6.169
Date Code 20171021 Instruction Manual SEL-421 Relay
Protection Applications Examples
Circuit Breaker Failure Application Examples
Breaker 1 Failure Logic (Group)
50FP1 Phase Fault Current Pickup—BK1 (0.50–50 A secondary) 2.10
BFPU1 Breaker Failure Time Delay—BK1 (0.000–6000 cycles) 10.000
SPBFU1 SPT Breaker Failure Time Delay—BK1 (0.000–6000 cycles) 5.000
RTPU1 Retrip Time Delay—BK1 (0.000–6000 cycles) 3.000
RT3PPU1 Three-Pole Retrip Time Delay—BK1 (0.000–6000 cycles) 3.000
BFI3P1 Three-Pole Breaker Failure Initiate—BK1 NA
BFIAI A-Phase Breaker Failure Initiate—BK1(SEL
OGIC Equation) BFIAT1 OR
TPA1
BFIB1 B-Phase Breaker Failure Initiate—BK1(SEL
OGIC Equation) BFIBT1 OR
TPB1
BFIC1 C-Phase Breaker Failure Initiate—BK1(SEL
OGIC Equation) BFICT1 OR
TPC1
BFIDO1 Breaker Fail Initiate Dropout Delay—BK1 (0.000–1000 cycles) 3.000
BFISP1 Breaker Fail Initiate Seal-In Delay—BK1 (0.000–1000 cycles) 4.000
ENCBF1 No Current/Residual Current Logic—BK1 (Y, N) N
ELCBF1 Load Current Breaker Failure Logic—BK1 (Y, N) N
EFOBF1 Flashover Breaker Failure Logic—BK1 (Y, N) N
BFTR1 Breaker Failure Trip—BK1 (SEL
OGIC Equation) FBF1
BFULTR1 Breaker Failure Unlatch Trip—BK1 (SEL
OGIC Equation) IN104
Control Outputs
OUT101 TPA1
OUT102 TPB1
OUT103 TPC1
OUT107 BFTRIP1
OUT201 TPA2
OUT202 TPB2
OUT203 TPC2
OUT204 RTA1
OUT205 RTB1
OUT206 RTC1
OUT207 RTA2
OUT208 RTB2
OUT209 RTC2
Table 6.44 Settings for Circuit Breaker Failure Example 2 (Sheet 2 of 2)
Setting Prompt Entry
To Next Page
Loading...
