P.9.18
SEL-411L Relay Protection Manual Date Code 20151029
Monitoring and Metering
Circuit Breaker Monitor
=>BRE 1 <Enter>
Relay 1 Date: 03/20/2001 Time: 17:21:42.577
Station A Serial Number: 2001001234
Breaker 1
Breaker 1 Report
Trip A Trip B Trip C Cls A Cls B Cls C
Avg Elect Op Time (ms) 5.8 7.5 8.4
Last Elect Op Time (ms) 18.2 20.0 17.9 8.4 10.4 8.4
Avg Mech Op Time (ms)
Last Mech Op Time (ms) 25.8 24.4 26.5 30.1 26.3 34.2
Inactivity Time (days) 1 1 1 1 1 1
3 Pole Trip 3 Pole Close
AB BC CA AB BC CA
Max Pole Scatter (ms) 5.1 3.1 5.0 6.3 4.1 2.1
Last Pole Scatter (ms) 2.1 1.0 3.1 4.1 2.1 2.1
Pole A Pole B Pole C
Accum Pri Current (kA) 3.13657 0.43533 0.41785
Accum Contact Wear (%) 0.5 0.5 0.5
Max Interrupted Current (%) 1.6 0.2 0.2
Last Interrupted Current(%) 1.6 0.2 0.2
Number of Operations 5 5 5
Alarm Total Count
Mechanical Operating Time MSOAL 4
Electrical Operating Time ESOAL 3
Breaker Inactivity Time BITAL 0
Pole Scatter PSAL 2
Pole Discrepancy PDAL 1
Current (kA) Interrupted KAIAL 0
LAST BREAKER MONITOR RESET 03/15/2001 07:21:31.067
=>>
Figure 9.9 Breaker Report (for the Most Recent Operation)
Breaker History
The relay displays the circuit breaker history report when you issue the
BRE 1 H or BRE 2 H commands. The report consists of as many as 128
circuit breaker monitor events stored in nonvolatile memory. These events are
determined by settings BM1TRP and BM1CLS. The breaker history report
is similar to Figure 9.10 (shown with typical data).
=>BRE 1 H <Enter>
Breaker 1 History Report
Relay 1 Date: 03/15/2001 Time: 07:19:27.156
Station A Serial Number: 01001234
No. Date Time Bkr.Op Op Time(ms) Pri I VDC1 VDC2
Elect Mech (A) (V) (V)
1 06/01/2000 12:24:36.216 Trp A 26 28 5460 119 118
2 06/01/2000 12:24:36.216 Trp B 26 28 5260 119 118
3 06/01/2000 12:24:36.216 Trp C 26 28 5160 119 119
4 09/26/1999 16:24:36.214 Cls A 39 35 1020 118 118
5 09/26/1999 16:24:36.214 Cls B 39 35 990 118 118
6 09/26/1999 16:24:36.214 Cls C 39 35 1010 118 118
7 03/26/1999 11:24:36.218 Cls C 39 35 1100 117 115
8 03/26/1999 11:24:31.218 Trp C 26 28 3460 116 112
128
=>
Figure 9.10 Breaker History Report
Preload Breaker Wear
You can preload a separate contact wear value for each pole of each circuit
breaker by using the commands BRE 1 P or BRE 2 P for Circuit Breaker 1
and Circuit Breaker 2, respectively. The relay adds the incremental contact
wear at all subsequent circuit breaker monitor initiations to your preloaded
value to obtain a total wear value. You can enter integer values of percentage
wear from 1 percent to 100 percent. In addition to preloading contact wear
data, you can enter values for previous operations and accumulated currents.
The maximum number of operations or accumulated primary current (in kA)
you can enter is 9999999. The circuit breaker preload terminal screen is
similar to Figure 9.11 for both the terminal and
ACSELERATOR QuickSet.
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