously accumulated Circuit Breaker n data. B, P, A, O, 2