5.20
SEL-751 Relay Instruction Manual Date Code 20170927
Metering and Monitoring
Breaker Monitor
These three points are entered with the settings in Table 5.11.
The following settings are made from the breaker maintenance information in
Table 5.10 and Figure 5.19. Figure 5.20 shows the resultant breaker
maintenance curve.
COSP1 = 10000
COSP2 = 150
COSP3 = 12
KASP1 = 1.20
KASP2 = 8.00
KASP3 = 20.00
Table 5.11 Breaker Monitor Settings
Setting Prompt Setting Range
Setting Name :=
Fac to ry Defa ult
Breaker Monitor (Y,N) EBMON := Y
CL/OPN OPS SETPT 1 (0–65000) COSP1 := 10000
a
a
COSP1 must be set greater than COSP2.
CL/OPN OPS SETPT 2 (0–65000) COSP2 := 150
bc
b
COSP2 must be set greater than or equal to COSP3.
c
If KASP2 is set the same as KASP3, then COSP2 must be set the same as COSP3.
CL/OPN OPS SETPT 3 (0–65000) COSP3 := 12
kA PRI INTERRPTD 1 (0.10–999.00 kA) KASP1 := 1.20
d
d
KASP1 must be set less than KASP2 and KASP2 must be less than or equal to KASP3.
kA PRI INTERRPTD 2 (0.10–999.00 kA) KASP2 := 8.00
kA PRI INTERRPTD 3 (0.10–999.00 kA) KASP3 := 20.00
e
e
KASP3 must be set at least five times (but no more than 100 times) the KASP1 setting value.
BRKR MON CONTROL SELOGIC BKMON := TRIP
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